=== 4.5.0 (2013-12-02)

* Support :on_commit=>(:drop|:delete_rows|:preserve_rows) options when creating temp tables on PostgreSQL (rosenfeld) (#737)

* Make Dataset#insert work on PostgreSQL if the table name is a SQL::PlaceholderLiteralString (jeremyevans) (#736)

* Copy unique constraints when emulating alter_table operations on SQLite (jeremyevans) (#735)

* Don't return clob column values as SQL::Blob instances in the db2 and ibmdb adapters unless use_clob_as_blob is true (jeremyevans)

* Make use_clob_as_blob false by default on DB2 (jeremyevans)

* Fix usage of Sequel::SQL::Blob objects as prepared statement arguments in jdbc/db2 adapter when use_clob_as_blob is false (jeremyevans)

* Add mssql_optimistic_locking plugin, using a timestamp/rowversion column to protect against concurrent updates (pinx, jeremyevans) (#731)

* Make Model.primary_key array immutable for composite keys (chanks) (#730)

=== 4.4.0 (2013-11-01)

* Make Database#tables not show tables in the recycle bin on Oracle (jeremyevans) (#728)

* Don't automatically order on all columns when emulating offsets for unordered datasets on DB2 (jeremyevans)

* Improve PostgreSQL type support in the jdbc/postgresql adapter (jeremyevans)

* Make offset emulation on Oracle work when using columns that can't be ordered (jeremyevans, sdeming) (#724, #725)

* Make filter by associations support handle associations with :conditions or block (jeremyevans)

* Make association cloning handle :block correctly for clones of clones (jeremyevans)

* Make association cloning handle :eager_block option correctly (jeremyevans)

* Make add_primary_key work on h2 (jeremyevans)

* Add support for foreign key parsing on Oracle (jeremyevans)

* Add support for foreign key parsing to the jdbc adapter (jeremyevans)

* Make add_foreign_key work on HSQLDB (jeremyevans)

* Add table_select plugin for selecting table.* instead of * for model datasets (jeremyevans)

* Issue constraint_validation table deletes before inserts, so modifying constraint via drop/add in same alter_table block works (jeremyevans)

* Support add_*/remove_*/remove_all_* pg_array_to_many association methods on unsaved model objects (jeremyevans)

* Add Sybase SQLAnywhere support via new sqlanywhere and jdbc/sqlanywhere adapters (gditrick, jeremyevans)

* Add Dataset#offset for setting the offset separately from the limit (Paul Henry, jeremyevans) (#717)

=== 4.3.0 (2013-10-02)

* Fix literalization of empty blobs on MySQL (jeremyevans) (#715)

* Ensure Dataset#page_count in pagination extension is at least one (jeremyevans) (#714)

* Recognize another disconnect error in the jdbc/as400 adapter (jeremyevans)

* Make Dataset#qualify and Sequel.delay work together (jeremyevans)

* Recognize citext type as string on PostgreSQL (isc) (#710)

* Support composite keys in the rcte_tree plugin (jeremyevans)

* Support composite keys in the tree plugin (jeremyevans)

* Make Migrator.migrator_class public (robertjpayne, jeremyevans) (#708)

* Make PostgreSQL empty array literalization work correctly on PostgreSQL <8.4 (jeremyevans)

* Add Sequel extensions guide (jeremyevans)

* Add model plugins guide (jeremyevans)

* Add error_sql Database extension, allowing DatabaseError#sql to return SQL query that caused underlying exception (jeremyevans)

* Make Dataset#each_page in pagination extension return enumerator if no block is given (justinj) (#702)

=== 4.2.0 (2013-09-01)

* Support custom :flags option in mysql2 adapter (jeremyevans) (#700)

* Add implementations of Dataset#freeze and Dataset#dup (jeremyevans)

* Add implementations of Model#dup and Model#clone (jeremyevans)

* Don't have partial_indexes returned by Database#indexes on MSSQL 2008+ (jeremyevans)

* Support partial indexes on SQLite 3.8.0+ (jeremyevans)

* Add Database#supports_partial_indexes? to check for partial index support (mluu, jeremyevans) (#698)

* The static_cache plugin now disallows saving/destroying if the :frozen=>false option is not used (jeremyevans)

* Support :frozen=>false option in static_cache plugin, for having new instances returned instead of frozen cached instances (jeremyevans)

* Add pg_static_cache_updater Database extension for listening for changes to tables and updating static_cache caches automatically (jeremyevans)

* Add mssql_emulate_lateral_with_apply extension for emulating LATERAL queries using CROSS/OUTER APPLY (jeremyevans)

* Support LATERAL queries via Dataset#lateral (jeremyevans)

* Add pg_loose_count Database extension, for fast approximate counts of PostgreSQL tables (jeremyevans)

* Add from_block Database extension, for having Database#from block affect FROM instead of WHERE (jeremyevans)

* Support :cursor_name option in postgres adapter Dataset#use_cursor (heeringa, jeremyevans) (#696)

* Fix placeholder literal strings when used with an empty placeholder hash (trydionel, jeremyevans) (#695)

=== 4.1.1 (2013-08-01)

* Fix select_map, select_order_map, and single_value methods on eager_graphed datasets (jeremyevans)

=== 4.1.0 (2013-08-01)

* Support :inherits option in Database#create_table on PostgreSQL, for table inheritance (jeremyevans)

* Handle dropping indexes for schema qualified tables on PostgreSQL (jeremyevans)

* Add Database#error_info on PostgreSQL 9.3+ if pg-0.16.0+ is used, to get a hash of metadata for a given database exception (jeremyevans)

* Allow prepared_statements plugin to work with instance_filters and update_primary_key plugins (jeremyevans)

* Support deferrable exclusion constraints on PostgreSQL using the :deferrable option (mfoody) (#687)

* Make Database#run and #<< accept SQL::PlaceholderLiteralString values (jeremyevans)

* Deprecate :driver option in odbc adapter since it appears to be broken (jeremyevans)

* Support :drvconnect option in odbc adapter for supplying the ODBC connection string directly (jeremyevans)

* Support mysql2 0.3.12+ result streaming via Dataset#stream (jeremyevans)

* Convert Java::JavaUtil::HashMap to ruby Hash in jdbc adapter, for better handling of PostgreSQL hstore type (jeremyevans) (#686)

* Raise NoMatchingRow if calling add_association with a primary key value that doesn't match an existing row (jeremyevans)

* Allow PostgreSQL add_constraint to support :not_valid option (jeremyevans)

* Allow CHECK constraints to have options by using an options hash as the constraint name (jeremyevans)

* Correctly raise error when using an invalid virtual row block function call (jeremyevans)

* Support REPLACE on SQLite via Dataset#replace and #multi_replace (etehtsea) (#681)

=== 4.0.0 (2013-07-01)

* Correctly parse composite primary keys on SQLite 3.7.16+ (jeremyevans)

* Recognize another disconnect error in the jdbc/oracle adapter (jeremyevans)

* Add pg_json_ops extension for calling JSON functions and operators in PostgreSQL 9.3+ (jeremyevans)

* Handle non-JSON plain strings, integers, and floats in PostgreSQL JSON columns in pg_json extension (jeremyevans)

* Dataset#from now accepts virtual row blocks (jeremyevans)

* Add Database#refresh_view on PostgreSQL to support refreshing materialized views (jeremyevans)

* Support the Database#drop_view :if_exists option on PostgreSQL (jeremyevans)

* Support the Database#{create,drop}_view :materialized option for creating materialized views in PostgreSQL 9.3+ (jeremyevans)

* Support the Database#create_view :recursive option for creating recursive views in PostgreSQL 9.3+ (jeremyevans)

* Support the Database#create_view :columns option for using explicit columns (jeremyevans)

* Support the Database#create_schema :owner and :if_not_exists options on PostgreSQL (jeremyevans)

* Support :index_type=>:gist option to create GIST full text indexes on PostgreSQL (jeremyevans)

* Add Postgres::ArrayOp#replace for the array_replace function in PostgreSQL 9.3+ (jeremyevans)

* Add Postgres::ArrayOp#remove for the array_remove function in PostgreSQL 9.3+ (jeremyevans)

* Add Postgres::ArrayOp#hstore for creating hstores from arrays (jeremyevans)

* Make Postgres::ArrayOp#[] return ArrayOp if given a range (jeremyevans)

* Ensure that CHECK constraints are surrounded with parentheses (jeremyevans)

* Ensure Dataset#unbind returned variable hash uses symbol keys (jeremyevans)

* Add pg_array_associations plugin, for associations based on PostgreSQL arrays containing foreign keys (jeremyevans)

* Add Sequel.deep_qualify, for easily doing a deep qualification (jeremyevans)

* Enable use of window functions for limited eager loading by default (jeremyevans)

* Handle offsets correctly when eager loading one_to_one associations (jeremyevans)

* Raise exception for infinite and NaN floats on MySQL (jeremyevans) (#677)

* Make dataset string literalization that requires database connection use dataset's chosen server (jeremyevans)

* Make sure an offset without a limit is handled correctly when eager loading (jeremyevans)

* Allow providing ranges as subscripts for array[start:end] (jeremyevans)

* Prepare one_to_one associations in the prepared_statements_associations plugin (jeremyevans)

* Use prepared statements when the association has :conditions in the prepared_statements_associations plugin (jeremyevans)

* Fix prepared statement usage in some additional cases in the prepared_statements_associations plugin (jeremyevans)

* Hex escape blob input on MySQL (jeremyevans)

* Handle more disconnect errors when using the postgres adapter with the postgres-pr driver (jeremyevans)

* Model#setter_methods private method now accepts 1 argument instead of 2 (jeremyevans)

* Model#set_restricted and #update_restricted private methods now accept 2 arguments instead of 3 (jeremyevans)

* ungraphed on an eager_graph dataset now resets the original row_proc (jeremyevans)

* eager_graph now returns a naked dataset (jeremyevans)

* All behavior deprecated in Sequel 3.48.0 has been removed (jeremyevans)

* Make adapter/integration spec environment variables more consistent (jeremyevans)

* Sequel no longer provides default databases for adapter/integration specs (jeremyevans)

* Model#save no longer calls #_refresh internally (jeremyevans)

* Model#set_all and #update_all can now update the primary key (jeremyevans)

* Integrate many_to_one_pk_lookup and association_autoreloading plugins into main associations plugin (jeremyevans)

* Make defaults_setter plugin operate in a lazy manner (jeremyevans)

* Plugins now extend the model class with ClassMethods before including InstanceMethods (jeremyevans)

* Remove Model::EMPTY_INSTANCE_VARIABLES (jeremyevans)

* Model.raise_on_typecast_failure now defaults to false (jeremyevans)

* Model#_save private method now only takes a single argument (jeremyevans)

* Remove Dataset#columns_without_introspection from columns_introspection extension (jeremyevans)

* Make boolean prepared statement arguments work on sqlite adapter when integer_booleans is true (jeremyevans)

* Make Database#tables and #views reflect search_path on PostgreSQL (jeremyevans)

* SQLite now defaults to true for integer_booleans and false for use_timestamp_timezones (jeremyevans)

* Make the default value for most option hashes a shared frozen hash (jeremyevans)

* Remove Sequel::NotImplemented exception (jeremyevans)

* Automatically alias single expressions in Dataset#get, #select_map, and #select_order_map, to work around possible DoS issues (jeremyevans)

* Use a connection queue instead of stack by default for threaded connection pools (jeremyevans)

* Remove SQL::SQLArray alias for SQL::ValueList (jeremyevans)

* Remove SQL::NoBooleanInputMethods empty module (jeremyevans)

=== 3.48.0 (2013-06-01)

* Make named_timezones extension usable by databases allowing timezone strings to be given to Database#timezone= (jeremyevans)

* Make Dataset#or just clone if given an empty argument (jeremyevans)

* Deprecated using a mismatched number of placeholders and arguments in a placeholder literal string (jeremyevans)

* Add Dataset#qualify_to and #qualify_to_first_source to sequel_3_dataset_methods extension (jeremyevans)

* Add scissors plugin for Model.update, .delete, and .destroy (jeremyevans)

* Validate against explicit nil values in NOT NULL columns with default values in the auto_validations plugin (jeremyevans)

* Support :not_null=>:presence option for auto_validations plugin, for using presence validation for not null columns (jeremyevans)

* Rename auto_validate_presence_columns to auto_validate_not_null_columns (jeremyevans)

* Make pg_hstore_ops extension integrate with pg_array, pg_hstore, and pg_array_ops extensions (jeremyevans)

* Add Sequel.json_parser_error_class and Sequel.object_to_json to allow the use of alternative JSON implementations (jeremyevans) (#662)

* Deprecate JSON.create_id usage in the json_serializer plugin (jeremyevans)

* Emulate offsets on Microsoft Access using reverse orders and total counts (jeremyevans) (#661)

* Make ado adapter handle disconnecting an already disconnected connection (jeremyevans)

* Deprecate parsing columns for the same table name in multiple schemas on jdbc (jeremyevans)

* Allow association_proxies plugin to accept a block to give user control over which methods are proxied to the dataset (jeremyevans) (#660)

* Deprecate calling Dataset#add_graph_aliases before #graph or #set_graph_aliases (jeremyevans)

* Deprecate Model.add_graph_aliases, .insert_multiple, .query, .set_overrides, .set_defaults, .to_csv, and .paginate (jeremyevans)

* Add guide for ordering code with Sequel (jeremyevans)

* Deprecate Database#transaction :disconnect=>:retry option (jeremyevans)

* Deprecate Model.set, .update, .delete, and .destroy (jeremyevans)

* Deprecate Dataset#set (jeremyevans)

* Add specs for bin/sequel (jeremyevans)

* Make constraint_validations plugin reflect validations by column (jeremyevans)

* Allow for per-model/per-validation type customization of validation options in constraint_validations plugin (jeremyevans)

* Make Database#constraint_validations in the constraint_validations plugin have raw row values (jeremyevans)

* Fix statement freeing in the ibmdb adapter (jeremyevans)

* Make single and class table inheritance plugins handle usage of set_dataset in a subclass (jeremyevans)

* Allow validates_schema_types in validation_helpers plugin accept an options hash (jeremyevans)

* Deprecate Model.set_primary_key taking multiple arguments (jeremyevans)

* Make auto_validations plugin work with databases that don't support index parsing (jeremyevans)

* Model classes will no longer call Database#schema if it isn't supported (jeremyevans)

* Speed up Model.with_pk and with_pk! class methods (jeremyevans)

* Speed up Dataset#clone when called without an argument (jeremyevans)

* Deprecate Postgres::PGRangeOp#{starts_before,ends_after} (jeremyevans)

* Deprecate global use of null_dataset, pagination, pretty_table, query, select_remove, schema_caching, schema_dumper, and to_dot extensions (jeremyevans)

* Deprecate Dataset.introspect_all_columns in the columns_introspection extension (jeremyevans)

* Add empty_array_ignore_nulls extension for ignoring null handling for IN/NOT with an empty array (jeremyevans)

* Deprecate Sequel.empty_array_handle_nulls accessor (jeremyevans)

* Deprecate Sequel.{k,ts,tsk}_require and Sequel.check_requiring_thread (jeremyevans)

* Discontinue use of manual thread-safe requiring (jeremyevans)

* Deprecate using an unsupported client_min_messages setting on PostgreSQL (jeremyevans)

* Deprecate passing non-hash 4th argument to Dataset#join_table (jeremyevans)

* Deprecate passing non-hash 2nd argument to Dataset#union/intersect/except (jeremyevans)

* Deprecate one_to_many with :one_to_one option raising an error (jeremyevans)

* Automatically typecast hash and array to string for string columns in the looser_typecasting extension (jeremyevans)

* Deprecate automatic typecasting of hash and array to string for string columns (jeremyevans)

* Deprecate :eager_loader and :eager_grapher association options getting passed 3 separate arguments (jeremyevans)

* Deprecate validates_not_string (jeremyevans)

* Deprecate casting via __type suffix for prepared type placeholders in the postgres adapter (jeremyevans)

* Deprecate json_serializer's Model.json_create (jeremyevans)

* Deprecate json_serializer from_json and xml_serializer from_xml :all_columns and :all_associations options (jeremyevans)

* Deprecate passing an unsupported lock mode to Dataset#lock on PostgreSQL (jeremyevans)

* Deprecate Model::InstanceMethods.class_attr_{overridable,reader} (jeremyevans)

* Deprecate all methods in Dataset::PUBLIC_APPEND_METHODS except for literal, quote_identifier, quote_schema_table (jeremyevans)

* Deprecate all methods in Dataset::PRIVATE_APPEND_METHODS (jeremyevans)

* Deprecate Dataset.def_append_methods (jeremyevans)

* Deprecate Dataset#table_ref_append (jeremyevans)

* Deprecate SQL::Expression#to_s taking an argument and returning a literal SQL string (jeremyevans)

* Deprecate creating Model class methods automatically from plugin public dataset methods (jeremyevans)

* Add Sequel.cache_anonymous_models accessor (jeremyevans)

* Deprecate Sequel::Model.cache_anonymous_models accessor (jeremyevans)

* Deprecate identity_map plugin (jeremyevans)

* Deprecate Model#set_values (jeremyevans)

* Deprecate pg_auto_parameterize and pg_statement_cache extensions (jeremyevans)

* Deprecate Model#pk_or_nil (jeremyevans)

* Deprecate Model.print and Model.each_page (jeremyevans)

* Deprecate Dataset checking that the Database implements the identifier mangling methods (jeremyevans)

* Deprecate Database#reset_schema_utility_dataset private method (jeremyevans)

* Speed up Database#fetch, #from, #select, and #get by using a cached dataset (jeremyevans)

* Make sure adapters with subadapters have fully initialized database instances before calling Database.after_initialize (jeremyevans)

* Set identifier mangling methods on Database initialization (jeremyevans)

* Switch internal use of class variables to instance variables (jeremyevans)

* Deprecate passing an options hash to Database#dataset or Dataset.new (jeremyevans)

* Speed up Dataset#clone (jeremyevans)

* Add sequel_3_dataset_methods extension for Dataset#[]=, #insert_multiple, #set, #to_csv, #db=, and #opts= (jeremyevans)

* Deprecate Dataset#[]=, #insert_multiple, #to_csv, #db=, and #opts= (jeremyevans)

* Add blacklist_security plugin for Model.restricted_columns, Model.set_restricted_columns, Model#set_except, and Model#update_except (jeremyevans)

* Deprecate Model.restricted_columns, Model.set_restricted_columns, Model#set_except, and Model#update_except (jeremyevans)

* Deprecate Database#default_schema (jeremyevans)

* Deprecate Sequel::NotImplemented and defining methods that raise it (jeremyevans)

* Add Database#supports_{index_parsing,foreign_key_parsing,table_listing,view_listing}? (jeremyevans)

* Deprecate Sequel.virtual_row_instance_eval accessor (jeremyevans)

* Deprecate sequel_core.rb and sequel_model.rb (jeremyevans)

* Add graph_each extension for Dataset#graph_each (jeremyevans)

* Deprecate Dataset#graph_each (jeremyevans)

* Add set_overrides extension for Dataset#set_overrides and #set_defaults (jeremyevans)

* Deprecate Dataset#set_overrides and #set_defaults (jeremyevans)

* Deprecate Database#query in the informix adapter (jeremyevans)

* Deprecate Database#do as an alias to execute/execute_dui in some adapters (jeremyevans)

* Deprecate modifying initial Dataset hash if the hash wasn't provided as an argument (jeremyevans)

* Make active_model plugin use an errors class with autovivification (jeremyevans)

* Deprecate Model::Errors#[] autovivification (returning empty array when missing) (jeremyevans)

* Add Model#errors_class private method for choosing the errors class on a per-model basis (jeremyevans)

* Add after_initialize plugin for the after_initialize hook (jeremyevans)

* Deprecate Model after_initialize hook (jeremyevans)

* Deprecate passing two arguments to Model.new (jeremyevans)

* Deprecate choosing reciprocal associations with conditions, blocks, or differing primary keys (jeremyevans)

* Deprecate choosing first from ambiguous reciprocal associations (jeremyevans)

* Deprecate validates_type allowing nil values by default (jeremyevans)

* Deprecate the correlated_subquery eager limit strategy (jeremyevans)

* Add hash_aliases extension for making Dataset#select and #from treat hashes as alias specifiers (jeremyevans)

* Deprecate having Dataset#select and #from treat hashes as alias specifiers (jeremyevans)

* Do not automatically convert virtual row block return values to arrays by some Dataset methods (jeremyevans)

* Add filter_having extension for making Dataset#{and,filter,exclude,or} affect the HAVING clause if present (jeremyevans)

* Deprecate Dataset#select_more meaning Dataset#select when called without an existing selection (jeremyevans)

* Deprecate Dataset#and, #or, and #invert raising exceptions for no existing filter (jeremyevans)

* Deprecate Dataset#{and,filter,exclude,or} affecting the HAVING clause (jeremyevans)

* Deprecate passing explicit columns to update as separate arguments to Model#save (jeremyevans)

* Allow specifying explicit columns to update in Model#save via the :columns option (jeremyevans)

* Add ability set the default for join_table's :qualify option via Dataset#default_join_table_qualification (jeremyevans)

* Deprecated :root=>true meaning :root=>:both in the json_serializer (jeremyevans)

* Deprecate core extension usage if the core_extensions have not been explicitly loaded (jeremyevans)

* Deprecate Symbol#{[],<,<=,>,>=} methods when using the core_extensions (jeremyevans)

* Add ruby18_symbol_extensions extension for the Symbol#{[],<,<=,>,>=} methods (jeremyevans)

=== 3.47.0 (2013-05-01)

* Don't fail for missing conversion proc in pg_typecast_on_load plugin (jeremyevans)

* Rename PGRangeOp #starts_before and #ends_after to #ends_before and #starts_after (soupmatt) (#655)

* Add Database#supports_schema_parsing? for checking for schema parsing support (jeremyevans)

* Handle hstore[] types on PostgreSQL if using pg_array and pg_hstore extensions (jeremyevans)

* Don't reset conversion procs when loading pg_* extensions (jeremyevans)

* Handle domain types when parsing the schema on PostgreSQL (jeremyevans)

* Handle domain types in composite types in the pg_row extension (jeremyevans)

* Add Database.extension, for loading an extension into all future databases (jeremyevans)

* Support a :search_path Database option for setting PostgreSQL search_path (jeremyevans)

* Support a :convert_infinite_timestamps Database option in the postgres adapter (jeremyevans)

* Support a :use_iso_date_format Database option in the postgres adapter, for per-Database specific behavior (jeremyevans)

* Add Model.default_set_fields_options, for having a model-wide default setting (jeremyevans)

* Make Model.map, .to_hash, and .to_hash_groups work without a query when using the static_cache plugin (jeremyevans)

* Support :hash_dup and Proc Model inherited instance variable types (jeremyevans)

* Handle aliased tables in the pg_row plugin (jeremyevans)

* Add input_transformer plugin, for automatically transform input to model column setters (jeremyevans)

* Add auto_validations plugin, for automatically adding not null, type, and unique validations (jeremyevans)

* Add validates_not_null to validation_helpers (jeremyevans)

* Add :setter, :adder, :remover, and :clearer association options for overriding the default modification behavior (jeremyevans)

* Add Database#register_array_type to the pg_array extension, for registering database-specific array types (jeremyevans)

* Speed up fetching model instances when using update_primary_key plugin (jeremyevans)

* In the update_primary_key plugin, if the primary key column changes, clear related associations (jeremyevans)

* Add :allow_missing_migration_files option to migrators, for not raising if migration files are missing (bporterfield) (#652)

* Fix race condition related to prepared_sql for newly prepared statements (jeremyevans) (#651)

* Support :keep_reference=>false Database option for not adding reference to Sequel::DATABASES (jeremyevans)

* Make Postgres::HStoreOp#- explicitly cast a string argument to text, to avoid PostgreSQL assuming it is an hstore (jeremyevans)

* Add validates_schema_types validation for validating column values are instances of an appropriate class (jeremyevans)

* Allow validates_type validation to accept an array of allowable classes (jeremyevans)

* Add Database#schema_type_class for getting the ruby class or classes related to the type symbol (jeremyevans)

* Add error_splitter plugin, for splitting multi-column errors into separate errors per column (jeremyevans)

* Skip validates_unique validation if underlying columns are not valid (jeremyevans)

* Allow Model#modified! to take an optional column argument and mark that column as being modified (jeremyevans)

* Allow Model#modified? to take an optional column argument and check if that column has been modified (jeremyevans)

* Make Model.count not issue a database query if using the static_cache plugin (jeremyevans)

* Handle more corner cases in the many_to_one_pk_lookup plugin (jeremyevans)

* Handle database connection during initialization in jdbc adapter (jeremyevans) (#646)

* Add Database.after_initialize, which takes a block and calls the block with each newly created Database instance (ged) (#641)

* Add a guide detailing PostgreSQL-specific support (jeremyevans)

* Make model plugins deal with frozen instances (jeremyevans)

* Allow freezing of model instances for models without primary keys (jeremyevans)

* Reflect constraint_validations extension :allow_nil=>true setting in the database constraints (jeremyevans)

* Add Plugins.after_set_dataset for easily running code after set_dataset (jeremyevans)

* Add Plugins.inherited_instance_variables for easily setting class instance variables when subclassing (jeremyevans)

* Add Plugins.def_dataset_methods for easily defining class methods that call dataset methods (jeremyevans)

* Make lazy_attributes plugin no longer depend on identity_map plugin (jeremyevans)

* Make Dataset#get with an array of values handle case where no row is returned (jeremyevans)

* Make caching plugin handle memcached API for deletes if ignore_exceptions option is used (rintaun) (#639)

=== 3.46.0 (2013-04-02)

* Add Dataset#cross_apply and Dataset#outer_apply on Microsoft SQL Server (jeremyevans)

* Speed up threaded connection pools when :connection_handling=>:queue is used (jeremyevans)

* Allow external connection pool classes to be loaded automatically (jeremyevans)

* Add Dataset#with_pk! for model datasets, like #with_pk, but raising instead of returning nil (jeremyevans)

* Add Dataset#first!, like #first, but raising a Sequel::NoMatchingRow exception instead of returning nil (jeremyevans)

* Dataset #select_map, #select_order_map, and #get no longer support a plain string inside an array of arguments (jeremyevans)

* Escape ] characters in identifiers on Microsoft SQL Server (jeremyevans)

* Add security guide (jeremyevans)

* Make validates_type handle false values correctly (jeremyevans) (#636)

* Have associations, composition, serialization, and dirty plugins clear caches in some additional cases (jeremyevans) (#635)

* Add alter_table drop_foreign_key method for dropping foreign keys by column names (raxoft, jeremyevans) (#627)

* Allow creation named column constraints via :*_constraint_name column options (jeremyevans)

* Handle drop_constraint :type=>:primary_key on H2 (jeremyevans)

* Handle infinite dates in the postgres adapter using Database#convert_infinite_timestamps (jeremyevans)

* Make the looser_typecasting extension use looser typecasting for decimal columns as well as integers and floats (jeremyevans)

* Do strict typecasting of decimal columns by default, similar to integer/float typecasting (jeremyevans)

=== 3.45.0 (2013-03-01)

* Remove bad model typecasting of money type on PostgreSQL (jeremyevans) (#624)

* Use simplecov instead of rcov for coverage testing on 1.9+ (jeremyevans)

* Make the Database#quote_identifier method public (jeremyevans)

* Make PostgreSQL metadata parsing handle tables with the same name in multiple schemas (jeremyevans)

* Switch query extension to use a proxy instead of Object#extend (chanks, jeremyevans)

* Remove Dataset#def_mutiation_method instance method (jeremyevans)

* Make foreign key parsing on MySQL not pick up foreign keys in other databases (jeremyevans)

* Allow per-instance overrides of Postgres.force_standard_strings and .client_min_messages (jeremyevans) (#618)

* Add Sequel.tzinfo_disambiguator= to the named_timezones plugin for automatically handling TZInfo::AmbiguousTime exceptions (jeremyevans) (#616)

* Add Dataset#escape_like, for escaping LIKE metacharacters (jeremyevans) (#614)

* The LIKE operators now use an explicit ESCAPE '\' clause for similar behavior across databases (jeremyevans)

* Make Database#tables and #views accept a :qualify option on PostgreSQL to return qualified identifiers (jeremyevans)

* Make json_serializer and xml_serializer plugins secure by default (jeremyevans)

* Address JSON.parse vulnerabilities (jeremyevans)

* Fix Dataset#from_self! to no longer create a self-referential dataset (jeremyevans)

* Use SQLSTATE or database error codes if available instead of regexp parsing for more specific DatabaseErrors (jeremyevans)

* Add unlimited_update plugin to work around MySQL warning in replicated environments (jeremyevans)

* Add the :retry_on and :num_retries transaction options for automatically retrying transactions (jeremyevans)

* Raise serialization failures/deadlocks as Sequel::SerializationFailure exceptions (jeremyevans)

* Support transaction isolation levels on Oracle and DB2 (jeremyevans)

* Support transaction isolation levels when using the JDBC transaction support (jeremyevans)

=== 3.44.0 (2013-02-04)

* Speedup mysql2 adapter with identifier output method fetch speed by up to 50% (jeremyevans)

* Speedup tinytds adapter fetch speed by up to 60% (jeremyevans)

* Expand columns_introspection extension to consider cached schema values in the database (jeremyevans)

* Expand columns_introspection extension to handle subselects (jeremyevans)

* Have #last and #paged_each for model datasets order by the model's primary key by default (jeremyevans)

* Improve emulated offset support to handle subqueries (jeremyevans)

* Remove use of Object#extend from the eager_each plugin (jeremyevans)

* Add support for temporary views on SQLite and PostgreSQL via the :temp option to create_view (chanks, jeremyevans)

* Emulate Database#create_or_replace_view if not supported directly (jeremyevans)

* Add Dataset#paged_each, for processing entire datasets without keeping all rows in memory (jeremyevans)

* Add Sequel::ConstraintViolation exception class and subclasses for easier exception handling (jeremyevans)

* Fix use of identity_map plugin with many_to_many associations with right composite keys (chanks) (#603)

* Increase virtual row performance by using a shared VirtualRow instance (jeremyevans)

* Allow the :dataset association option to accept the association reflection as an argument (jeremyevans)

* Improve association method performance by caching intermediate dataset (jeremyevans)

=== 3.43.0 (2013-01-08)

* Move the #meta_def support for Database, Dataset, and Model to the meta_def extension (jeremyevans)

* Fix Database#copy_into on jdbc/postgres when an exception is raised (jeremyevans)

* Add core_refinements extension, providing refinement versions of Sequel's core extensions (jeremyevans)

* Make Database#copy_into raise a DatabaseError if the database signals an error in the postgres adapter (jeremyevans)

* Define respond_to_missing? where method_missing is defined and the object supports respond_to? (jeremyevans)

* Allow lambda procs with 0 arity as virtual row blocks on ruby 1.9 (jeremyevans)

* Handle schema-qualified row_types in the pg_array integration in the pg_row extension (jeremyevans) (#595)

* Support default_schema when reseting primary key sequences on PostgreSQL (jeremyevans) (#596)

* Allow treating tinyint(1) unsigned columns as booleans in the mysql adapters (jeremyevans)

* Support the jdbc-hsqldb gem in the jdbc adapter, since it has been updated to 2.2.9 (jeremyevans)

* Work with new jdbc-* gems that require manual driver loading (kares) (#598)

* Cast blobs correctly on DB2 when use_clob_as_blob is false (mluu, jeremyevans) (#594)

* Add date_arithmetic extension for database-independent date calculations (jeremyevans)

* Make Database#schema handle [host.]database.schema.table qualified tables on Microsoft SQL Server (jeremyevans)

* Add Dataset#split_qualifiers helper method for splitting a qualifier identifier into array of strings (jeremyevans)

* Make Database#schema_and_table always return strings for the schema and table (jeremyevans)

* Skip stripping of blob columns in the string_stripper plugin (jeremyevans) (#593)

* Allow Dataset#get to take an array to return multiple values, similar to map/select_map (jeremyevans)

* Default :prefetch_rows to 100 in the Oracle adapter (andrewhr) (#592)

=== 3.42.0 (2012-12-03)

* If an exception occurs while committing a transaction, attempt to rollback (jeremyevans)

* Support setting default string column sizes on a per-Database basis via default_string_column_size (jeremyevans)

* Reset Model.instance_dataset when extending the model's dataset (jeremyevans)

* Make the force_encoding plugin work with frozen strings (jeremyevans)

* Add Database#do on PostgreSQL for using the DO anonymous code block execution statement (jeremyevans)

* Remove Model.dataset_methods (jeremyevans)

* Allow subset to be called inside a dataset_module block (jeremyevans)

* Make Dataset#avg, #interval, #min, #max, #range, and #sum accept virtual row blocks (jeremyevans)

* Make Dataset#count use a subselect when the dataset has an offset without a limit (jeremyevans) (#587)

* Dump deferrable status of unique indexes on PostgreSQL (radford) (#583)

* Extend deferrable constraint support to all types of constraints, not just foreign keys (radford, jeremyevans) (#583)

* Support Database#copy_table and #copy_into on jdbc/postgres (bdon) (#580)

* Make Dataset#update not use a limit (TOP) on Microsoft SQL Server 2000 (jeremyevans) (#578)

=== 3.41.0 (2012-11-01)

* Add bin/sequel usage guide (jeremyevans)

* Make Dataset#reverse and #reverse_order accept virtual row blocks (jeremyevans)

* Add Sequel.delay for generic delayed evaluation (jeremyevans)

* Make uniqueness validations correctly handle nil values (jeremyevans)

* Support :unlogged option for create_table on PostgreSQL (JonathanTron) (#575)

* Add ConnectionPool#pool_type to get the type of connection pool in use (jeremyevans)

* Explicitly mark primary keys as NOT NULL on SQLite (jeremyevans)

* Add support for renaming primary key columns on MySQL (jeremyevans)

* Add connection_validator extension for automatically checking connections and transparently handling disconnects (jeremyevans)

* Add Database#valid_connection? for checking whether a given connection is valid (jeremyevans)

* Make dataset.limit(nil, nil) reset offset as well as limit (jeremyevans) (#571)

* Support IMMEDIATE/EXCLUSIVE/DEFERRED transaction modes on SQLite (Eric Wong)

* Major change in the Database <-> ConnectionPool interface (jeremyevans)

* Make touch plugin handle touching of many_*_many associations (jeremyevans)

* Make single_table_inheritance plugin handle non-bijective mappings (hannesg) (#567)

* Support foreign key parsing on MSSQL (munkyboy) (#564)

* Include SQL::AliasMethods in most pg_* extension objects (treydempsey, jeremyevans) (#563)

* Handle failure to create a prepared statement better in the postgres, mysql, and mysql2 adapters (jeremyevans) (#560)

* Treat clob columns as strings instead of blobs (jeremyevans)

=== 3.40.0 (2012-09-26)

* Add a cubrid adapter for accessing CUBRID databases via the cubrid gem (jeremyevans)

* Add a jdbc/cubrid adapter for accessing CUBRID databases via JDBC on JRuby (jeremyevans)

* Return OCI8::CLOB values as ruby Strings in the Oracle adapter (jeremyevans)

* Use clob for String :text=>true types on Oracle, DB2, HSQLDB, and Derby (jeremyevans) (#555)

* Allowing marshalling of Sequel::Postgres::HStore (jeremyevans) (#556)

* Quote channel identifier names when using LISTEN/NOTIFY on PostgreSQL (jeremyevans)

* Handle nil values when formatting bound variable arguments in the pg_row extension (jeremyevans) (#548)

* Handle nil values when parsing composite types in the pg_row extension (jeremyevans) (#548)

* Add :disconnect=>:retry option to Database#transaction, for automatically retrying the transaction on disconnect (jeremyevans)

* Greatly improved support on Microsoft Access (jeremyevans)

* Support Database#{schema,tables,views,indexes,foreign_key_list} when using ado/access adapter (ericgj) (#545, #546)

* Add ado/access adapter for accessing Microsoft Access via the ado adapter (jeremyevans)

* Combine disconnect error detection for mysql and mysql2 adapters (jeremyevans)

* Update the association_pks plugin to handle composite primary keys (chanks, jeremyevans) (#544)

=== 3.39.0 (2012-09-01)

* Fix defaults_setter to set false default values (jeremyevans)

* Fix serial sequence query in Database#primary_key_sequence on PostgreSQL (jeremyevans) (#538)

* Add Database#copy_into when using postgres adapter with pg driver, for very fast inserts into tables (jeremyevans)

* Combine multiple alter_table operations into a single query where possible on MySQL and PostgreSQL (jeremyevans)

* Handle sets of alter_table operations on MySQL and MSSQL where later operations depend on earlier ones (jeremyevans)

* Add constraint_validations plugin for automatic validations of constaints defined by extension (jeremyevans)

* Add constraint_validations extension for defining database constraints similar to validations (jeremyevans)

* Add Database#supports_regexp? for checking for regular expression support (jeremyevans)

* Add Sequel.trim for cross platform trim function (jeremyevans)

* Add Sequel.char_length for cross platform char_length function (jeremyevans)

* Fixing caching of MySQL server version (hannesg) (#536)

* Allow overriding the convert_tinyint_to_bool setting on a per-Dataset basis in the mysql and mysql2 adapters (jeremyevans)

* Make ValidationFailed and HookFailed exceptions have model method that returns the related model (jeremyevans)

* Automatically wrap array arguments to most PGArrayOp methods in PGArrays (jeremyevans)

* Add set_column_not_null to alter table generator for marking a column as not null (jeremyevans)

* Default second argument of set_column_allow_null to true in alter table generator (jeremyevans)

* Allow Dataset#count to take an argument or virtual row block (jeremyevans)

* Attempt to recognize CURRENT_{DATE,TIMESTAMP} defaults and return them as Sequel::CURRENT_{DATE,TIMESTAMP} (jeremyevans)

* Make dataset.insert(model) assume a single column if model uses the pg_row plugin (jeremyevans)

* No longer handle model instances in plain (non-model) datasets when inserting (jeremyevans)

* Use subselects for model classes as tables in join methods in model datasets if the model's dataset isn't a simple select (jeremyevans)

* No longer handle model classes as tables in join/graph methods in plain (non-model) datasets (jeremyevans)

* Make Time->DateTime and DateTime->Time typecasts retain fractional seconds on ruby 1.8 (jeremyevans) (#531)

* Add bin/sequel -c support, for running code string instead of using an IRB prompt (jeremyevans)

* Allow subclasses plugin to take a block, which is called with each subclasses created (jeremyevans)

* Add :where option to validates_unique, for custom uniqueness filters (jeremyevans)

* Add :connection_handling=>:disconnect option for threaded connection pools (jeremyevans)

* Add Postgres::PGRowOp#* for referencing the members of the composite type as separate columns (jeremyevans)

* Make identity_map plugin work with models lacking a primary key (jeremyevans)

* Recognize MySQL set type and default value (jeremyevans) (#529)

=== 3.38.0 (2012-08-01)

* Sequel now recognizes the double(x, y) and double(x, y) unsigned MySQL types (Slike9, jeremyevans) (#528)

* The swift subadapters now require swift-db-* instead of swift itself (deepfryed, jeremyevans) (#526)

* Add :textsize option to tinytds adapter to override the default TEXTSIZE (jeremyevans, wardrop) (#525)

* Support an output identifier method in the swift adapter (jeremyevans)

* Add Model#to_hash as an alias to Model#values (jeremyevans)

* When loading multiple pg_* extensions via Database#extension, only reset the conversion procs once (jeremyevans)

* Don't allow model typecasting from string to postgres array, hstore, or composite types (jeremyevans)

* Add pg_typecast_on_load plugin for converting advanced PostgreSQL types on load the {jdbc,do,swift}/postgres adapters (jeremyevans)

* Make all adapters that connect to PostgreSQL store type conversion procs (jeremyevans)

* Add type oid to column schema on PostgreSQL (jeremyevans)

* Add pg_row plugin, for using Sequel::Model classes to represent PostgreSQL row-valued/composite types (jeremyevans)

* Add pg_row_ops extension for DSL support for PostgreSQL row-valued/composite types (jeremyevans)

* Add pg_row extension for dealing with PostgreSQL row-valued/composite types (jeremyevans)

* Allow custom registered array types in the pg_array extension to be Database instance specific (jeremyevans)

* Remove Sequel::SQL::IdentifierMethods (jeremyevans)

* Don't have the schema_dumper extension produce code that relies on the core_extensions (jeremyevans)

* Fix dropping of columns with constraints on Microsoft SQL Server (mluu, jeremyevans) (#515, #518)

* Don't have pg_* extensions add methods to core classes unless the core_extensions extension is loaded (jeremyevans)

* Use real boolean literals on derby 10.7+ (jeremyevans, matthauck) (#514)

* Work around JRuby 1.6 ruby 1.9 mode bug in Time#nsec for Time prepared statement arguments on jdbc (jeremyevans)

* Handle blob prepared statement arguments on jdbc/db2 and jdbc/oracle (jeremyevans)

* Handle blob values in the swift adapter (jeremyevans)

* Handle better nil prepared statement arguments on jdbc (jeremyevans) (#513)

* Make SQL::Blob objects handle as, cast, and lit methods even if the core extensions are not loaded (jeremyevans)

* Make #* with no arguments produce a ColumnAll for Identifier and QualifiedIdentifier (jeremyevans)

* Sequel.expr(:symbol) now returns Identifier, QualifiedIdentifier, or AliasedExpression instead of Wrapper (jeremyevans)

* Treat clob columns as string instead of blob on Derby (jeremyevans) (#509)

=== 3.37.0 (2012-07-02)

* Allow specifying eager_graph alias base on a per-call basis using an AliasedExpression (jeremyevans)

* Allow bin/sequel to respect multiple -l options for logging to multiple files (jeremyevans)

* Correctly handle cases where SCOPE_IDENTITY is nil in the odbc/mssql adapter (stnoonan, jeremyevans)

* Add pg_interval extension, for returning interval types as ActiveSupport::Duration instances (jeremyevans)

* Save a new one_to_one associated object once instead of twice in the nested_attributes plugin (jeremyevans)

* Don't add unnecessary filter condition when passing a new object to a one_to_one setter method (jeremyevans)

* Differentiate between column references and method references in many_through_many associations (jeremyevans)

* Use :qualify=>:deep option when joining tables in model association datasets (jeremyevans)

* Support :qualify=>:deep option to Dataset#join_table to qualify subexpressions in the expression tree (jeremyevans)

* Support :qualify=>false option to Dataset#join_table to not automatically qualify keys/values (jeremyevans)

* Make filter by associations support use column references and method references correctly (jeremyevans)

* Call super in list plugin before_create (jeremyevans) (#504)

* Do not automatically cast String to text in pg_auto_parameterize extension (jeremyevans)

* Support alter_table validate_constraint on PostgreSQL for validating constraints previously declared with NOT VALID (jeremyevans)

* Support :not_valid option when adding foreign key constraints on PostgreSQL (jeremyevans)

* Support exclusion constraints on PostgreSQL (jeremyevans)

* Allow for overriding the create/alter table generators used per Database object (jeremyevans)

* Make casting to Date/(Time/DateTime) use date/datetime functions on SQLite (jeremyevans)

* Add pg_range_ops extension for DSL support for PostgreSQL range operators and functions (jeremyevans)

* The json library is now required when running the plugin/extension specs (jeremyevans)

* Use change migrations instead of up/down migrations in the schema_dumper (jeremyevans)

* Dump unsigned integer columns with a check >= 0 constraint in the schema_dumper (stu314)

* Switch the :key_hash entry to the association :eager_loader option to use the method symbol(s) instead of the column symbol(s) (jeremyevans)

* Add :id_map entry to the hash passed to the association :eager_loader option, for easier custom eager loading (jeremyevans)

* Fix dumping of non-integer foreign key columns in the schema_dumper (jeremyevans) (#502)

* Add nested_attributes :fields option to be a proc that is called with the associated object (chanks) (#498)

* Add split_array_nil extension, for compiling :col=>[1, nil] to col IN (1) OR col IS NULL (jeremyevans)

* Add Database#extension and Dataset#extension for loading extension modules into objects automatically (jeremyevans)

* Respect an existing dataset limit when updating on Microsoft SQL Server (jeremyevans)

* Add pg_range extension, for dealing with PostgreSQL 9.2+ range types (jeremyevans)

* Make pg_array extension convert array members when typecasting Array to PGArray (jeremyevans)

* Make jdbc/postgres adapter convert array type elements (e.g. date[] arrays are returned as arrays of Date instances) (jeremyevans)

* Make the pg_inet extension handle inet[]/cidr[]/macaddr[] types when used with the pg_array extension (jeremyevans)

* Make the pg_json extension handle json[] type when used with the pg_array extension (jeremyevans)

* Fix schema parsing of h2 clob types (jeremyevans)

* Make the pg_array extension handle array types for scalar types handled by the native postgres adapter (jeremyevans)

* Generalize handling of array types in the pg_array extension, allowing easy support of custom array types (jeremyevans)

* Remove type conversion of int2vector and money types on PostgreSQL, since previous conversions were wrong (jeremyevans)

* Add eval_inspect extension, which makes Sequel::SQL::Expression#inspect attempt to return a string suitable for eval (jeremyevans)

* When emulating offset with ROW_NUMBER, default to ordering by all columns if no specific order is given (stnoonan, jeremyevans) (#490)

* Work around JRuby 1.6 ruby 1.9 mode bug in Time -> SQLTime conversion (jeremyevans)

=== 3.36.1 (2012-06-01)

* Fix jdbc adapter when DriverManager#getConnection fails (aportnov) (#488)

=== 3.36.0 (2012-06-01)

* Use Bignum generic type when dumping unsigned integer types that could potentially overflow 32-bit signed integer values (stu314)

* Support :transform option in the nested_attributes plugin, for automatically preprocessing input hashes (chanks)

* Support :unmatched_pk option in the nested_attributes plugin, can be set to :create for associated objects with natural keys (chanks)

* Support composite primary keys in the nested_attributes plugin (chanks)

* Allow Model#from_json in the json_serializer plugin to use set_fields if a :fields option is given (jeremyevans)

* Support :using option to set_column_type on PostgreSQL, to force a specific conversion from the old value to the new value (jeremyevans)

* Drop indexes in the reverse order that they were added in the schema dumper (jeremyevans)

* Add :index_names option to schema dumper method, can be set to false or :namespace (stu314, jeremyevans)

* Add Database#global_index_namespace? for checking if index namespace is global or per table (jeremyevans)

* Fix typecasting of time columns on jdbc/postgres, before could be off by a millisecond (jeremyevans)

* Add document explaining Sequel's object model (jeremyevans)

* Attempt to detect more disconnect errors in the mysql2 adapter (jeremyevans)

* Add is_current? and check_current to the migrators, for checking/raising if there are unapplied migrations (pvh, jeremyevans) (#487)

* Add a jdbc subadapter for the Progress database (Michael Gliwinski, jeremyevans)

* Add pg_inet extension, for working with PostgreSQL inet and cidr types (jeremyevans)

* Fix bug in model column setters when passing an object that raises an exception for ==('') (jeremyevans)

* Add eager_each plugin, which makes each on an eagerly loaded dataset do eager loading (jeremyevans)

* Fix bugs when parsing foreign keys for tables with explicit schema on PostgreSQL (jeremyevans)

* Remove Database#case_sensitive_like on SQLite (jeremyevans)

* Remove Database#single_value in the native sqlite adapter (jeremyevans)

* Make Dataset#get work with nil and false arguments (jeremyevans)

* Make json_serializer plugin respect :root=>:collection and :root=>:instance options (jeremyevans)

* Support savepoints in prepared transactions on MySQL 5.5.23+ (jeremyevans)

* Add pg_json extension, for working with PostgreSQL 9.2's new json type (jeremyevans)

* In the optimistic locking plugin, make refresh and save after a failed save work correctly (jeremyevans)

* Support partial indexes on Microsoft SQL Server 2008 (jeremyevans)

* Make Database#call pass blocks (jeremyevans)

* Support :each when preparing statements, useful for iterating over large datasets (jeremyevans)

* Support :if_exists and :cascade options when dropping indexes on PostgreSQL (jeremyevans)

* Support :concurrently option when adding and dropping indexes on PostgreSQL (jeremyevans)

* Make Database#transaction on PostgreSQL recognize :synchronous, :read_only, and :deferrable options (jeremyevans)

* Support :sql_mode option when connecting to MySQL (jeremyevans)

* Apply :timeout MySQL connection setting on do, jdbc, and swift adapters (jeremyevans)

* Don't set Sequel::Model.db automatically when creating an anonymous class with an associated database object (jeremyevans)

* Add :connection_handling=>:queue option to the threaded connection pools, may reduce chance of stale connections (jeremyevans) (#481)

* Handle JRuby 1.7 exception handling changes when connecting in the jdbc adapter (jeremyevans) (#477)

* Make *_to_one association setters be noops if you pass a value that is the same as the cached value (jeremyevans)

* Make Model#refresh return self when using dirty plugin (jeremyevans)

=== 3.35.0 (2012-05-01)

* Correctly handle parsing schema for tables in other databases on MySQL (jeremyevans)

* Add DSL support for the modulus operator (%), similar to the bitwise operators (jeremyevans)

* Fix possible thread-safety issues on non-GVL ruby implementations (jeremyevans)

* Allow truncation of multiple tables at the same time on PostgreSQL (jeremyevans)

* Allow truncate to take a :cascade, :only, and :restart options on PostgreSQL (hgimenez, jeremyevans)

* Allow json and xml serializers to support :array option in class to_json method to serialize existing array of model instances (jeremyevans)

* Add dirty plugin, which saves the initial value of the column when the value is changed (jeremyevans)

* create_table now supports an :as option to create a table directly from the results of a query (jeremyevans)

* The :index option when creating columns in the schema generator can now be a hash of options passed to index (jeremyevans)

* Parsing the default column values in the oracle adapter no longer requires superuser privileges (Jason Hines)

* Add Database#cache_schema to allow schema caching to be turned of, useful for development modes where models are reloaded (jeremyevans)

* Correctly handle errors that occur when rolling back transactions (jeremyevans)

* Recognize identity type in the schema dumper (jeremyevans) (#468)

* Don't assign instance variables to Java objects, for future JRuby 2.0 support (jeremyevans) (#466)

* Use date and timestamp formats that are multilanguage and not DATEFORMAT dependent on Microsoft SQL Server (jeremyevans)

* Add Database#log_exception, which logs when a query raises an exception, for easier overriding (jeremyevans) (#465)

* Make the migrators only use transactions by default if the database supports transactional DDL (jeremyevans)

* Add Database#supports_transactional_ddl? for checking if DDL statements can be rolled back in transactions (jeremyevans)

* Don't use auto parameterization when using cursors in the pg_auto_parameterize extension (jeremyevans) (#463)

* No longer escape backslashes in strings by default, fixes doubled backslashes on some adapters (jeremyevans)

* Escape blackslash-carriage return-line feed in strings on Microsoft SQL Server (mluu, jeremyevans) (#462, #461)

* Remove Array#all_two_pairs? (jeremyevans)

* Remove Dataset#disable_insert_returning on PostgreSQL (jeremyevans)

* Remove support for PostgreSQL <8.2 (jeremyevans)

* Remove support for Ruby <1.8.7 (jeremyevans)

=== 3.34.1 (2012-04-02)

* Fix bug in optimization of primary key lookup (jeremyevans) (#460)

=== 3.34.0 (2012-04-02)

* Fix connection failures when connecting to PostgreSQL with newer versions of swift (jeremyevans)

* Fix using a bound variable for a limit in the ibmdb adapter on ruby 1.9 (jeremyevans)

* primary_key :column, :type=>Bignum now works correctly on H2 (jeremyevans)

* Add query_literals extension for treating regular strings like literal strings in select, group, and order methods (jeremyevans)

* Actually use RETURNING for deletes/updates on PostgreSQL 8.2-9.0 (jeremyevans)

* You can now require 'sequel/no_core_ext' to load Sequel without the core extensions (jeremyevans)

* The core extensions have now been made a real Sequel extension (still loaded by default) (jeremyevans)

* VirtualRow#` has been added for creating literal strings (jeremyevans)

* VirtualRow instances now have operator methods defined {+,-,*,/,&,|,~,>,<,>=,<=} (jeremyevans)

* Array#all_two_pairs? is now deprecated and will be removed after 3.34.0 is released (jeremyevans)

* All of Sequel's core extensions now have equivalent methods defined on the Sequel module (jeremyevans)

* Add Sequel.core_extensions? for checking if the core extensions are enabled (jeremyevans)

* Increase speed of Model#this by about 85% (jeremyevans)

* Increase speed of Model#delete and #destroy by about 75% for models with simple datasets (jeremyevans)

* Make nested_attributes plugin work when destroying/removing associated objects when strict_param_setting is true (r-stu31) (#455)

* Dataset#disable_insert_returning on PostgreSQL is now deprecated and will be removed after 3.34.0 is released (jeremyevans)

* Double speed of Model[pk] for models with simple datasets (most models) (jeremyevans)

* Support for ruby <1.8.7 and PostgreSQL <8.2 is now deprecated and will be removed after 3.34.0 is released (jeremyevans)

* Add select_remove extension which adds Dataset#select_remove for removing columns/expressions from a dataset selection (jeremyevans)

* Add static_cache plugin, for staticly caching all model instances, useful for model tables that don't change (jeremyevans)

* Add Model#freeze implementation to get a working frozen model object (jeremyevans)

* Add many_to_one_pk_lookup plugin, for using a simple primary key lookup for many_to_one associations (great with caching) (jeremyevans)

* Use bigint type instead of integer for Bignum generic type on SQLite, except for auto incrementing primary keys (jeremyevans)

* Add Database#dump_foreign_key_migration for just dumping foreign key constraints to the schema dumper extension (jeremyevans)

* Dump foreign key constraints by default when using the schema dumper extension (jeremyevans)

* Don't raise an error when no indexes exist for a table when calling Database#indexes on the jdbc/sqlite adapter (jeremyevans)

* Copy composite foreign key constraints when emulating alter_table on SQLite (jeremyevans)

* Add Database#foreign_key_list for getting foreign key metadata for a given table on SQLite, MySQL, and PostgreSQL (jeremyevans)

* Add Dataset#to_hash_groups and #select_hash_groups for getting a hash with arrays of matching values (jeremyevans)

* Model#set_fields and #update_fields now respect :missing=>:skip and :missing=>:raise options for handling missing values (jeremyevans)

* The :on_update and :on_delete entries for foreign key can now take strings, which are used literally (jeremyevans)

* Add Database#convert_infinite_timestamps to the postgres adapter, can be set to :nil, :string, or :float (jeremyevans) (#454)

* Add Database#create_join_table and #drop_join_table for easily creating many-to-many join tables (jeremyevans)

* Fix Dataset#group_rollup/#group_cube on Microsoft SQL Server 2005 (jeremyevans)

* Add Dataset#explain on MySQL (jeremyevans)

* Change formatting and return value of Dataset#explain on SQLite (jeremyevans)

* Recognize unsigned tinyint types in the schema dumper (jeremyevans)

* Add null_dataset extension, for creating a dataset that never issues a database query (jeremyevans)

* Database#uri and #url now return nil if a connection string was not used when connecting (jeremyevans) (#453)

* Add schema_caching extension, to speed up loading a large number of models by loading cached schema information from a file (jeremyevans)

* Add Dataset#multi_replace on MySQL, allowing you to REPLACE multiple rows in a single query (danielb2) (#452)

* Double speed of Model#new with empty hash, and quadruple speed of Model#set with empty hash (jeremyevans)

* Allow SQL::QualifiedIdentifier objects to contain arbitrary Sequel expressions (jeremyevans)

* Add pg_hstore_ops extension, for easily calling PostgreSQL hstore functions and operators (jeremyevans)

* Add Sequel::SQL::Wrapper class for easier dealing with wrapper objects (jeremyevans)

* Add pg_hstore extension, for dealing with the PostgreSQL hstore (key/value table) type (jeremyevans)

* Add Database#type_supported? method on PostgreSQL for checking if the given type symbol/string is supported (jeremyevans)

* Convert Java::OrgPostgresqlUtil::PGobject instances to ruby strings in jdbc/postgres type conversion (jeremyevans)

* Allow PlaceholderLiteralString objects to store placeholder string as an array for improved performance (jeremyevans)

* Work around ruby-pg bugs 111 (Time/DateTime fractional seconds) and 112 ("\0" in bytea) in bound variable arguments (jeremyevans) (#450)

* Handle fractional seconds correctly for time type on jdbc/postgres (jeremyevans)

* Add pg_array_ops extension, for easily calling PostgreSQL array functions and operators (jeremyevans)

* Add SQL::Subscript#[] for using nested subscripts (accessing member of multi-dimensional array) (jeremyevans)

* Add Model.cache_anonymous_models accessor so you can disable the caching of classes created by Sequel::Model() (jeremyevans)

* Convert PostgreSQL JDBC arrays to Ruby arrays in the jdbc/postgres adapter (jeremyevans)

* The typecast_on_load extension now works correctly when saving new model objects when insert_select is enabled (jeremyevans)

* Add pg_array extension, for dealing with string and numeric PostgreSQL arrays (jeremyevans)

* Add Database#reset_conversion_procs to the postgres adapter, for use with extensions with modify default conversion procs (jeremyevans)

* Escape table and schema names when getting primary key or sequence information on PostgreSQL (jeremyevans)

* Escape identifiers when quoting on MySQL and SQLite (jeremyevans)

* Add Database#supports_drop_table_if_exists? for checking if DROP TABLE supports IF EXISTS (jeremyevans)

* Add Database#drop_table? for dropping a table if it already exists (jeremyevans)

* Log full SQL string by default for prepared statements created automatically by model prepared_statements* plugins (jeremyevans)

* Add ability for prepared statements to log full SQL string (jeremyevans)

* Add pg_statement_cache extension, for automatically preparing queries when using postgres adapter with pg driver (jeremyevans)

* Add pg_auto_parameterize extension, for automatically parameterizing queries when using postgres adapter with pg driver (jeremyevans)

* Add ConnectionPool#disconnection_proc= method, to modify disconnection_proc after the pool has been created (jeremyevans)

* Add ConnectionPool#after_connect= method, to modify after_connect proc after the pool has been created (jeremyevans)

* Add ConnectionPool#all_connections method, which yields all available connections in the pool (jeremyevans)

=== 3.33.0 (2012-03-01)

* Add ability to force or disable transactions completely in the migrators using the :use_transactions option (jeremyevans)

* Add ability to turn off transactions for migrations by calling no_transaction inside the Sequel.migration block (jeremyevans)

* Allow specifically choosing which migrator to use via TimestampMigrator.apply or IntegerMigrator.apply (jeremyevans)

* Add arbitrary_servers extension to allow the use of arbitrary servers/shards by providing a hash of options as the server (jeremyevans)

* Add server_block extension to scope database access inside the block to a specific default server/shard (jeremyevans)

* Respect :collate column option on MySQL (jeremyevans) (#445)

* Use Mysql2::Client::FOUND_ROWS to get accurate number of rows matched in the mysql2 adapter (jeremyevans)

* Use Mysql#info to get accurate number of rows matched in the mysql adapter (jeremyevans)

* Make mock adapter with specific SQL dialect use appropriate defaults for quoting identifiers (jeremyevans)

* Make list plugin automatically set position field value on creation if not already set (jeremyevans)

* Add Database#integer_booleans setting on SQLite to store booleans as integers (jeremyevans)

* Typecast columns stored as integers/floats in the SQLite adapter (jeremyevans)

* In the instance_hooks plugin, (before|after)_*_hook instance methods now return self (jeremyevans)

* Handle NaN, Infinity, and -Infinity floats on PostgreSQL (kf8a, jeremyevans) (#444)

* Support an :sslmode option when using the postgres adapter with the pg driver (jeremyevans)

* Add Database#create_schema and #drop_schema to the shared postgres adapter (tkellen, jeremyevans) (#440)

* Add Database#supports_savepoints_in_prepared_transactions?, false on MySQL >=5.5.12 (jeremyevans) (#437)

* Support an identifier output method in the mysql2 adapter (jeremyevans)

* Make foreign key creation work on MySQL with InnoDB engine without specifying :key option (jeremyevans)

* Allow disabling use of sudo with SUDO='' when running the rake install/uninstall tasks (jeremyevans) (#433)

=== 3.32.0 (2012-02-01)

* Make serialization_modification_detection plugin work correctly with new objects and after saving existing objects (jeremyevans) (#432)

* Make refreshes after model creation clear the deserialized values in the serialization plugin (jeremyevans)

* Add Dataset#update_ignore on MySQL, for using UPDATE IGNORE in queries (danielb2) (#429)

* Allow select_map/select_order_map to take both a column argument and a block (jeremyevans)

* Fix virtual row block handling in select_map/select_order_map if block returns an array (jeremyevans) (#428)

* Add Sequel.empty_array_handle_nulls setting, can be set to false for possible better performance on some databases (jeremyevans)

* Change exclude(:b=>[]) to not return rows where b is NULL (jeremyevans) (#427)

* Support ActiveModel 3.2 in the active_model plugin, by adding support for to_partial_path (jeremyevans)

* Fix metadata methods (e.g. tables) on Oracle when custom identifier input methods are used (jeremyevans)

* Fix Database#indexes on DB2 (jeremyevans)

* Make DateTime/Time columns with Sequel::CURRENT_TIMESTAMP default values use timestamp column on MySQL (jeremyevans)

* Wrap column default values in extra parens on SQLite, fixes some cases (jeremyevans)

* Make Database#indexes not include primary key indexes on Derby, HSQLDB, Oracle, and DB2 using the jdbc adapter (jeremyevans)

* Support Database#indexes in shared MSSQL adapter (jeremyevans)

* Support :include option when creating indexes on MSSQL, for storing column values in the index (crawlik) (#426)

* Make set_column_type not modify defaults and NULL/NOT NULL setting on MSSQL, H2, and SQLite (jeremyevans)

* Qualify identifiers when filtering/excluding by associations (jeremyevans)

* Make table_exists? better handle tables where you don't have permissions for all columns (jeremyevans) (#422)

* Using new association options, support associations based on columns that clash with ruby method names (jeremyevans) (#417)

* Add use_after_commit_rollback setting to models, can be turned off to allow model usage with prepared transactions (jeremyevans)

* Fix alter table emulation on SQLite when foreign keys reference the table being altered (jeremyevans)

* Fix progress shared adapter, broken since the dataset literalization refactoring (jeremyevans) (#414)

* Support :map and :to_hash prepared statement types (jeremyevans)

* Make Dataset#naked! work correctly (jeremyevans)

* Remove Dataset#paginate!, as it was broken (jeremyevans)

* Fix query extension to not break usage of #clone without arguments (jeremyevans) (#413)

=== 3.31.0 (2012-01-03)

* Dataset#from no longer handles :a__b__c___d as a.b.c AS d (jeremyevans)

* Support many_to_one associations with the same name as their column, using the :key_column option (jeremyevans)

* Add Model.def_column_alias for defining alias methods for columns (jeremyevans)

* Support :server option in Dataset#import and #multi_insert (jeremyevans)

* Respect existing RETURNING/OUTPUT clauses in #import/#multi_insert on PostgreSQL/MSSQL (jeremyevans)

* Support :return=>:primary_key option to Dataset#import and #multi_insert (jeremyevans)

* Correctly handle return value for Dataset#insert with column array and value array on PostgreSQL <8.2 (jeremyevans)

* Dataset#insert_multiple now returns an array of inserted primary keys (jeremyevans) (#408)

* Support RETURNING with DELETE and UPDATE on PostgreSQL 8.2+ (funny-falcon)

* Raise error if tables from two separate schema are detected when parsing the schema for a single table on PostgreSQL (jeremyevans)

* Handle clob types as string instead of blob on H2 (jeremyevans)

* Add database type support to the mock adapter, e.g. mock://postgres (jeremyevans)

* Allow creation of full text indexes on Microsoft SQL Server, but you need to provide a :key_index option (jeremyevans)

* Allow Dataset#full_text_search usage with prepared statements (jeremyevans)

* Make Dataset#exists use a PlaceholderLiteralString so it works with prepared statements (jeremyevans)

* Fix Dataset#empty? for datasets with offsets when offset support is emulated (jeremyevans)

* Add Dataset#group_rollup and #group_cube methods for GROUP BY ROLLUP and CUBE support (jeremyevans)

* Add support for custom serialization formats to the serialization plugin (jeremyevans)

* Support a :login_timeout option in the jdbc adapter (glebpom) (#406)

=== 3.30.0 (2011-12-01)

* Handle usage of on_duplicate_key_update in MySQL prepared statements (jeremyevans) (#404)

* Make after_commit and after_rollback respect :server option (jeremyevans) (#401)

* Respect :connect_timeout option in the postgres adapter when using pg (glebpom, jeremyevans) (#402)

* Make Dataset#destroy for model datasets respect dataset shard when using a transaction (jeremyevans)

* Make :server option to Model#save set the shard to use (jeremyevans)

* Move Model#set_server from the sharding plugin to the base plugin (jeremyevans)

* Add :graph_alias_base association option for setting base name to use for table aliases when eager graphing (jeremyevans)

* Make ILIKE work correctly on Microsoft SQL Server if database/column collation is case sensitive (jfirebaugh) (#398)

* When starting a new dataset graph, assume existing selection is the columns to select from the current table (jeremyevans)

* Allow specifying nanoseconds and offsets when converting a hash or array to a timestamp (jeremyevans, jfirebaugh) (#395)

* Improve performance when converting Java types to ruby types in the jdbc adapter (jeremyevans, jfirebaugh) (#395)

* Fix tinytds adapter if DB.identifier_output_method = nil (jeremyevans)

* Explicitly order by the row number column when emulating offsets (jfirebaugh) (#393)

* Fix Dataset#graph and #eager_graph modifying the receiver if the receiver is already graphed (jeremyevans) (#392)

* Change dataset literalization to an append-only-all-the-way-down design (jeremyevans)

=== 3.29.0 (2011-11-01)

* Allow Model.dataset_module to take a Module instance (jeremyevans)

* Apply Model.[] optimization in more cases (jeremyevans)

* Fix Model.[] optimization when dataset uses identifier_input_method different than database (jeremyevans)

* Work around pragma bug on jdbc/sqlite when emulating alter table support (jeremyevans)

* Database#<< and Dataset#<< now return self so they can be safely chained (jeremyevans)

* Fully support using an aliased table name as the :join_table option for a many_to_many association (jeremyevans)

* Make like case sensitive on SQLite and Microsoft SQL Server (use ilike for case insensitive matching) (jeremyevans)

* Add Database#extend_datasets for the equivalent of extending of the Database object's datasets with a module (jeremyevans)

* Speed up Dataset #map, #to_hash, and related methods if an array of symbols is given (jeremyevans)

* Add Database#dataset_class for modifying the class used for datasets for a single Database object (jeremyevans)

* Plugins that override Model.load should be modified to override Model.call instead (jeremyevans)

* Speed up loading model objects from the database by up to 7-16% (jeremyevans)

* Create accessor methods for all columns in a model's table, even if the dataset doesn't select the columns (jeremyevans)

* Add mock adapter for better mocking of a database connection (jeremyevans)

* Have models pass their dataset instead of table name to Database#schema (jeremyevans)

* Allow Database#schema to take a dataset as the table argument, and use its identifier input/output methods (jeremyevans)

* Significant improvements to the db2 adapter (jeremyevans)

* Handle methods with names that can't be called directly in Model.def_dataset_method (jeremyevans)

* Add dataset_associations plugin for making dataset methods that return datasets of associated objects (jeremyevans)

* Don't allow Model.def_dataset_method to override private model methods (jeremyevans)

* Parsing primary key information from system tables in the shared MSSQL adapter (jeremyevans)

* Fix handling of composite primary keys when emulating alter table operations on SQLite (jeremyevans)

* Emulate add_constraint and drop_constraint alter table operations on SQLite (jeremyevans)

* Apply the correct pragmas when connecting to SQLite via the Amalgalite and Swift adapters (jeremyevans)

* Fix bound variable usage for some types (e.g. Date) when used outside of prepared statements on SQLite (jeremyevans)

* Work around SQLite column naming bug when using subselects (jeremyevans)

* Make prepared_statements plugin work with adapters that require type specifiers for variable placeholders, such as oracle (jeremyevans)

* Add savepoint support to the generic JDBC transaction support (used by 6 jdbc subadapters) (jeremyevans)

* Add native prepared statement support to the oracle adapter (jeremyevans)

* Support sharding correctly by default when using transactions in model saving/destroying (jeremyevans)

* Add Database#in_transaction? method for checking if you are already in a transaction (jeremyevans)

* Add after_commit, after_rollback, after_destroy_commit, and after_destroy_rollback hooks to Model objects (jeremyevans)

* Add after_commit and after_rollback hooks to Database objects (jeremyevans) (#383)

* Support savepoints inside prepared transactions on MySQL (jeremyevans)

* Support opening transactions to multiple shards of the same Database object in the same Thread (jeremyevans)

* Add Sequel.transaction for running transactions on multiple databases at the same time (jeremyevans)

* Support :rollback => :always option in Database#transaction to always rollback the transaction (jeremyevans)

* Support :rollback => :reraise option in Database#transaction to reraise the Sequel::Rollback exception (jeremyevans)

* Add support for connecting to Apache Derby databases using the jdbc adapter (jeremyevans)

* Add support for connecting to HSQLDB databases using the jdbc adapter (jeremyevans)

* Fix inserting all default values into a table on DB2 (jeremyevans)

* Add :qualify option to many_to_one associations for whether to qualify the primary key column with the associated table (jeremyevans)

* Modify rcte_tree plugin to use column aliases if recursive CTEs require them (jeremyevans)

* Add Dataset#recursive_cte_requires_column_aliases? method to check if you must provide an argument list for a recursive CTE (jeremyevans)

* Much better support for Oracle in both the oci8-based oracle adapter and the jdbc oracle subadapter (jeremyevans)

* Handle CTEs in subselects in more places on databases that don't natively support CTEs in subselects (jeremyevans)

* Change Dataset#to_hash to not call the row_proc if 2 arguments are given (jeremyevans)

* Change Dataset#map to not call the row_proc if an argument is given (jeremyevans)

* Make Dataset#select_map and #select_order_map return an array of single element arrays if given an array with a single symbol (jeremyevans)

* Make Dataset#columns work correctly on jdbc, odbc, ado, and dbi adapters when using an emulated offset on MSSQL and DB2 (jeremyevans)

* Add Database#listen and #notify to the postgres adapter, for LISTEN and NOTIFY support (jeremyevans)

* Emulate the bitwise compliment operator on h2 (jeremyevans)

* Fix improper handling of emulated bitwise operators with more than two arguments (jeremyevans)

* Allow convert_invalid_date_time to be set on a per-Database basis in the mysql adapter (jeremyevans)

* Allow convert_tinyint_to_bool to be set on a per-Database basis in the mysql and mysql2 adapters (jeremyevans)

* Allow per-Database override of the typeconversion procs on the mysql, sqlite, and ibmdb adapters (jeremyevans)

* Add Database#timezone accessor, for overriding Sequel.database_timezone per Database object (jeremyevans)

=== 3.28.0 (2011-10-03)

* Add firebird jdbc subadapter (jeremyevans)

* Add SQLTime.create method for easier creation of SQLTime instances (jeremyevans)

* Make Dataset#with_pk use a qualified primary key, so it works correctly on joined datasets (jeremyevans)

* Support the :limit association option when using eager_graph (jeremyevans)

* Fix eager loading via eager_graph of one_to_one associations that match multiple associated objects and use order to pick the first one (jeremyevans)

* Make after_load association hooks apply when using eager_graph (jeremyevans)

* Make Dataset#with_sql treat a symbol as a first argument as a method name to call to get the SQL (jeremyevans)

* Make Dataset #delete, #insert, #update return array of plain hashes if block not given and Dataset#returning is used (jeremyevans)

* Allow Dataset #map, #to_hash, #select_map, #select_order_map, and #select_hash to take arrays of columns instead of single columns (jeremyevans)

* Make Dataset #delete, #insert, #update yield plain hashes to a block if Dataset#returning is used (jeremyevans)

* Add Dataset#returning for setting the columns to return in INSERT/UPDATE/DELETE statements, used by PostgreSQL 9.1 (jeremyevans)

* Support WITH clause in INSERT/UPDATE/DELETE on PostgreSQL 9.1+ (jeremyevans)

* Add Database#copy_table for PostgreSQL COPY support when using the postgres adapter with pg (jeremyevans)

* Support CREATE TABLE IF NOT EXISTS on PostgreSQL 9.1+ (jeremyevans)

* Add support for Sequel::Model.default_eager_limit_strategy to set the default :eager_limit_strategy for *_many associations (jeremyevans)

* Add support for an :eager_limit_strategy => :correlated_subquery value for limiting using correlated subqueries (jeremyevans)

* Allow use of a dataset that uses the emulated offset support on MSSQL and DB2 in an IN subquery by using a nested subquery (jeremyevans)

* Allow use of a dataset that uses LIMIT in an IN subquery on MySQL by using a nested subquery (jeremyevans)

* Work around serious ActiveSupport bug in Time.=== that breaks literalization of Time values (jeremyevans)

* Speed up SQL operator methods by using module_eval instead of define_method (jeremyevans)

* Support sql_(boolean,number,string) methods on ComplexExpressions, allowing you do to (x + 1).sql_string + 'a' for (x + 1) || 'a' (jeremyevans)

* Don't disallow SQL expression creation based on types, leave that to the database server (jeremyevans)

* Make :column [&|] 1 use an SQL bitwise [&|] expression instead of a logical (AND|OR) expression (jeremyevans)

* Make :column + 'a' use an SQL string concatenation expression instead of an addition expression (jeremyevans)

* Fix :time typecasting from Time to SQLTime for fractional seconds on ruby 1.9 (jeremyevans)

* Have Dataset#select_append check supports_select_all_and_column? and select all from all FROM and JOIN tables if no columns selected (jeremyevans)

* Add Dataset#supports_select_all_and_column? for checking if you can do SELECT *, column (jeremyevans)

* Add support for an :eager_limit_strategy => :window_function value for limiting using window functions (jeremyevans)

* Add support for an :eager_limit_strategy => :distinct_on value for one_to_one associations for using DISTINCT ON (jeremyevans)

* Add support for an :eager_limit_strategy association option, for manual control over how limiting is done (jeremyevans)

* Add Dataset#supports_ordered_distinct_on? for checking if the dataset can use distinct on while respecting order (jeremyevans)

* Add support for the association :limit option when eager loading via .eager for *_many associations (jeremyevans)

* Add db2 jdbc subadapter (jeremyevans)

* Fix the db2 adapter so it actually works (jeremyevans)

* Add ibmdb adapter for accessing DB2 (roylez, jeremyevans) (#376)

* Add much better support for DB2 databases (roylez, jeremyevans) (#376)

* Handle SQL::AliasedExpressions and SQL::JoinClauses in Dataset#select_all (jeremyevans)

* Speed up type translation slightly in mysql, postgres, and sqlite adapters (jeremyevans)

* Add Dataset#supports_cte_in_subqueries? for checking whether database supports WITH in subqueries (jeremyevans)

* Allow Model.set_dataset to accept Sequel::LiteralString arguments as table names (jeremyevans)

* Association :after_load hooks in lazy loading are now called after the associated objects have been cached (jeremyevans)
 
* Emulate handling of extract on MSSQL, using datepart (jeremyevans)

* Emulate handling of extract on SQLite, but you need to set Database#use_timestamp_timezones = false (jeremyevans)

* Abstract handling of ComplexExpressionMethods#extract so that it can work on databases that don't implement extract (jeremyevans)

* Emulate xor operator on SQLite (jeremyevans)

* Add Dataset#supports_where_true? for checking if the database supports WHERE true (or WHERE 1 if 1 is true) (jeremyevans)

* Fix eager loading via eager of one_to_one associations that match multiple associated objects and use order to pick the first one (jeremyevans)

=== 3.27.0 (2011-09-01)

* Add support for native prepared statements to the tinytds adapter (jeremyevans)

* Add support for native prepared statements and stored procedures to the mysql2 adapter (jeremyevans)

* Support dropping primary key, foreign key, and unique constraints on MySQL via the drop_constraint :type option (jeremyevans)

* Add Sequel::SQLTime class for handling SQL time columns (jeremyevans)

* Typecast DateTime objects to Date for date columns (jeremyevans)

* When typecasting Date objects to timestamps, make the resulting objects always have no fractional date components (jeremyevans)

* Add Model.dataset_module for simplifying many def_dataset_method calls (jeremyevans)

* Make prepared_statements_safe plugin work on classes without datasets (jeremyevans)

* Make Dataset#hash work correctly when referencing SQL::Expression instances (jeremyevans)

* Handle allowed mass assignment methods correctly when including modules in classes or extending instances with modules (jeremyevans)

* Fix Model#hash to work correctly with composite primary keys and with no primary key (jeremyevans)

* Model#exists? now returns false without issuing a query for new model objects (jeremyevans)

=== 3.26.0 (2011-08-01)

* Fix bug in default connection pool if a disconnect error is raised and the disconnection_proc also raises an error (jeremyevans)

* Disallow eager loading via eager of many_*_many associations with :eager_graph option (jeremyevans)

* Major speedup in dataset creation (jeremyevans)

* Replace internal implementation of eager_graph with much faster version (jeremyevans)

* Don't treat strings with leading zeros as octal format in the default typecasting (jeremyevans)

* Fix literalization of Date, Time, and DateTime values on Microsoft Access (jeremyevans)

* Fix handling of nil values with the pure-Java version of nokogiri in the xml_serializer plugin (jeremyevans)

* Make identity_map plugin work with standard eager loading of many_to_many and many_through_many associations (jeremyevans)

* Make create_table! only attempt to drop the table if it already exists (jeremyevans)

* Remove custom table_exists? implementations in the oracle and postgres adapters (jeremyevans)

* Handle another type of disconnection in the postgres adapter (jeremyevans)

* Handle disconnections in the ado adapter and do postgres subadapter (jeremyevans)

* Recognize disconnections when issuing BEGIN/ROLLBACK/COMMIT statements (jeremyevans) (#368)

=== 3.25.0 (2011-07-01)

* Work with tiny_tds-0.4.5 in the tinytds adapter, older versions are no longer supported (jeremyevans)

* Make association_pks plugin typecast provided values to integer if the primary key column type is integer (jeremyevans)
 
* Model.set_dataset now accepts Identifier, QualifiedIdentifier, and AliasedExpression arguments (jeremyevans)

* Fix handling of nil values in bound variables and prepared statement and stored procedure arguments in the jdbc adapter (jeremyevans, wei)

* Allow treating Datasets as Expressions, e.g. DB[:table1].select(:column1) > DB[:table2].select(:column2) (jeremyevans)

* No longer use CASCADE by default when dropping tables on PostgreSQL (jeremyevans)

* Support :cascade option to #drop_table, #drop_view, #drop_column, and #drop_constraint for using CASCADE (jeremyevans)

* If validation error messages are LiteralStrings, don't add the column name to them in Errors#full_messages (jeremyevans)

* Fix bug loading plugins on 1.9 where ::ClassMethods, ::InstanceMethods, or ::DatasetMethods is defined (jeremyevans)

* Add Dataset#exclude_where and Dataset#exclude_having methods, so you can force use of having or where clause (jeremyevans)

* Allow Dataset#select_all to take table name arguments and select all columns from each given table (jeremyevans)

* Add Dataset#select_group method, for selecting and grouping on the same columns (jeremyevans)

* Allow Dataset#group and Dataset#group_and_count to accept a virtual row block (jeremyevans)

=== 3.24.1 (2011-06-03)

* Ignore index creation errors if using create_table? with the IF NOT EXISTS syntax (jeremyevans) (#362)

=== 3.24.0 (2011-06-01)

* Add prepared_statements_association plugin, for using prepared statements by default for regular association loading (jeremyevans)

* Add prepared_statements_safe plugin, for making prepared statement use with models more safe (jeremyevans)

* Add prepared_statements_with_pk plugin, for using prepared statements for dataset lookups by primary key (jeremyevans)

* Fix bug in emulated prepared statement support not supporting nil or false as bound values (jeremyevans)

* Add Dataset#unbind for unbinding values from a dataset, for use with creating prepared statements (jeremyevans)

* Add prepared_statements plugin for using prepared statements for updates, inserts, deletes, and lookups by primary key (jeremyevans)

* Make Dataset#[] for model datasets consider a single integer argument as a lookup by primary key (jeremyevans)

* Add Dataset#with_pk for model datasets, for finding first record with matching primary key value (jeremyevans)

* Add defaults_setter plugin for setting default values when initializing model instances (jeremyevans)

* Add around hooks (e.g. around_save) to Sequel::Model (jeremyevans)

* Add Model#initialize_set private method to ease extension writing (jeremyevans)

* Only typecast bit fields to booleans on MSSQL, the MySQL bit type is a bitfield, not a boolean (jeremyevans)

* Set SQL_AUTO_IS_NULL=0 by default when connecting to MySQL via the swift and jdbc adapters (jeremyevans)

* Fix bug in multiple column IN/NOT IN emulation when a model dataset is used (jeremyevans)

* Add support for filtering and excluding by association datasets (jeremyevans)

* Fix literalization of boolean values in filters on SQLite and MSSQL (jeremyevans)

* Add support for filtering and excluding by multiple associations (jeremyevans)

* Add support for inverting some SQL::Constant instances such as TRUE, FALSE, NULL, and NOTNULL (jeremyevans)

* Add support for excluding by associations to model datasets (jeremyevans)

* The Sequel::Postgres.use_iso_date_format setting now only affects future Database objects (jeremyevans)

* Add Sequel::Postgres::PG_NAMED_TYPES hash for extensions to register type conversions for non-standard types (jeremyevans, pvh)

* Make create_table? use IF NOT EXISTS instead of using SELECT to determine existence, if supported (jeremyevans)

* Fix bug in association_pks plugin when associated table has a different primary key column name (jfirebaugh)

* Fix limiting rows when connecting to DB2 (semmons99)

* Exclude columns from tables in the INFORMATION_SCHEMA when parsing table schema on JDBC (jeremyevans)

* Fix limiting rows when connecting to Microsoft Access (jeremyevans)

* Add Database#views for getting an array of symbols of view names for the database (jeremyevans, christian.michon)

* Make Datbase#tables no longer include view names on MySQL (jeremyevans)

* Convert Java CLOB objects to ruby strings when using the JDBC JTDS subadapter (christian.michon)

* If Thread#kill is called on a thread with an open transaction, roll the transaction back on ruby 1.8 and rubinius (jeremyevans)

* Split informix adapter into shared/specific parts, add JDBC informix subadapter (jeremyevans)

=== 3.23.0 (2011-05-02)

* Migrate issue tracker from Google Code to GitHub Issues (jeremyevans)

* Add support for filtering by associations to model datasets (jeremyevans)

* Don't call insert_select when saving a model that doesn't select all columns of the table (jeremyevans)

* Fix bug when using :select=>[] option for a many_to_many association (jeremyevans)

* Add a columns_introspection extension that attempts to skip database queries by introspecting selected columns (jeremyevans)

* When combining old integer migrations and new timestamp migrations, make sure old integer migrations are all applied first (jeremyevans)

* Support dynamic callbacks to customize regular association loading at query time (jeremyevans)

* Support cascading of eager loading with dynamic callbacks for both eager and eager_graph (jeremyevans)

* Make the xml_serializer plugin handle namespaced models by using __ instead of / as a separator (jeremyevans)

* Allow the :eager_grapher association proc to accept a single hash instead of 3 arguments (jfirebaugh)

* Support dynamic callbacks to customize eager loading at query time (jfirebaugh, jeremyevans)

* Fix bug in the identity_map plugin for many_to_one associations when the association reflection hadn't been filled in yet (funny-falcon)

* Add serialization_modification_detection plugin for detecting changes in serialized columns (jeremyevans) (#333)

=== 3.22.0 (2011-04-01)

* Add disconnect detection to tinytds adapter, though correct behavior may require an update to tiny_tds (cult_hero)

* Add Dataset/Database#mssql_unicode_strings accessor when connecting to MSSQL to control string literalization (semmons99, jeremyevans)

* Fix ODBC::Time instance handling in the odbc adapter (jeremyevans)

* Use Sequel.application_timezone when connecting in the oracle adapter to set the connection's session's timezone (jmthomas)

* In the ADO adapter, assume access to SQL Server if a :conn_string option is given that doesn't indicate Access/Jet (damir.si) (#332)

* Use the correct class when loading instances for descendents of model classes that use single table inheritance (jeremyevans)

* Support for COLLATE in column definitions (jfirebaugh)

* Don't use a schema when creating a temporary table (jeremyevans)

* Make migrator work correctly when a default_schema is set (jeremyevans) (#331)

=== 3.21.0 (2011-03-01)

* Make symbol splitting (:table__column___alias) work correctly for identifiers that are not in the \w character class (authorNari)

* Enable row locks in Oracle (authorNari)

* Prefer cover? over include? for validates_includes/validates_inclusion_of (jeremyevans)

* Make using NULL/NOT NULL, DEFAULT, and UNIQUE column options work correctly on H2 and possibly Oracle (jeremyevans)

* Make bin/sequel accept file arguments and work correctly when $stdin is not a tty (jeremyevans)

* Add support for -I and -r options to bin/sequel (jeremyevans)

* Sequel::Model.plugin can now be overridden just like the other Model methods (jeremyevans)

* Add tinytds adapter, the best way to connect to MSSQL from a C based ruby running on *nix (jeremyevans)

* Recognize bigint unsigned as a Bignum type in the schema dumper (gamespy-tech) (#327)

* Add Dataset#calc_found_rows for MySQL datasets (macks)

* Add association_autoreloading plugin for clearing association cache when foreign key value changes (jfirebaugh, jeremyevans)

* Fix join_table on MySQL ignoring the block (jfirebaugh)

* Transfer CTE WITH clauses in subselect to main query when joining on MSSQL (jfirebaugh)

* Make specs support both RSpec 1 and RSpec 2 (jeremyevans)

* Work with ruby-informix versions >= 0.7.3 in the informix adapter (jeremyevans) (#326)

=== 3.20.0 (2011-02-01)

* Allow a :partial option to Database#indexes on MySQL to include partial indexes (roland.swingler) (#324)

* Add a SQLite subadapter to the swift adapter, now that swift supports it (jeremyevans)

* Update swift adapter to support swift 0.8.1, older versions no longer supported (jeremyevans)

* Allow setting arbitrary JDBC properties in the jdbc adapter with the :jdbc_properties option (jeremyevans)

* Use a better error message if a validates_max_length validation is applied to a nil value (jeremyevans) (#322)

* Add some basic Microsoft Access support to the ado adapter, autoincrementing primary keys now work (jeremyevans)

* Make class_table_inheritance plugin handle subclass associations better (jeremyevans) (#320)

=== 3.19.0 (2011-01-03)

* Handle Date and DateTime types in prepared statements when using the jdbc adapter (jeremyevans)

* Handle Date, DateTime, Time, SQL::Blob, true, and false in prepared statements when using the SQLite adapter (jeremyevans)

* Use varbinary(max) instead of image for the generic blob type on MSSQL (jeremyevans)

* Close prepared statements when disconnecting when using SQLite (jeremyevans)

* Allow reflecting on validations in the validation_class_methods plugin (jeremyevans)

* Allow passing a primary key value to the add_* association method (gucki)

* When typecasting model column values, check the classes of the new and existing values (jeremyevans)

* Improve type translation performance in the postgres, mysql, and sqlite adapters by using methods instead of procs (jeremyevans)

=== 3.18.0 (2010-12-01)

* Allow the user to control how the connection pool deals with attempts to access shards that aren't configured (jeremyevans)

* Typecast columns when creating model objects from JSON in the json_serializer plugin (jeremyevans)

* When parsing the schema for a model that uses an aliased table, use the unaliased table name (jeremyevans)

* When emulating schema methods such as drop_column on SQLite, recreate applicable indexes on the recreated table (jeremyevans)

* Only remove hook pairs that have been run successfully in the instance_hooks plugin (jeremyevans)

* Add reversible migration support to the migration extension (jeremyevans)

* Add to_dot extension, for producing visualizations of Dataset abstract syntax trees with Graphviz (jeremyevans)

* Switch to using manual type translation in the SQLite adapter (jeremyevans)

* Support :read_timeout option in the native mysql adapter (tmm1)

* Support :connect_timeout option in the native mysql and mysql2 adapters (tmm1)

=== 3.17.0 (2010-11-05)

* Ensure that the optimistic locking plugin increments the lock column when using Model#modified! (jfirebaugh)

* Correctly handle nil values in the xml_serializer plugin, instead of converting them to empty strings (george.haff) (#313)

* Use a default wait_timeout that's allowed on Windows for the mysql and mysql2 adapters (jeremyevans) (#314)

* Add support for connecting to MySQL over SSL using the :sslca, :sslkey, and related options (jeremyevans)

* Fix Database#each_server when used with jdbc or do connection strings without separate :adapter option (jeremyevans) (#312)

* Much better support in the AS400 JDBC subadapter (bhauff)

* Allow cloning of many_through_many associations (gucki, jeremyevans)

* In the nested_attributes plugin, don't make unnecessary update calls to modify associated objects that are about to be deleted (jeremyevans, gucki)

* Allow Dataset#(add|set)_graph_aliases to accept as hash values symbols and arrays with a single element (jeremyevans)

* Add Databse#views and #view_exists? to the Oracle adapter (gpheruson)

* Add Database#sql_log_level for changing the level at which SQL queries are logged (jeremyevans)

* Remove unintended use of prepared statements in swift adapter (jeremyevans)

* Fix logging in the swift PostgreSQL subadapter (jeremyevans)

=== 3.16.0 (2010-10-01)

* Support composite foreign keys for associations in the identity_map plugin (harukizaemon, jeremyevans) (#310)

* Handle INTERSECT and EXCEPT on Microsoft SQL Server 2005+ (jfirebaugh)

* Add :replace option to Database#create_language in the postgresql adapter (jeremyevans)

* Make rcte_tree plugin work when not all columns are selected (jeremyevans)

* Add swift adapter (jeremyevans)

* Fix literalization of DateTime objects on 1.9 for databases that support fractional seconds (jeremyevans)

=== 3.15.0 (2010-09-01)

* Make emulated alter_table tasks on SQLite correctly preserve foreign keys (DirtYiCE, jeremyevans)

* Add support for sequel_pg to the native postgres adapter when pg is used (jeremyevans)

* Make class MyModel < Sequel::Model(DB[:table]) reload safe (jeremyevans)

* Fix a possible error when using the do (DataObjects) adapter with postgres (jeremyevans)

* Handle a many_to_many :join_table option that uses an implicit alias (mluu, jeremyevans)

* Work around bug in Microsoft's SQL Server JDBC Adapter version 3.0 (jfirebaugh)

* Make eager graphing a model that uses an aliased table name work correctly (jeremyevans)

* Make class_table_inheritance plugin work with non integer primary keys on SQLite (jeremyevans, russm)

* Add :auto_increment field to column schema values on MySQL if the column is auto incrementing (dbd)

* Handle DSN-less ODBC connections better (Ricardo Ramalho)

* Exclude temporary tables when parsing the schema on PostgreSQL (jeremyevans) (#306)

* Add Mysql2 adapter (brianmario)

* Handle Mysql::Error exceptions when disconnecting in the MySQL adapter (jeremyevans)

* Make typecasting work correctly for attributes loaded lazily when using the lazy attributes plugin (jeremyevans)

=== 3.14.0 (2010-08-02)

* Handle OCIInvalidHandle errors when disconnecting in the Oracle adapter (jeremyevans)

* Allow calling Model.create_table, .create_table! and .create_table? with blocks containing the schema in the schema plugin (jfirebaugh)

* Fix handling of a :conditions options in the rcte plugin (mluu)

* Fix aggregate methods such as Dataset#sum and #avg on MSSQL on datasets with an order but no limit (mluu)

* Fix rename_table on MSSQL for case sensitive collations and schemas (mluu)

* Add a :single_root option to the tree plugin, for enforcing a single root value via a before_save hook (jfirebaugh)

* Add a Model#root? method to the tree plugin, for checking if the current node is a root (jfirebaugh)

* Add a :raise_on_failure option to Model#save to override the raise_on_save_failure setting (jfirebaugh)

* Handle class discriminator column names that are existing ruby method names in the single table inheritance plugin (jeremyevans)

* Fix times and datetimes when timezone support is used and you are loading a standard time when in daylight time or vice versa (gcampbell)

* Handle literalization of OCI8::CLOB objects in the native oracle adapter (jeremyevans)

* Raise a Sequel::Error instead of an ArgumentError if the migration current or target version does not exist (jeremyevans)

* Fix Database#schema on Oracle when the same table exists in multiple schemas (djwhitt)

* Fix Database#each_server when using a connection string to connect (jeremyevans)

* Make Model dataset's destroy method respect the model's use_transactions setting, instead of always using a transaction (jeremyevans)

* Add Database#adapter_scheme, for checking which adapter a Database uses (jeremyevans)

* Allow Dataset#grep to take :all_patterns, :all_columns, and :case_insensitive options (mighub, jeremyevans)

=== 3.13.0 (2010-07-01)

* Allow Model.find_or_create to take a block which is yielded the object to be created, if no object is found (zaius, jeremyevans)

* Make PlaceholderLiteralString a GenericExpression subclass (jeremyevans)

* Allow nil/NULL to be used as a CASE expression value (jeremyevans)

* Support bitwise operators on more databases (jeremyevans)

* Make PostgreSQL do bitwise xor instead of exponentiation for ^ operator (jeremyevans)

* Fix handling of tinyint(1) columns when connecting to MySQL via JDBC (jeremyevans)

* Handle arrays of two element arrays as filter hash values automatically (jeremyevans)

* Allow :frame option for windows to take a string that is used literally (jeremyevans)

* Support transaction isolation levels on PostgreSQL, MySQL, and MSSQL (jeremyevans)

* Support prepared transactions/two-phase commit on PostgreSQL, MySQL, and H2 (jeremyevans)

* Allow NULLS FIRST/LAST when ordering using the :nulls=>:first/:last option to asc and desc (jeremyevans)

* On PostgreSQL, if no :schema option is provided for #tables, #table_exists?, or #schema, assume all schemas except the default non-public ones (jeremyevans) (#305)

* Cache prepared statements when using the native sqlite driver, improving performance (jeremyevans)

* Add a Tree plugin for treating model objects as being part of a tree (jeremyevans, mwlang)

* Add a :methods_module association option, for choosing the module into which association methods are placed (jeremyevans)

* Add a List plugin for treating model objects as being part of a list (jeremyevans, aemadrid)

* Don't attempt to use class polymorphism in the class_table_inheritance plugin if no cti_key is defined (jeremyevans)

* Add a XmlSerializer plugin for serializing/deserializing model objects to/from XML (jeremyevans)

* Add a JsonSerializer plugin for serializing/deserializing model objects to/from JSON (jeremyevans)

* Handle unsigned integers in the schema dumper (jeremyevans)

=== 3.12.1 (2010-06-09)

* Make :encoding option work on MySQL even if config file specifies different encoding (jeremyevans) (#300)

=== 3.12.0 (2010-06-01)

* Add a :deferrable option to foreign_key for creating deferrable foreign keys (hydrow)

* Add a :join_table_block many_to_many association option used by the add/remove/remove_all methods (jeremyevans)

* Add an AssociationPks plugin that adds association_pks and association_pks= methods for *_to_many associations (jeremyevans)

* Add an UpdatePrimaryKey plugin that allows you to update the primary key of a model object (jeremyevans)

* Add a SkipCreateRefresh plugin that skips the refresh when saving new model objects (jeremyevans)

* Add a StringStripper plugin that strips strings before assigning them to model attributes (jeremyevans)

* Allow the :eager_loader association proc to accept a single hash instead of 3 arguments (jeremyevans)

* Add a Dataset#order_append alias for order_more, for consistency with order_prepend (jeremyevans)

* Add a Dataset#order_prepend method that adds to the end of an existing order (jeremyevans)

* Add a Sequel::NotImplemented exception class, use instead of NotImplementedError (jeremyevans)

* Correctly handle more than 2 hierarchy levels in the single table inheritance plugin (jeremyevans)

* Allow using a custom column value<->class mapping to the single_table_inheritance plugin (jeremyevans, tmm1)

* Handle SQL::Identifiers in the schema_dumper extension (jeremyevans) (#304)

* Make sure certain alter table operations clear the schema correctly on MySQL (jeremyevans) (#301)

* Fix leak of JDBC Statement objects when using transactions on JDBC on databases that support savepoints (jeremyevans)

* Add DatabaseDisconnectError support to the ODBC adapter (Joshua Hansen)

* Make :encoding option work on MySQL in some cases where it was ignored (jeremyevans) (#300)

* Make Model::Errors#on always return nil if there are no errors on that attribute (jeremyevans)

* When using multiple plugins that add before hooks, the order that the hooks are called may have changed (jeremyevans)

* The hook_class_methods plugin no longer skips later after hooks if earlier after hooks return false (jeremyevans)

* Add Model#set_fields and update_fields, similar to set_only and update_only but ignoring other keys in the hash (jeremyevans)

* Add Model.qualified_primary_key_hash, similar to primary_key_hash but with qualified columns (jeremyevans)

* Make Model::Errors#empty? handle attributes with empty error arrays (jeremyevans)

* No longer apply association options to join table dataset when removing all many_to_many associated objects (jeremyevans)

* Log the execution times of migrations to the database's loggers (jeremyevans)

* Add a TimestampMigrator that can work with migrations where versions are timestamps, and handle migrations applied out of order (jeremyevans)

* Completely refactor Sequel::Migrator, now a class instead of a module (jeremyevans)

* Save migration version after each migration, instead of after all migrations (jeremyevans)

* Raise an error if missing a migration version (jeremyevans)

* Raise an error if using a duplicate migration version (jeremyevans)

* Add a Sequel.migration DSL for defining migrations (jeremyevans)

* Add a sharding plugin giving Sequel::Model objects support for dealing with sharding (jeremyevans)

* Handle timestamp(N) with time zone data types (hone)

* Fix MSSQL temporary table creation, but watch out as it changes the table name (gpd, jeremyevans) (#299)

=== 3.11.0 (2010-05-03)

* Allow shared postgresql adapter to work with ruby 1.9 with the -Ku switch (golubev.pavel) (#298)

* Add support for connecting to MSSQL via JTDS in the JDBC adapter (jeremyevans)

* Support returning the number of rows updated/deleted on MSSQL when using the ADO adapter with an explicit :provider (jeremyevans)

* Support transactions in the ADO adapter if not using the default :provider (jeremyevans)

* Make Database#disconnect not raise an exception when using the unsharded single connection pool (jeremyevans)

* Attempt to handle JDBC connection problems in cases where driver auto loading doesn't work (e.g. Tomcat) (elskwid)

* Make native MySQL adapter's tinyint to boolean conversion only convert tinyint(1) columns and not larger tinyint columns (roland.swingler) (#294)

* Fix use of limit with distinct on Microsoft SQL Server (jeremyevans) (#297)

* Correctly swallow errors when using :ignore_index_errors in Database#create_table when using unsupported indexes (jeremyevans) (#295)

* Fix insert returning the autogenerated key when using the 5.1.12 MySQL JDBC driver (viking)

* Consider number/numeric/decimal columns with a 0 scale to be integer columns (e.g. numeric(10, 0)) (jeremyevans, QaDes)

* Fix Database#rename_table on Microsoft SQL Server (rohit.namjoshi) (#293)

* Add Dataset#provides_accurate_rows_matched?, for seeing if update and delete are likely to return correct numbers (jeremyevans)

* Add require_modification to Sequel::Model, for checking that model instance updating and deleting affects a single row (jeremyevans)

* Fix leak of ResultSets when getting metadata in the jdbc adapter (jrun)

* Make Dataset#filter and related methods just clone receiver if given an empty argument, such as {}, [], or '' (jeremyevans)

* Add instance_filters plugin, for adding arbitrary filters when updating/destroying the instance (jeremyevans)

* No longer create the #{plugin}_opts methods for plugins (jeremyevans)

* Support :auto_vacuum, :foreign_keys, :synchronous, and :temp_store Database options on SQLite, for thread-safe PRAGMA setting (jeremyevans)

* Add foreign_keys accessor to SQLite Database objects (enabled by default), which modifies the foreign_keys PRAGMA available in 3.6.19+ (jeremyevans)

* Add an Database#sqlite_version method when connecting to SQLite, used to determine feature support (jeremyevans)

* Fix rolling back transactions when connecting to Oracle via JDBC (jeremyevans)

* Fix syntax errors when connecting to MSSQL via the dbi adapter (jeremyevans) (#292)

* Add support for an :after_connect option when connection, called with each new connection made (jeremyevans)

* Add support for a :test option when connecting to be automatically test the connection (jeremyevans)

* Add Dataset#select_append, which always appends to the existing SELECTed columns (jeremyevans)

* Emulate DISTINCT ON on MySQL using GROUP BY (jeremyevans)

* Make MSSQL shared adapter emulate set_column_null alter table op better with types containing sizes (jeremyevans) (#291)

* Add :config_default_group and :config_local_infile options to the native MySQL adapter (jeremyevans)

* Add log_warn_duration attribute to Database, queries that take longer than it will be logged at warn level (jeremyevans)

* Switch Database logging to use log_yield instead of log_info, queries that raise errors are now logged at error level (jeremyevans)

* Update active_model plugin to work with the ActiveModel::Lint 3.0.0beta2 specs (jeremyevans)

* Support JNDI connection strings in the JDBC adapter (jrun)

=== 3.10.0 (2010-04-02)

* Make one_to_one setter and *_to_many remove_all methods apply the association options (jeremyevans)

* Make nested_attributes plugin handle invalid many_to_one associations better (john_firebaugh)

* Remove private methods from Sequel::BasicObject on ruby 1.8 (i.e. most Kernel methods) (jeremyevans)

* Add Sequel::BasicObject.remove_methods!, useful on 1.8 if libraries required after Sequel add methods to Object (jeremyevans)

* Change Sequel.connect with a block to return the block's value (jonas11235)

* Add an rcte_tree plugin, which uses recursive common table expressions for loading trees stored as adjacency lists (jeremyevans)

* Make typecast_on_load plugin also typecast when refreshing the object (either explicitly or implicitly after creation) (jeremyevans)

* Fix schema parsing and dumping of tinyint columns when connecting to MySQL via the do adapter (ricardochimal)

* Fix transactions when connecting to Oracle via JDBC (jeremyevans)

* Fix plugin loading when plugin module name is the same as an already defined top level constant (jeremyevans)

* Add an AS400 JDBC subadapter (need jt400.jar in classpath) (jeremyevans, bhauff)

* Fix the emulated MSSQL offset support when core extensions are not used (jeremyevans)

* Make Sequel::BasicObject work correctly on Rubinius (kronos)

* Add the :eager_loader_key option to associations, useful for custom eager loaders (jeremyevans)

* Dataset#group_and_count no longer orders by the count (jeremyevans)

* Fix Dataset#limit on MSSQL 2000 (jeremyevans)

* Support eagerly load nested associations when lazily loading *_to_one associations using the :eager option (jeremyevans)

* Fix the one_to_one setter to work with a nil argument (jeremyevans)

* Cache one_to_one associations like many_to_one associations instead of one_to_many associations (jeremyevans)

* Use the singular form for one_to_one association names instead of the plural form (john_firebaugh)

* Add real one_to_one associations, using the :one_to_one option of one_to_many is now an error (jeremyevans)

* Add Model#lock! which uses Dataset#for_update to lock model rows (jeremyevans)

* Add Dataset#for_update as a standard dataset method (jeremyevans)

* Add composition plugin, simlar to ActiveRecord's composed_of (jeremyevans)

* Combine multiple complex expressions for simpler SQL and object tree (jeremyevans)

* Add Dataset#first_source_table, for the unaliased version of the table for the first source (jeremyevans)

* Raise a more explicit error if attempting to use the sqlite adapter with sqlite3 instead of sqlite3-ruby (jeremyevans)

=== 3.9.0 (2010-03-04)

* Allow loading adapters and extensions from outside of the Sequel lib directory (jeremyevans)

* Make limit and offset work as bound variables in prepared statements (jeremyevans)

* In the single_table_inheritance plugin, handle case where the sti_key is nil or '' specially (jeremyevans) (#287)

* Handle IN/NOT IN with an empty array (jeremyevans)

* Emulate IN/NOT IN with multiple columns where the database doesn't support it and a dataset is given (jeremyevans)

* Add Dataset#unused_table_alias, for generating a table alias that has not yet been used in the query (jeremyevans)

* Support an empty database argument in bin/sequel, useful for testing things without a real database (jeremyevans)

* Support for schemas and aliases when eager graphing (jeremyevans)

* Handle using an SQL::Identifier as an 4th option to Dataset#join_table (jeremyevans)

* Move gem spec from Rakefile to a .gemspec file, for compatibility with gem build and builder (jeremyevans) (#285)

* Fix MSSQL 2005+ offset emulation on ruby 1.9 (jeremyevans)

* Make active_model plugin work with ActiveModel 3.0 beta Lint specs, now requires active_model (jeremyevans)

* Correctly create foreign key constraints on MySQL with the InnoDB engine, but you must specify the :key option (jeremyevans)

* Add an optimistic_locking plugin for models, similar to ActiveRecord's optimistic locking support (jeremyevans)

* Handle implicitly qualified symbols in UPDATE statements, useful for updating joined datasets (jeremyevans)

* Have schema_dumper extension pass options hash to Database#tables (jeremyevans) (#283)

* Make all internal uses of require thread-safe (jeremyevans)

* Refactor connection pool into 4 separate pools, increase performance for unsharded setups (jeremyevans)

* Change a couple instance_evaled lambdas into procs, for 1.9.2 compatibility (jeremyevans)

* Raise error message earlier if DISTINCT ON is used on SQLite (jeremyevans)

* Speed up prepared statements on SQLite (jeremyevans)

* Correctly handle ODBC timestamps when database_timezone is nil (jeremyevans)

* Add Sequel::ValidationFailed#errors (tmm1)

=== 3.8.0 (2010-01-04)

* Catch cases in the postgres adapter where exceptions weren't converted or raised appropriately (jeremyevans)

* Don't double escape backslashes in string literals in the mssql shared adapter (john_firebaugh)

* Fix order of ORDER and HAVING clauses in the mssql shared adapter (mluu)

* Add validates_type to the validation_helpers plugin (mluu)

* Attempt to detect database disconnects in the JDBC adapter (john_firebaugh)

* Add Sequel::SQL::Expression#==, so arbtirary expressions can be compared by value (dlee)

* Respect the :size option for the generic File type on MySQL to create tinyblob, mediumblob, and longblob (ibc)

* Don't use the OUTPUT clause on SQL Server versions that don't support it (pre-2005) (jeremyevans) (#281)

* Raise DatabaseConnectionErrors in the single-threaded connection pool if unable to connect (jeremyevans)

* Fix handling of non-existent server in single-threaded connection pool (jeremyevans)

* Default to using mysqlplus driver in the native mysql adapter, fall back to mysql driver (ibc, jeremyevans)

* Handle 64-bit integers in JDBC prepared statements (paulfras)

* Improve blob support when using the H2 JDBC subadapter (nullstyle, jeremyevans, paulfras)

* Add Database#each_server, which yields a new Database object for each server in the connection pool which is connected to only that server (jeremyevans)

* Add Dataset#each_server, which yields a dataset for each server in the connection pool which is will execute on that server (jeremyevans)

* Remove meta_eval and metaclass private methods from Sequel::Metaprogramming (jeremyevans)

* Merge Dataset::FROM_SELF_KEEP_OPTS into Dataset::NON_SQL_OPTIONS (jeremyevans)

* Add Database#remove_servers for removing servers from the pool on the fly (jeremyevans)

* When disconnecting servers, if there are any connections to the server currently in use, schedule them to be disconnected (jeremyevans)

* Allow disconnecting specific server(s)/shard(s) in Database#disconnect via a :servers option (jeremyevans)

* Handle multiple statements in a single query in the native MySQL adapter in all cases, not just when selecting via Dataset#each (jeremyevans)

* In the boolean_readers plugin, don't raise an error if the model's columns can't be determined (jeremyevans)

* In the identity_map plugin, remove instances from the cache if they are deleted/destroyed (jeremyevans)

* Add Database#add_servers, for adding new servers/shards on the fly (chuckremes, jeremyevans)

=== 3.7.0 (2009-12-01)

* Add Dataset#sequence to the shared Oracle Adapter, for returning autogenerated primary key values on insert (jeremyevans) (#280)

* Bring support for modifying joined datasets into Sequel proper, supported on MySQL and PostgreSQL (jeremyevans)

* No longer use native autoreconnection in the mysql adapter (jeremyevans)

* Add NULL, NOTNULL, TRUE, SQLTRUE, FALSE, and SQLFALSE constants (jeremyevans)

* Add Dataset #select_map, #select_order_map, and #select_hash (jeremyevans)

* Make Dataset#group_and_count handle arguments other than Symbols (jeremyevans)

* Add :only_if_modified option to validates_unique method in validation_helpers plugin (jeremyevans)

* Allow specifying the dataset alias via :alias option when using union/intersect/except (jeremyevans)

* Allow Model#destroy to take an options hash and respect a :transaction option (john_firebaugh)

* If a transaction is being used, raise_on_save_failure is false, and a before hook returns false, rollback the transaction (john_firebaugh, jeremyevans)

* In the schema_dumper, explicitly specify the :type option if it isn't Integer (jeremyevans)

* On postgres, use bigserial type if :type=>Bignum is given as an option to primary_key (jeremyevans)

* Use READ_DEFAULT_GROUP in the mysql adapter to load the options in the client section of the my.cnf file (crohr)

=== 3.6.0 (2009-11-02)

* Make the MSSQL shared adapter correctly parse the column schema information for tables in the non-default database schema (rohit.namjoshi)

* Use save_changes instead of save when updating existing associated objects in the nested_attributes plugin (jeremyevans)

* Allow Model#save_changes to accept an option hash that is passed to save, so you can save changes without validating (jeremyevans)

* Make nested_attributes plugin add newly created objects to cached association array immediately (jeremyevans)

* Make add_ association method not add the associated object to the cached array if it's already there (jeremyevans)

* Add Model#modified! for explicitly marking an object as modified, so save_changes/update will run callbacks even if no columns have been modified (jeremyevans)
 
* Add support for a :fields option in the nested attributes plugin, and only allow updating of the fields specified (jeremyevans)

* Don't allow modifying keys related to the association when updating existing objects in the nested_attributes plugin (jeremyevans)

* Add associated_object_keys method to AssociationReflection objects, specifying the key(s) in the associated model table related to the association (jeremyevans)

* Support the memcached protocol in the caching plugin via the new :ignore_exceptions option (EppO, jeremyevans)

* Don't modify array with a string and placeholders passed to Dataset#filter or related methods (jeremyevans)

* Speed up Amalgalite adapter (copiousfreetime)

* Fix bound variables on PostgreSQL when using nil and potentially other values (jeremyevans)

* Allow easier overriding of default options used in the validation_helpers plugin (jeremyevans)

* Have Dataset#literal_other call sql_literal on the object if it responds to it (heda, michaeldiamond)

* Fix Dataset#explain in the amalgalite adapter (jeremyevans)

* Have Model.table_name respect table aliases (jeremyevans)

* Allow marshalling of saved model records after calling #marshallable! (jeremyevans)

* one_to_many association methods now make sure that the removed object is currently associated to the receiver (jeremyevans)

* Model association add_ and remove_ methods now have more descriptive error messages (jeremyevans)

* Model association add_ and remove_ methods now make sure passed object is of the correct class (jeremyevans)

* Model association remove_ methods now accept a primary key value and disassociate the associated model object (natewiger, jeremyevans)

* Model association add_ methods now accept a hash and create a new associated model object (natewiger, jeremyevans)

* Dataset#window for PostgreSQL datasets now respects previous windows (jeremyevans)

* Dataset#simple_select_all? now ignores options that don't affect the SQL being issued (jeremyevans)

* Account for table aliases in eager_graph (mluu)

* Add support for MSSQL clustered index creation (mluu)

* Implement insert_select in the MSSQL adapter via OUTPUT. Can be disabled via disable_insert_output. (jfirebaugh, mluu)

* Correct error handling when beginning a transaction fails (jfirebaugh, mluu)

* Correct JDBC binding for Time objects in prepared statements (jfirebaugh, jeremyevans)

* Emulate JOIN USING clause poorly using JOIN ON if the database doesn't support JOIN USING (e.g. MSSQL, H2) (jfirebaugh, jeremyevans)

* Support column aliases in Dataset#group_and_count (jfirebaugh)

* Support preparing insert statements of the form insert(1,2,3) and insert(columns, values) (jfirebaugh)

* Fix add_index for tables in non-default schema (jfirebaugh)

* Allow named placeholders in placeholder literal strings (jeremyevans)

* Allow the force_encoding plugin to work when refreshing (jeremyevans)

* Add Dataset#bind for setting bound variable values before calling #call (jeremyevans)

* Add additional join methods to Dataset: (cross|natural|(natural_)?(full|left|right))_join (jeremyevans)

* Fix use a dataset aggregate methods (e.g. sum) on limited/grouped/etc. datasets (jeremyevans)

* Clear changed_columns when saving new model objects with a database adapter that supports insert_select, such as postgres (jeremyevans)

* Fix Dataset#replace with default values on MySQL, and respect insert-related options (jeremyevans)

* Fix Dataset#lock on PostgreSQL (jeremyevans)

* Fix Dataset#explain on SQLite (jeremyevans)

* Add Dataset#use_cursor to the native postgres adapter, for processing large datasets (jeremyevans)

* Don't ignore Class.inherited in Sequel::Model.inherited (antage) (#277)

* Optimize JDBC::MySQL::DatabaseMethods#last_insert_id to prevent additional queries (tmm1)

* Fix use of MSSQL with ruby 1.9 (cult hero)

* Don't try to load associated objects when the current object has NULL for one of the key fields (jeremyevans)

* No longer require GROUP BY to use HAVING, except on SQLite (jeremyevans)

* Add emulated support for the lack of multiple column IN/NOT IN support in MSSQL and SQLite (jeremyevans)

* Add emulated support for #ilike on MSSQL and H2 (jeremyevans)

* Add a :distinct option for all associations, which uses the SQL DISTINCT clause (jeremyevans)

* Don't require :: prefix for constant lookups in instance_evaled virtual row blocks on ruby 1.9 (jeremyevans)

=== 3.5.0 (2009-10-01)

* Correctly literalize timezones in timestamps when using Oracle (jeremyevans)

* Add class_table_inheritance plugin, supporting inheritance in the database using a table-per-model-class approach (jeremyevans)

* Allow easier overriding of model code to insert and update individual records (jeremyevans)

* Allow graphing to work on previously joined datasets, and eager graphing of models backed by joined datasets (jeremyevans)

* Fix MSSQL emulated offset support for datasets with row_procs (e.g. Model datasets) (jeremyevans)

* Support composite keys with set_primary_key when called with an array of multiple symbols (jeremyevans)

* Fix select_more and order_more to not affect receiver (tamas.denes, jeremyevans)

* Support composite keys in model associations, including many_through_many plugin support (jeremyevans)

* Add the force_encoding plugin for forcing encoding of strings for models (requires ruby 1.9) (jeremyevans)

* Support DataObjects 0.10 (previous DataObjects versions are now unsupported) (jeremyevans)

* Allow the user to specify the ADO connection string via the :conn_string option (jeremyevans)

* Add thread_local_timezones extension for allow per-thread overrides of the global timezone settings (jeremyevans)

* Add named_timezones extension for using named timezones such as "America/Los_Angeles" using TZInfo (jeremyevans)

* Pass through unsigned/elements/size and other options when altering columns on MySQL (tmm1)

* Replace Dataset#virtual_row_block_call with Sequel.virtual_row (jeremyevans)

* Allow Dataset #delete, #update, and #insert to respect existing WITH clauses on MSSQL (dlee, jeremyevans)

* Add touch plugin, which adds Model#touch for updating an instance's timestamp, as well as touching associations when an instance is updated or destroyed (jeremyevans)

* Add sql_expr extension, which adds the sql_expr to all objects, giving them easy access to Sequel's DSL (jeremyevans)

* Add active_model plugin, which gives Sequel::Model an ActiveModel compliant API, passes the ActiveModel::Lint tests (jeremyevans)

* Fix MySQL commands out of sync error when using queries with multiple result sets without retrieving all result sets (jeremyevans)

* Allow splitting of multiple result sets into separate arrays when using multiple statements in a single query in the native MySQL adapter (jeremyevans)

* Don't include primary key indexes when parsing MSSQL indexes on JDBC (jeremyevans)

* Make Dataset#insert_select return nil on PostgreSQL if disable_insert_returning is used (jeremyevans)

* Speed up execution of prepared statements with bound variables on MySQL (ibc@aliax.net)
 
* Add association_dependencies plugin, for deleting, destroying, or nullifying associated objects when destroying a model object (jeremyevans)

* Add :validate association option, set to false to not validate when implicitly saving associated objects (jeremyevans)

* Add subclasses plugin, for recording all of a models subclasses and descendent classes (jeremyevans)

* Add looser_typecasting extension, for using .to_f and .to_i instead of Kernel.Float and Kernel.Integer when typecasting floats and integers (jeremyevans)

* Catch database errors when preparing statements or setting variable values when using the native MySQL adapter (jeremyevans)

* Add typecast_on_load plugin, for fixing bad database typecasting when loading model objects (jeremyevans)

* Detect more types of MySQL disconnection errors (jeremyevans)

* Add Sequel.convert_exception_class for wrapping exceptions (jeremyevans)

* Model#modified? now always considers new records as modified (jeremyevans)

* Typecast before checking current model attribute value, instead of after (jeremyevans)

* Don't attempt to use unparseable defaults as literals when dumping the schema for a MySQL database (jeremyevans)

* Handle MySQL enum defaults in the schema dumper (jeremyevans)

* Support Database#server_version on MSSQL (dlee, jeremyevans)

* Support updating and deleting joined datasets on MSSQL (jfirebaugh)

* Support the OUTPUT SQL clause on MSSQL delete, insert, and update statements (jfirebaugh)

* Refactor generation of delete, insert, select, and update statements (jfirebaugh, jeremyevans)

* Do a better job of parsing defaults on MSSQL (jfirebaugh)

=== 3.4.0 (2009-09-02)

* Allow datasets without tables to work correctly on Oracle (mikegolod)

* Add #invert, #asc, and #desc to OrderedExpression (dlee)

* Allow validates_unique to take a block used to scope the uniqueness constraint (drfreeze, jeremyevans)

* Automatically save a new many_to_many associated object when associating the object via add_* (jeremyevans)

* Add a nested_attributes plugin for modifying associated objects directly through a model object (jeremyevans)

* Add an instance_hooks plugin for adding hooks to specific model instances (jeremyevans)

* Add a boolean_readers plugin for creating attribute? methods for boolean columns (jeremyevans)

* Add Dataset#ungrouped which removes existing grouping (jeremyevans)

* Make Dataset#group with nil or no arguments to remove existing grouping (dlee)

* Fix using multiple emulated ALTER TABLE statements (e.g. drop_column) in a single alter_table block on SQLite (jeremyevans)

* Don't allow inserting on a grouped dataset or a dataset that selects from multiple tables (jeremyevans)

* Allow class Item < Sequel::Model(DB2) to work (jeremyevans)

* Add Dataset#truncate for truncating tables (jeremyevans)

* Add Database#run method for executing arbitrary SQL on a database (jeremyevans)

* Handle index parsing correctly for tables in a non-default schema on JDBC (jfirebaugh)

* Handle unique index parsing correctly when connecting to MSSQL via JDBC (jfirebaugh)

* Add support for converting Time/DateTime to local or UTC time upon storage, retrieval, or typecasting (jeremyevans)

* Accept a hash when typecasting values to date, time, and datetime types (jeremyevans)

* Make JDBC adapter prepared statements support booleans, blobs, and potentially any type of object (jfirebaugh)

* Refactor the inflection support and modify the default inflections (jeremyevans, dlee)

* Make the serialization and lazy_attribute plugins add accessor methods to modules included in the class (jeremyevans)

* Make Database#schema on JDBC include a :column_size entry specifying the maximum length/precision for the column (jfirebaugh)

* Make Database#schema on JDBC accept a :schema option (dlee)

* Fix Dataset#import when called with a dataset (jeremyevans)

* Give a much more descriptive error message if the mysql.rb driver is detected (jeremyevans)

* Make postgres adapter work with a modified postgres-pr that raises PGError (jeremyevans)

* Make ODBC adapter respect Sequel.datetime_class (jeremyevans)

* Add support for generic concepts of CURRENT_{DATE,TIME,TIMESTAMP} (jeremyevans)

* Add a timestamps plugin for automatically creating hooks for create and update timestamps (jeremyevans)

* Add support for serializing to json (derdewey)

=== 3.3.0 (2009-08-03)

* Add an assocation_proxies plugin that uses proxies for associations (jeremyevans)

* Have the add/remove/remove_all methods take additional arguments and pass them to the internal methods (clivecrous)

* Move convert_tinyint_to_bool method from Sequel to Sequel::MySQL (jeremyevans)

* Model associations now default to associating to classes in the same scope (jeremyevans, nougad) (#274)

* Add Dataset#unlimited, similar to unfiltered and unordered (jeremyevans)

* Make Dataset#from_self take an options hash and respect an :alias option, giving the alias to use (Phrogz)

* Make the JDBC adapter accept a :convert_types option to turn off Java type conversion and double performance (jeremyevans)

* Slight increase in ConnectionPool performance (jeremyevans)

* SQL::WindowFunction can now be aliased/casted etc. just like SQL::Function (jeremyevans)

* Model#save no longer attempts to update primary key columns (jeremyevans)

* Sequel will now unescape values provided in connection strings (e.g. ado:///db?host=server%5cinstance) (jeremyevans)

* Significant improvements to the ODBC and ADO adapters in general (jeremyevans)

* The ADO adapter no longer attempts to use database transactions, since they never worked (jeremyevans)

* Much better support for Microsoft SQL Server using the ADO, ODBC, and JDBC adapters (jeremyevans)

* Support rename_column, set_column_null, set_column_type, and add_foreign_key on H2 (jeremyevans)

* Support adding a column with a primary key or unique constraint to an existing table on SQLite (jeremyevans)

* Support altering a column's type, null status, or default on SQLite (jeremyevans)

* Fix renaming a NOT NULL column without a default on MySQL (nougad, jeremyevans) (#273)

* Don't swallow DatabaseConnectionErrors when creating model subclasses (tommy.midttveit)

=== 3.2.0 (2009-07-02)

* In the STI plugin, don't overwrite the STI field if it is already set (jeremyevans)

* Add support for Common Table Expressions, which use the SQL WITH clause (jeremyevans)

* Add SQL::WindowFunction, expand virtual row blocks to support them and other constructions (jeremyevans)

* Add Model#autoincrementing_primary_key, for when the autoincrementing key isn't the same as the primary key (jeremyevans)

* Add Dataset#ungraphed, to remove the splitting of results into subhashes or associated records (jeremyevans)
 
* Support :opclass option for PostgreSQL indexes (tmi, jeremyevans)

* Make parsing of server's version more reliable for PostgreSQL (jeremyevans)

* Add Dataset#qualify, which is qualify_to with a first_source default (jeremyevans)

* Add :ruby_default to parsed schema information, which contains a ruby object representing the database default (jeremyevans)

* Fix changing a column's name, type, or null status on MySQL when column has a string default (jeremyevans)

* Remove Dataset#to_table_reference protected method, no longer used (jeremyevans)

* Fix thread-safety issue in stored procedure code (jeremyevans)

* Remove SavepointTransactions module, integrate into Database code (jeremyevans)

* Add supports_distinct_on? method (jeremyevans)

* Remove SQLStandardDateFormat, replace with requires_sql_standard_datetimes? method (jeremyevans)

* Remove UnsupportedIsTrue module, replace with supports_is_true? method (jeremyevans)

* Remove UnsupportedIntersectExcept(All)? modules, replace with methods (jeremyevans)

* Make Database#indexes work on PostgreSQL versions prior to 8.3 (tested on 7.4) (jeremyevans)

* Fix bin/sequel using a YAML file on 1.9 (jeremyevans)

* Allow connection pool options to be specified in connection string (jeremyevans)

* Handle :user and :password options in the JDBC adapter (jeremyevans)

* Fix warnings when using the ODBC adapter (jeremyevans)

* Add opening_databases.rdoc file for describing how to connect to a database (mwlang, jeremyevans)

* Significantly increase JDBC select performance (jeremyevans)

* Slightly increase SQLite select performance using the native adapter (jeremyevans)

* Majorly increase MySQL select performance using the native adapter (jeremyevans)

* Pass through unsigned/elements/size and other options when altering columns on MySQL (tmm1)

* Allow on_duplicate_key_update to affect Dataset#insert on MySQL (tmm1)

* Support using a given table and column to store schema versions, using new Migrator.run method (bougyman, jeremyevans)

* Fix foreign key table constraints on MySQL (jeremyevans)

* Remove Dataset#table_exists?, use Database#table_exists? instead (jeremyevans)

* Fix graphing of datasets with dataset sources (jeremyevans) (#271)

* Raise a Sequel::Error if Sequel.connect is called with something other than a Hash or String (jeremyevans) (#272)

* Add -N option to bin/sequel to not test the database connection (jeremyevans)

* Make Model.grep call Dataset#grep instead of Enumerable#grep (jeremyevans)

* Support the use of Regexp as first argument to StringExpression.like (jeremyevans)

* Fix Database#indexes on PostgreSQL when the schema used is a symbol (jeremyevans)

=== 3.1.0 (2009-06-04)

* Require the classes match to consider an association a reciprocal (jeremyevans) (#270)

* Make Migrator work correctly with file names like 001_873465873465873465_some_name.rb (jeremyevans) (#267)

* Add Dataset#qualify_to and #qualify_to_first_source, for qualifying unqualified identifiers in the dataset (jeremyevans)

* All the use of #sql_subscript on most SQL::* objects, and support non-integer subscript values (jeremyevans)

* Add reflection.rdoc file which explains and gives examples of many of Sequel's reflection methods (jeremyevans)

* Add many_through_many plugin, allowing you to construct an association to multiple objects through multiple join tables (jeremyevans)

* Add the :cartesian_product_number option to associations, for specifying if they can cause a cartesian product (jeremyevans)

* Make :eager_graph association option work correctly when lazily loading many_to_many associations (jeremyevans)

* Make eager_unique_table_alias consider joined tables as well as tables in the FROM clause (jeremyevans)

* Make add_graph_aliases work correctly even if set_graph_aliases hasn't been used (jeremyevans)

* Fix using :conditions that are a placeholder string in an association (e.g. :conditions=>['a = ?', 42]) (jeremyevans)

* On MySQL, make Dataset#insert_ignore affect #insert as well as #multi_insert and #import (jeremyevans, tmm1)

* Add -t option to bin/sequel to output the full backtrace if an exception is raised (jeremyevans)

* Make schema_dumper extension ignore errors with indexes unless it is dumping in the database-specific type format (jeremyevans)

* Don't dump partial indexes in the MySQL adapter (jeremyevans)

* Add :ignore_index_errors option to Database#create_table and :ignore_errors option to Database#add_index (jeremyevans)

* Make graphing a complex dataset work correctly (jeremyevans)

* Fix MySQL command out of sync errors, disconnect from database if they occur (jeremyevans)

* In the schema_dumper extension, do a much better job of parsing defaults from the database (jeremyevans)

* On PostgreSQL, assume the public schema if one is not given and there is no default in Database#tables (jeremyevans)

* Ignore a :default value if creating a String :text=>true or File column on MySQL, since it doesn't support defaults on text/blob columns (jeremyevans)

* On PostgreSQL, do not raise an error when attempting to reset the primary key sequence for a table without a primary key (jeremyevans)

* Allow plugins to have a configure method that is called on every attempt to load them (jeremyevans)

* Attempting to load an already loaded plugin no longer calls the plugin's apply method (jeremyevans)

* Make plugin's plugin_opts methods return an array of arguments if multiple arguments were given, instead of just the first argument (jeremyevans)

* Keep track of loaded plugins at Model.plugins, allows plugins to depend on other plugins (jeremyevans)

* Make Dataset#insert on PostgreSQL work with static SQL (jeremyevans)

* Add lazy_attributes plugin, for creating attributes that can be lazily loaded from the database (jeremyevans)

* Add tactical_eager_loading plugin, similar to DataMapper's strategic eager loading (jeremyevans)

* Don't raise an error when loading a plugin with DatasetMethods where none of the methods are public (jeremyevans)

* Add identity_map plugin, for creating temporary thread-local identity maps with some caching (jeremyevans)

* Support savepoints when using MySQL and SQLite (jeremyevans)

* Add -C option to bin/sequel that copies one database to another (jeremyevans)

* In the schema_dumper extension, don't include defaults that contain literal strings unless the DBs are the same (jeremyevans)

* Only include valid non-partial indexes of simple column references in the PostgreSQL adapter (jeremyevans)

* Add -h option to bin/sequel for outputting the usage, alias for -? (jeremyevans)

* Add -d and -D options to bin/sequel for dumping schema migrations (jeremyevans)

* Support eager graphing for model tables that lack primary keys (jeremyevans)

* Add Model.create_table? to the schema plugin, similar to Database#create_table? (jeremyevans)

* Add Database#create_table?, which creates the table if it doesn't already exist (jeremyevans)

* Handle ordered and limited datasets correctly when using UNION, INTERSECT, or EXCEPT (jeremyevans)

* Fix unlikely threading bug with class level validations (jeremyevans)

* Make the schema_dumper extension dump tables in alphabetical order in migrations (jeremyevans)

* Add Sequel.extension method for loading extensions, so you don't have to use require (jeremyevans)

* Allow bin/sequel to respect multiple -L options instead of ignoring all but the last one (jeremyevans)

* Add :command_timeout and :provider options to ADO adapter (hgimenez)

* Fix exception messages when Sequel.string_to_* fail (jeremyevans)

* Fix String :type=>:text generic type in the Firebird adapter (wishdev)

* Add Sequel.amalgalite adapter method (jeremyevans)

=== 3.0.0 (2009-05-04)

* Remove dead threads from connection pool if the pool is full and a connection is requested (jeremyevans)

* Add autoincrementing primary key support in the Oracle adapter, using a sequence and trigger (jeremyevans, Mike Golod)

* Make Model#save use the same server it uses for saving as for retrieving the saved record (jeremyevans)

* Add Database#database_type method, for identifying which type of database the object is connecting to (jeremyevans)

* Add ability to reset primary key sequences in the PostgreSQL adapter (jeremyevans)

* Fix parsing of non-simple sequence names (that contain uppercase, spaces, etc.) in the PostgreSQL adapter (jeremyevans)

* Support dumping indexes in the schema_dumper extension (jeremyevans)

* Add index parsing to PostgreSQL, MySQL, SQLite, and JDBC adapters (jeremyevans)

* Correctly quote SQL Array references, and handle qualified identifiers with them (e.g. :table__column.sql_subscript(1)) (jeremyevans)

* Allow dropping an index with a name different than the default name (jeremyevans)

* Allow Dataset#from to remove existing FROM tables when called without an argument, instead of raising an error later (jeremyevans)

* Fix string quoting on Oracle so it doesn't double backslashes (jeremyevans)

* Alias the count function call in Dataset#count, fixes use on MSSQL (akitaonrails, jeremyevans)

* Allow QualifiedIdentifiers to be qualified, to allow :column.qualify(:table).qualify(:schema) (jeremyevans)

* Allow :db_type=>'mssql' option to be respected when using the DBI adapter (akitaonrails)

* Add schema_dumper extension, for dumping schema of tables (jeremyevans)

* Allow generic database types specified as ruby types to take options (jeremyevans)

* Change Dataset#exclude to invert given hash argument, not negate it (jeremyevans)

* Make Dataset#filter and related methods treat multiple arguments more intuitively (jeremyevans)

* Fix full text searching with multiple search terms on MySQL (jeremyevans)

* Fix altering a column name, type, default, or NULL/NOT NULL status on MySQL (jeremyevans)

* Fix index type syntax on MySQL (jeremyevans)

* Add temporary table support, via :temp option to Database#create_table (EppO, jeremyevans)

* Add Amalgalite adapter (jeremyevans)

* Remove Sequel::Metaprogramming#metaattr_accessor and metaattr_reader (jeremyevans)

* Remove Dataset#irregular_function_sql (jeremyevans)

* Add Dataset#full_text_sql to the MySQL adapter (dusty)

* Fix schema type parsing of decimal types on MySQL (jeremyevans)

* Make Dataset#quote_identifier work with SQL::Identifiers (jeremyevans)

* Remove methods and features deprecated in 2.12.0 (jeremyevans)

=== 2.12.0 (2009-04-03)

* Deprecate Java::JavaSQL::Timestamp#usec (jeremyevans)

* Fix Model.[] optimization introduced in 2.11.0 for databases that don't use LIMIT (jacaetevha)

* Don't use the model association plugin if SEQUEL_NO_ASSOCIATIONS constant or environment variable is defined (jeremyevans)

* Don't require core_sql if SEQUEL_NO_CORE_EXTENSIONS constant or environment variable is defined (jeremyevans)

* Add validation_helpers model plugin, which adds instance level validation support similar to previously standard validations, with a different API (jeremyevans)

* Split multi_insert into 2 methods with separate APIs, multi_insert for hashes, import for arrays of columns and values (jeremyevans)

* Deprecate Dataset#transform and Model.serialize, and model serialization plugin (jeremyevans)

* Add multi_insert_update to the MySQL adapter, used for setting specific update behavior when an error occurs when using multi_insert (dusty)

* Add multi_insert_ignore to the MySQL adapter, used for skipping errors on row inserts when using multi_insert (dusty)

* Add Sequel::MySQL.convert_invalid_date_time accessor for dealing with dates like "0000-00-00" and times like "25:00:00" (jeremyevans, epugh)

* Eliminate internal dependence on core_sql extensions (jeremyevans)

* Deprecate Migration and Migrator, require 'sequel/extensions/migration' if you want them (jeremyevans)

* Denamespace Sequel::Error decendants (e.g. use Sequel::Rollback instead of Sequel::Error::Rollback) (jeremyevans)

* Deprecate Error::InvalidTransform, Error::NoExistingFilter, and Error::InvalidStatement (jeremyevans)

* Deprecate Dataset#[] when called without an argument, and Dataset#map when called with an argument and a block (jeremyevans)

* Fix aliasing columns in the JDBC adapter (per.melin) (#263)

* Make Database#rename_table remove the cached schema entry for the table (jeremyevans)

* Make Database schema sql methods private (jeremyevans)

* Deprecate Database #multi_threaded? and #logger (jeremyevans)

* Make Dataset#where always affect the WHERE clause (jeremyevans)

* Deprecate Object#blank? and related extensions, require 'sequel/extensions/blank' to get them back (jeremyevans)

* Move lib/sequel_core into lib/sequel and lib/sequel_model into lib/sequel/model (jeremyevans)

* Remove Sequel::Schema::SQL module, move methods into Sequel::Database (jeremyevans)

* Support creating and dropping schema qualified views (jeremyevans)

* Fix saving a newly inserted record in an after_create or after_save hook (jeremyevans)

* Deprecate Dataset#print and PrettyTable, require 'sequel/extensions/pretty_table' if you want them (jeremyevans)

* Deprecate Database#query and Dataset#query, require 'sequel/extensions/query' if you want them (jeremyevans)

* Deprecate Dataset#paginate and #each_page, require 'sequel/extensions/pagination' if you want them (jeremyevans)

* Fix ~{:bool_col=>true} and related inversions of boolean values (jeremyevans)

* Add disable_insert_returning method to PostgreSQL datasets, so they fallback to just using INSERT (jeremyevans)

* Don't use savepoints by default on PostgreSQL, use the :savepoint option to Database#transaction to use a savepoint (jeremyevans)

* Deprecate Database#transaction accepting a server symbol argument, use an options hash with the :server option (jeremyevans)

* Add Model.use_transactions for setting whether models should use transactions when destroying/saving records (jeremyevans, mjwillson)

* Deprecate Model::Validation::Errors, use Model::Errors (jeremyevans)

* Deprecate string inflection methods, require 'sequel/extensions/inflector' if you use them (jeremyevans)

* Deprecate Model validation class methods, override Model#validate instead or Model.plugin validation_class_methods (jeremyevans)

* Deprecate Model schema methods, use Model.plugin :schema (jeremyevans)

* Deprecate Model hook class methods, use instance methods instead or Model.plugin :hook_class_methods (jeremyevans)

* Deprecate Model.set_sti_key, use Model.plugin :single_table_inheritance (jeremyevans)

* Deprecate Model.set_cache, use Model.plugin :caching (jeremyevans)

* Move most model instance methods into Model::InstanceMethods, for easier overriding of instance methods for all models (jeremyevans)

* Move most model class methods into Model::ClassMethods, for easier overriding of class methods for all models (jeremyevans)

* Deprecate String#to_date, #to_datetime, #to_time, and #to_sequel_time, use require 'sequel/extensions/string_date_time' if you want them (jeremyevans)

* Deprecate Array#extract_options! and Object#is_one_of? (jeremyevans)

* Deprecate Object#meta_def, #meta_eval, and #metaclass (jeremyevans)

* Deprecate Module#class_def, #class_attr_overridable, #class_attr_reader, #metaalias, #metaattr_reader, and #metaatt_accessor (jeremyevans)

* Speed up the calling of most column accessor methods, and reduce memory overhead of creating them (jeremyevans)

* Deprecate Model#set_restricted using Model#[] if no setter method exists, a symbol is used, and the columns are not set (jeremyevans)

* Deprecate Model#set_with_params and #update_with_params (jeremyevans)

* Deprecate Model#save!, use Model.save(:validate=>false) (jeremyevans)

* Deprecate Model#dataset (jeremyevans)

* Deprecate Model.is and Model.is_a, use Model.plugin for plugins (jeremyevans)

* Deprecate Model.str_columns, Model#str_columns, #set_values, #update_values (jeremyevans)

* Deprecate Model.delete_all, .destroy_all, .size, and .uniq (jeremyevans)

* Copy all current dataset options when calling Model.db= (jeremyevans)

* Deprecate Model.belongs_to, Model.has_many, and Model.has_and_belongs_to_many (jeremyevans)

* Remove SQL::SpecificExpression, have subclasses inherit from SQL::Expression instead (jeremyevans)

* Deprecate SQL::CastMethods#cast_as (jeremyevans)

* Deprecate calling Database#schema without a table argument (jeremyevans)

* Remove cached version of @db_schema in model instances to reduce memory and marshalling overhead (tmm1)

* Deprecate Dataset#quote_column_ref and Dataset#symbol_to_column_ref (jeremyevans)

* Deprecate Dataset#size and Dataset#uniq (jeremyevans)

* Deprecate passing options to Dataset#each, #all, #single_record, #single_value, #sql, #select_sql, #update, #update_sql, #delete, #delete_sql, and #exists (jeremyevans)

* Deprecate Dataset#[Integer] (jeremyevans)

* Deprecate Dataset#create_view and Dataset#create_or_replace_view (jeremyevans)

* Model datasets now have a model accessor that returns the related model (jeremyevans)

* Model datasets no longer have :models and :polymorphic_key options (jeremyevans)

* Deprecate Dataset.dataset_classes, Dataset#model_classes, Dataset#polymorphic_key, and Dataset#set_model (jeremyevans)

* Allow Database#get and Database#select to take a block (jeremyevans)

* Deprecate Database#>> (jeremyevans)

* Deprecate String#to_blob and Sequel::SQL::Blob#to_blob (jeremyevans)

* Deprecate use of Symbol#| for SQL array subscripts, add Symbol#sql_subscript (jeremyevans)

* Deprecate Symbol#to_column_ref (jeremyevans)

* Deprecate String#expr (jeremyevans)

* Deprecate Array#to_sql, String#to_sql, and String#split_sql (jeremyevans)

* Deprecate passing an array to Database#<< (jeremyevans)

* Deprecate Range#interval (jeremyevans)

* Deprecate Enumerable#send_each (jeremyevans)

* Deprecate Hash#key on ruby 1.8, change some SQLite adapter constants (jeremyevans)

* Deprecate Sequel.open, Sequel.use_parse_tree=?, and the upcase_identifier methods (jeremyevans)

* Deprecate virtual row blocks without block arguments, unless Sequel.virtual_row_instance_eval is enabled (jeremyevans)

* Support schema parsing in the Oracle adapter (jacaetevha)

* Allow virtual row blocks to be instance_evaled, add Sequel.virtual_row_instance_eval= (jeremyevans)

=== 2.11.0 (2009-03-02)

* Optimize Model.[] by using static sql when possible, for a 30-40% speed increase (jeremyevans)

* Add Dataset#with_sql, which returns a clone of the datatset with static SQL (jeremyevans)

* Refactor Dataset#literal so it doesn't need to be overridden in subadapters, for a 20-25% performance increase (jeremyevans)

* Remove SQL::IrregularFunction, no longer used internally (jeremyevans)

* Allow String#lit to take arguments and return a SQL::PlaceholderLiteralString (jeremyevans)

* Add Model#set_associated_object, used by the many_to_one setter method, for easier overriding (jeremyevans)

* Allow use of database independent types when casting (jeremyevans)

* Give association datasets knowledge of the model object that created them and the related association reflection (jeremyevans)

* Make Dataset#select, #select_more, #order, #order_more, and #get take a block that yields a SQL::VirtualRow, similar to #filter (jeremyevans)

* Fix stored procedures in MySQL adapter when multiple arguments are used (clivecrous)

* Add :conditions association option, for easier filtering of associated objects (jeremyevans)

* Add :clone association option, for making clones of existing associations (jeremyevans)

* Handle typecasting invalid date strings (and possible other types) correctly (jeremyevans)

* Add :compress=>false option to MySQL adapter to turn off compression of client-server connection (tmm1)

* Set SQL_AUTO_IS_NULL=0 on MySQL connections, disable with :auto_is_null=>false (tmm1)

* Add :timeout option to MySQL adapter, default to 30 days (tmm1)

* Set MySQL encoding using Mysql#options so it works across reconnects (tmm1)

* Fully support blobs on SQLite (jeremyevans)

* Add String#to_sequel_blob, alias String#to_blob to that (jeremyevans)

* Fix default index names when a non-String or Symbol column is used (jeremyevans)

* Fix some ruby -w warnings (jeremyevans) (#259)

* Fix issues with default column values, table names, and quoting in the rename_column and drop_column support in shared SQLite adapter (jeremyevans)

* Add rename_column support to SQLite shared adapter (jmhodges)

* Add validates_inclusion_of validation (jdunphy)

=== 2.10.0 (2009-02-03)

* Don't use a default schema any longer in the shared PostgreSQL adapter (jeremyevans)

* Make Dataset#quote_identifier return LiteralStrings as-is (jeremyevans)

* Support symbol keys and unnested hashes in the sequel command line tool's yaml config support (jeremyevans)

* Add schema parsing support to the JDBC adapter (jeremyevans)

* Add per-database type translation support for schema changes, translating ruby classes to database specific types (jeremyevans)

* Add Sequel::DatabaseConnectionError, for indicating that Sequel wasn't able to connect to the database (jeremyevans)

* Add validates_not_string validation, useful in conjunction with raise_on_typecast_failure = false (jeremyevans)

* Don't modify Model#new? and Model#changed_columns when saving a record until after the after hooks have been run (tamas, jeremyevans)

* Database#quote_identifiers= now affects future schema modification statements, even if it is not used before one of the schema modification statements (jeremyevans)

* Fix literalization of blobs when using the PostreSQL JDBC subadapter (jeremyevans)

* Fix literalization of date and time types when using the MySQL JDBC subadapter (jeremyevans)

* Convert some Java specific types to ruby types on output in the JDBC adapter (jeremyevans)

* Add Database#tables method to JDBC adapter (jeremyevans)

* Add H2 JDBC subadapter (logan_barnett, david_koontz, james_britt, jeremyevans)

* Add identifer_output_method, used for converting identifiers coming out of the database, replacing the lowercase support on some databases (jeremyevans)

* Add identifier_input_method, used for converting identifiers going into the database, replacing upcase_identifiers (jeremyevans)

* Add :allow_missing validation option, useful if the database provides a good default (jeremyevans)

* Fix literalization of SQL::Blobs in DataObjects and JDBC adapter's postgresql subadapters when ruby 1.9 is used (jeremyevans)

* When using standard strings in the postgres adapter with the postgres-pr driver, use custom string escaping to prevent errors (jeremyevans)

* Before hooks now run in reverse order of being added, so later ones are run first (tamas)

* Add Firebird adapter, requires Firebird ruby driver located at http://github.com/wishdev/fb (wishdev)

* Don't clobber the following Symbol instance methods when using ruby 1.9: [], <, <=, >, >= (jeremyevans)

* Quote the table name and the index for PostgreSQL index creation (jeremyevans)

* Add DataObjects adapter, supporting PostgreSQL, MySQL, and SQLite (jeremyevans)

* Add ability for Database#create_table to take options, support specifying MySQL engine, charset, and collate per table (pusewicz, jeremyevans)

* Add Model.add_hook_type class method, for adding your own hook types, mostly for use by plugin authors (pkondzior, jeremyevans)

* Add Sequel.version for getting the internal version of Sequel (pusewicz, jeremyevans)

=== 2.9.0 (2009-01-12)

* Add -L option to sequel command line tool to load all .rb files in the given directory (pkondzior, jeremyevans)

* Fix Dataset#destroy for model datasets that can't handle nested queries (jeremyevans)

* Improve the error messages in parts of Sequel::Model (jeremyevans, pusewicz)

* Much better support for Dataset#{union,except,intersect}, allowing chaining and respecting order (jeremyevans)

* Default to logging only WARNING level messages when connecting to PostgreSQL (jeremyevans)

* Fix add_foreign_key for MySQL (jeremyevans, aphyr)

* Correctly literalize BigDecimal NaN and (+-)Infinity values (jeremyevans) (#256)

* Make Sequel raise an Error if you attempt to subclass Sequel::Model before setting up a database connection (jeremyevans)

* Add Sequel::BeforeHookFailed exception to be raised when a record fails because a before hook fails (bougyman)

* Add Sequel::ValidationFailed exception to be raised when a record fails because a validation fails (bougyman)

* Make Database#schema raise an error if given a table that doesn't exist (jeremyevans) (#255)

* Make Model#inspect call Model#inspect_values private method for easier overloading (bougyman)

* Add methods to create and drop functions, triggers, and procedural languages on PostgreSQL (jeremyevans)

* Fix Dataset#count when using UNION, EXCEPT, or INTERSECT (jeremyevans)

* Make SQLite keep table's primary key information when dropping columns (jmhodges)

* Support dropping indicies on SQLite (jmhodges)

=== 2.8.0 (2008-12-05)

* Support drop column operations inside a transaction on sqlite (jeremyevans)

* Support literal strings with placeholders and subselects in prepared statements (jeremyevans)

* Have the connection pool remove disconnected connections when the adapter supports it (jeremyevans)

* Make Dataset#exists return a LiteralString (jeremyevans)

* Support multiple SQL statements in one query in the MySQL adapter (jeremyevans)

* Add stored procedure support for the MySQL and JDBC adapters (jeremyevans, krsgoss) (#252)

* Support options when altering a column's type (for changing enums, varchar size, etc.) (jeremyevans)

* Support AliasedExpressions in tables when using implicitly qualified arguments in joins (jeremyevans)

* Support Dataset#except on Oracle (jeremyevans)

* Raise errors when EXCEPT/INTERSECT is used when not supported (jeremyevans)

* Fix ordering of UNION, INTERSECT, and EXCEPT statements (jeremyevans) (#253)

* Support aliasing subselects in the Oracle adapter (jeremyevans)

* Add a subadapter for the Progress RDBMS to the ODBC adapter (:db_type=>'progress') (groveriffic) (#251)

* Make MySQL and Oracle adapters raise an Error if asked to do a SELECT DISTINCT ON (jeremyevans)

* Set standard_conforming_strings = ON by default when using PostgreSQL, turn off with Sequel::Postgres.force_standard_strings = false (jeremyevans) (#247)

* Fix Database#rename_table when using PostgreSQL (jeremyevans) (#248)

* Whether to upcase or quote identifiers can now be set separately, via Sequel.upcase_identifiers= or the :upcase_identifiers database option (jeremyevans)

* Support transactions in the ODBC adapter (dlee)

* Support multi_insert_sql and unicode string literals in MSSQL shared adapter (dlee)

* Make PostgreSQL use the default schema if parsing the schema for all tables at once, even if :schema=>nil option is used (jeremyevans)

* Make MySQL adapter not raise an error when giving an SQL::Identifier object to the schema modification methods such as create_table (jeremyevans)

* The keys of the hash returned by Database#schema without a table name are now quoted strings instead of symbols (jeremyevans)

* Make Database#schema to handle implicit schemas on all databases and multiple identifier object types (jeremyevans)

* Remove Sequel.odbc_mssql method (jeremyevans) (#249)

* More optimization of Model#initialize (jeremyevans)

* Treat interval as it's own type, not an integer type (jeremyevans)

* Allow use of implicitly qualified symbol as argument to Symbol#qualify (:a.qualify(:b__c)=>b.c.a), fixes model associations in different schemas (jeremyevans) (#246)

=== 2.7.1 (2008-11-04)

* Fix PostgreSQL Date optimization so that it doesn't reject dates like 11/03/2008 (jeremyevans)

=== 2.7.0 (2008-11-03)

* Transform AssociationReflection from a single class to a class hierarchy (jeremyevans)

* Optimize Date object creation in PostgreSQL adapter (jeremyevans)

* Allow easier creation of custom association types, though support for them may still be suboptimal (jeremyevans)

* Add :eager_grapher option to associations, which the user can use to override the default eager_graph code (jeremyevans)

* Associations are now inherited when a model class is subclassed (jeremyevans)

* Instance methods added by associations are now added to an anonymous module the class includes, allowing you to override them and use super (jeremyevans)

* Add #add_graph_aliases (select_more for graphs), and allow use of arbitrary expressions when graphing (jeremyevans)

* Fix a corner case where the wrong table name is used in eager_graph (jeremyevans)

* Make Dataset#join_table take an option hash instead of a table_alias argument, add support for :implicit_qualifier option (jeremyevans)

* Add :left_primary_key and :right_primary_key options to many_to_many associations (jeremyevans)

* Add :primary_key option to one_to_many and many_to_one associations (jeremyevans)

* Make after_load association callbacks take effect when eager loading via eager (jeremyevans)

* Add a :uniq association option to many_to_many associations (jeremyevans)

* Support using any expression as the argument to Symbol#like (jeremyevans)

* Much better support for multiple schemas in PostgreSQL (jeremyevans) (#243)

* The first argument to Model#initalize can no longer be nil, it must be a hash if it is given (jeremyevans)

* Remove Sequel::Model.lazy_load_schema= setting (jeremyevans)

* Lazily load model instance options such as raise_on_save_failure, for better performance (jeremyevans)

* Make Model::Validiation::Errors more Rails-compatible (jeremyevans)

* Refactor model hooks for performance (jeremyevans)

* Major performance enhancement when fetching rows using PostgreSQL (jeremyevans)

* Don't typecast serialized columns in models (jeremyevans)

* Add Array#sql_array to handle ruby arrays of all two pairs as SQL arrays (jeremyevans) (#245)

* Add ComplexExpression#== and #eql?, for checking equality (rubymage) (#244)

* Allow full text search on PostgreSQL to include rows where a search column is NULL (jeremyevans)

* PostgreSQL full text search queries with multiple columns are joined with space to prevent joining border words to one (michalbugno)

* Don't modify a dataset's cached column information if calling #each with an option that modifies the columns (jeremyevans)

* The PostgreSQL adapter will now generally default to using a unix socket in /tmp if no host is specified, instead of a tcp socket to localhost (jeremyevans)

* Make Dataset#sql call Dataset#select_sql instead of being an alias, to allow for easier subclassing (jeremyevans)

* Split Oracle adapter into shared and unshared parts, so Oracle is better supported when using JDBC (jeremyevans)

* Fix automatic loading of Oracle driver when using JDBC adapter (bburton333) (#242)

=== 2.6.0 (2008-10-11)

* Make the sqlite adapter respect the Sequel.datetime_class setting, for timestamp and datetime types (jeremyevans)

* Enhance the CASE statement support to include an optional expression (jarredholman)

* Default to using the simple language if no language is specified for a full text index on PostgreSQL (michalbugno)

* Add Model.raise_on_typecast_failure=, which makes it possible to not raise errors on invalid typecasts (michalbugno)

* Add schema.rdoc file, which provides an brief description of the various parts of Sequel related to schema modification (jeremyevans)

* Fix constraint generation when not using a proc or interpolated string (jeremyevans)

* Make eager_graph respect associations' :order options (use :order_eager_graph=>false to disable) (jeremyevans)

* Cache negative lookup when eagerly loading many_to_one associations where no objects have an associated object (jeremyevans)

* Allow string keys to be used when using Dataset#multi_insert (jeremyevans)

* Fix join_table when doing the first join for a dataset where the first source is a dataset when using unqualified columns (jeremyevans)

* Fix a few corner cases in eager_graph (jeremyevans)

* Support transactions on MSSQL (jeremyevans)

* Use string literals in AS clauses on SQLite (jeremyevans) (#241)

* AlterTableGenerator#set_column_allow_null was added to SET/DROP NOT NULL for columns (divoxx)

* Database#tables now works for MySQL databases using the JDBC adapter (jeremyevans)

* Database#drop_view can now take multiple arguments to drop multiple views at once (jeremyevans)

* Schema modification methods (e.g. drop_table, create_table!) now remove the cached schema entry (jeremyevans)

* Models can now determine their primary keys by looking at the schema (jeremyevans)

* No longer include :numeric_precision and :max_chars entries in the schema column hashes, use the :db_type entry instead (jeremyevans)

* Make schema parsing on PostgreSQL handle implicit schemas (e.g. schema(:schema__table)), so it works with models for tables outside the public schema (jeremyevans)

* Significantly speed up schema parsing on MySQL (jeremyevans)

* Include primary key information when parsing the schema (jeremyevans)

* Fix schema generation of composite foreign keys on MySQL (clivecrous, jeremyevans)

=== 2.5.0 (2008-09-03)

* Add Dataset #set_defaults and #set_overrides, used for scoping the values used in insert/update statements (jeremyevans)

* Allow Models to use the RETURNING clause when inserting records on PostgreSQL (jeremyevans)

* Raise Sequel::DatabaseError instead of generic Sequel::Error for database errors, don't swallow tracebacks (jeremyevans)

* Use INSERT ... RETURNING ... with PostgreSQL 8.2 and higher (jeremyevans)

* Make insert_sql, delete_sql, and update_sql respect the :sql option (jeremyevans)

* Default to converting 2 digit years, use Sequel.convert_two_digit_years = false to get back the old behavior (jeremyevans)

* Make the PostgreSQL adapter with the pg driver use async_exec, so it doesn't block the entire interpreter (jeremyevans)

* Make the schema generators support composite primary and foreign keys and unique constraints (jarredholman)

* Work with the 2008.08.17 version of the pg gem (erikh)

* Disallow abuse of SQL function syntax for types (use :type=>:varchar, :size=>255 instead of :type=>:varchar[255]) (jeremyevans)

* Quote index names when creating or dropping indexes (jeremyevans, SanityInAnarchy)

* Don't have column accessor methods override plugin instance methods (jeremyevans)

* Allow validation of multiple attributes at once, with built in support for uniqueness checking of multiple columns (jeremyevans)

* In PostgreSQL adapter, fix inserting a row with a primary key value inside a transaction (jeremyevans)

* Allow before_save and before_update to affect the columns saved by save_changes (jeremyevans)

* Make Dataset#single_value work when graphing, which fixes count and paginate on graphed datasets (jeremyevans)

=== 2.4.0 (2008-08-06)

* Handle Java::JavaSql::Date type in the JDBC adapter (jeremyevans)

* Add support for read-only slave/writable master databases and database sharding (jeremyevans)

* Remove InvalidExpression, InvalidFilter, InvalidJoinType, and WorkerStop exceptions (jeremyevans)

* Add prepared statement/bound variable support (jeremyevans)

* Fix anonymous column names in the ADO adapter (nusco)

* Remove odbc_mssql adapter, use :db_type=>'mssql' option instead (jeremyevans)

* Split MSSQL specific syntax into separate file, usable by ADO and ODBC adapters (nusco, jeremyevans)

=== 2.3.0 (2008-07-25)

* Enable almost full support for MySQL using JDBC (jeremyevans)

* Fix ODBC adapter's conversion of ::ODBC::Time values (Michael Xavier)

* Enable full support for SQLite-JDBC using the JDBC adapter (jeremyevans)

* Minor changes to allow for full Ruby 1.9 compatibility (jeremyevans)

* Make Database#disconnect work for the ADO adapter (spicyj)

* Don't raise an exception in the ADO adapter if the dataset contains no records (nusco)

* Enable almost full support of PostgreSQL-JDBC using the JDBC adapter (jeremyevans)

* Remove Sequel::Worker (jeremyevans)

* Make PostgreSQL adapter not raise an error when inserting records into a table without a primary key (jeremyevans)

* Make Database.uri_to_options a private class method (jeremyevans)

* Make JDBC load drivers automatically for PostgreSQL, MySQL, SQLite, Oracle, and MSSQL (jeremyevans)

* Make Oracle adapter work with a nonstandard Oracle database port (pavel.lukin)

* Typecast '' to nil by default for non-string non-blob columns, add typecast_empty_string_to_nil= model class and instance methods (jeremyevans)

* Use a simpler select in Dataset#empty?, fixes use with MySQL (jeremyevans)

* Add integration test suite, testing sequel against a real database, with nothing mocked (jeremyevans)

* Make validates_length_of default tag depend on presence of options passed to it (jeremyevans)

* Combine the directory structure for sequel_model and sequel_core, now there is going to be only one gem named sequel (jeremyevans)

=== 2.2.0 (2008-07-05)

* Add :extend association option, extending the dataset with module(s) (jeremyevans)

* Add :after_load association callback option, called after associated objects have been loaded from the database (jeremyevans)

* Make validation methods support a :tag option, to work correctly with source reloading (jeremyevans)

* Add :before_add, :after_add, :before_remove, :after_remove association callback options (jeremyevans)

* Break many_to_one association setter method in two parts, for easier overriding (jeremyevans)

* Model.validates_presence_of now considers false as present instead of absent (jeremyevans)

* Add Model.raise_on_save_failure, raising errors on save failure instead of return false (now nil), default to true (jeremyevans)

* Add :eager_loader association option, to specify code to be run when eager loading (jeremyevans)

* Make :many_to_one associations support :dataset, :order, :limit association options, as well as block arguments (jeremyevans)

* Add :dataset association option, which overrides the default base dataset to use (jeremyevans)

* Add :eager_graph association option, works just like :eager except it uses #eager_graph (jeremyevans)

* Add :graph_join_table_join_type association option (jeremyevans)

* Add :graph_only_conditions and :graph_join_table_only_conditions association options (jeremyevans)

* Add :graph_block and :graph_join_table_block association options (jeremyevans)

* Set the model's dataset's columns in addition to the model's columns when loading the schema for a model (jeremyevans)

* Make caching work correctly with subclasses (jeremyevans)

* Add the Model.to_hash dataset method (jeremyevans)

* Filter blocks now yield a SQL::VirtualRow argument, which is useful if another library defines operator methods on Symbol (jeremyevans)

* Add Symbol#identifier method, to make x__a be treated as "x__a" instead of "x"."a" (jeremyevans)

* Dataset#update no longer takes a block, please use a hash argument with the expression syntax instead (jeremyevans)

* ParseTree support has been removed from Sequel (jeremyevans)

* Database#drop_column is now supported in the SQLite adapter (abhay)

* Tinyint columns can now be considered integers instead of booleans by setting Sequel.convert_tinyint_to_bool = false (samsouder)

* Allow the use of URL parameters in connection strings (jeremyevans)

* Ignore any previously selected columns when using Dataset#graph for the first time (jeremyevans)

* Dataset#graph now accepts a block which is passed to join_table (jeremyevans)

* Make Dataset#columns ignore any filtering, ordering, and distinct clauses (jeremyevans)

* Use the safer connection-specific string escaping methods for PostgreSQL (jeremyevans)

* Database#transaction now yields a connection when using the Postgres adapter, just like it does for other adapters (jeremyevans)

* Dataset#count now works for a limited dataset (divoxx)

* Database#add_index is now supported in the SQLite adapter (abhay)

* Sequel's MySQL adapter should no longer conflict with ActiveRecord's use of MySQL (careo)

* Treat Hash as expression instead of column alias when used in DISTINCT, ORDER BY, and GROUP BY clauses (jeremyevans)

* PostgreSQL bytea fields are now fully supported (dlee)

* For PostgreSQL, don't raise an error when assigning a value to a SERIAL PRIMARY KEY field when inserting records (jeremyevans)

=== 2.1.0 (2008-06-17)

* Break association add_/remove_/remove_all_ methods into two parts, for easier overriding (jeremyevans)

* Add Model.strict_param_setting, on by default, which raises errors if a missing/restricted method is called via new/set/update/etc. (jeremyevans)

* Raise errors when using association methods on objects without valid primary keys (jeremyevans)

* The model's primary key is a restricted column by default, Add model.unrestrict_primary_key to get the old behavior (jeremyevans)

* Add Model.set_(allowed|restricted)_columns, which affect which columns create/new/set/update/etc. modify (jeremyevans)

* Calls to Model.def_dataset_method with a block are cached and reapplied to the new dataset if set_dataset is called, even in a subclass (jeremyevans)

* The :reciprocal option to associations should now be the symbol name of the reciprocal association, not an instance variable symbol (jeremyevans)

* Add Model#associations, which is a hash holding a cache of associated objects, with each association being a separate key (jeremyevans)
  
* Make all associations support a :graph_select option, specifying a column or array of columns to select when using eager_graph (jeremyevans)

* Bring back Model#set and Model#update, now the same as Model#set_with_params and Model#update_with_params (jeremyevans)

* Allow model datasets to call to_hash without any arguments, which allows easy creation of identity maps (jeremyevans)

* Add Model.set_sti_key, for easily setting up single table inheritance (jeremyevans)

* Make all associations support a :read_only option, which doesn't add methods that modify the database (jeremyevans)

* Make *_to_many associations support a :limit option, for specifying a limit to the resulting records (and possibly an offset) (jeremyevans)

* Make association block argument and :eager option affect the _dataset method (jeremyevans)

* Add a :one_to_one option to one_to_many associations, which creates a getter and setter similar to many_to_one (a.k.a. has_one) (jeremyevans)

* add_ and remove_ one_to_many association methods now raise an error if the passed object cannot be saved, instead of saving without validation (jeremyevans)

* Add support for :if option on validations, using a symbol (specifying an instance method) or a proc (dtsato)

* Support bitwise operators for NumericExpressions: &, |, ^, ~, <<, >> (jeremyevans)

* No longer raise an error for Dataset#filter(true) or Dataset#filter(false) (jeremyevans)

* Allow Dataset #filter, #or, #exclude and other methods that call them to use both the block and regular arguments (jeremyevans)

* ParseTree support is now officially deprecated, use Sequel.use_parse_tree = false to use the expression (blockless) filters inside blocks (jeremyevans)

* Remove :pool_reuse_connections ConnectionPool/Database option, MySQL users need to be careful with nested queries (jeremyevans)

* Allow Dataset#graph :select option to take an array of columns to select (jeremyevans)

* Allow Dataset#to_hash to be called with only one argument, allowing for easy creation of lookup tables for a single key (jeremyevans)

* Allow join_table to accept a block providing the aliases and previous joins, that allows you to specify arbitrary conditions properly qualified (jeremyevans)

* Support NATURAL, CROSS, and USING joins in join_table (jeremyevans)

* Make sure HAVING comes before ORDER BY, per the SQL standard and at least MySQL, PostgreSQL, and SQLite (juco)

* Add cast_numeric and cast_string methods for use in the Sequel DSL, that have default types and wrap the object in the correct class (jeremyevans)

* Add Symbol#qualify, for adding a table/schema qualifier to a column/table name (jeremyevans)

* Remove Module#metaprivate, since it duplicates the standard Module#private_class_method (jeremyevans)

* Support the SQL CASE expression via Array#case and Hash#case (jeremyevans)

* Support the SQL EXTRACT function: :date.extract(:year) (jeremyevans)

* Convert numeric fields to BigDecimal in PostgreSQL adapter (jeremyevans)

* Add :decimal fields to the schema parser (jeremyevans)

* The expr argument in join table now allows the same argument as filter, so it can take a string or a blockless filter expression (brushbox, jeremyevans)

* No longer assume the expr argument to join_table references the primary key column (jeremyevans)

* Rename the Sequel.time_class setting to Sequel.datetime_class (jeremyevans)

* Add savepoint/nesting support to postgresql transactions (elven)

* Use the specified table alias when joining a dataset, instead of the automatically generated alias (brushbox)

=== 2.0.1 (2008-06-04)

* Make the choice of Time or DateTime optional for typecasting :datetime types, default to Time (jeremyevans)

* Reload database schema for table when calling Model.create_table (jeremyevans)

* Have PostgreSQL money type use BigDecimal instead of Float (jeremyevans)

* Have the PostgreSQL and MySQL adapters use the Sequel.time_class setting for datetime/timestamp types (jeremyevans)

* Add Sequel.time_class and String#to_sequel_time, used for converting time values from the database to either Time (default) or DateTime (jeremyevans)

* Make identifier quoting uppercase by default, to work better with the SQL standard, override in PostgreSQL (jeremyevans) (#232)

* Add StringExpression#+, for simple SQL string concatenation (:x.sql_string + :y) (jeremyevans)

* Make StringMethods.like to a case sensensitive search on MySQL (use ilike for the old behavior) (jeremyevans)

* Add StringMethods.ilike, for case insensitive pattern matching (jeremyevans)

* Refactor ComplexExpression into three subclasses and a few modules, so operators that don't make sense are not defined for the class (jeremyevans)

=== 2.0.0 (2008-06-01)

* Comprehensive update of all documentation (jeremyevans)

* Remove methods deprecated in 1.5.0 (jeremyevans)

* Add typecasting on attribute assignment to Sequel::Model objects, optional but enabled by default (jeremyevans)

* Returning false in one of the before_ hooks now causes the appropriate method(s) to immediately return false (jeremyevans)

* Add remove_all_* association method for *_to_many associations, which removes the association with all currently associated objects (jeremyevans)

* Add Model.lazy_load_schema=, when set to true, it loads the schema on first instantiation (jeremyevans)

* Add before_validation and after_validation hooks, called whenever the model is validated (jeremyevans)

* Add Model.default_foreign_key, a private class method that allows changing the default foreign key that Sequel will use in associations (jeremyevans)

* Cache negative lookup when eagerly loading many_to_one associations (jeremyevans)

* Make all associations support the :select option, not just many_to_many (jeremyevans)

* Allow the use of blocks when eager loading, and add the :eager_block and :allow_eager association options for configuration (jeremyevans)
  
* Add the :graph_join_type, :graph_conditions, and :graph_join_table_conditions association options, used when eager graphing (jeremyevans)

* Add AssociationReflection class (subclass of Hash), to make calling a couple of private Model methods unnecessary (jeremyevans)

* Change hook methods so that if a tag/method is specified it overwrites an existing hook block with the same tag/method (jeremyevans)

* Refactor String inflection support, you must use String.inflections instead of Inflector.inflections now (jeremyevans)

* Allow connection to ODBC-MSSQL via a URL (petersumskas) (#230)

* Comprehensive update of all documentation, except for the block filters and adapters (jeremyevans)

* Handle Date and DateTime value literalization correctly in adapters (jeremyevans)

* Literalize DateTime values the same as Time values (jeremyevans)

* MySQL tinyints are now returned as boolean values instead of integers (jeremyevans)

* Set additional MySQL charset options required for creating tables and databases (tmm1)

* Remove methods deprecated in 1.5.0 (jeremyevans)

* Add Module#metaattr_accessor for creating attr_accessors for the metaclass (jeremyevans)

* Add SQL string concatenation support to blockless filters, via Array#sql_string_join (jeremyevans)

* Add Pagination#last_page? and Pagination#first_page? (apeiros)

* Add limited column reflection support, tested on PostgreSQL, MySQL, and SQLite (jeremyevans)

* Allow the use of :schema__table___table_alias syntax for tables, similar to the column support (jeremyevans)

* Merge metaid gem into core_ext.rb and clean it up, so sequel now has no external dependencies (jeremyevans)

* Add Dataset#as, so using a dataset as a column with an alias is not deprecated (jeremyevans)

* Add Dataset#invert, which returns a dataset with inverted HAVING and WHERE clauses (jeremyevans)

* Add blockless filter syntax support (jeremyevans)

* Passing an array to Dataset#order and Dataset#select no longer works, you need to pass multiple arguments (jeremyevans)

* You should use '?' instead of '(?)' when using interpolated strings with array arguments (jeremyevans)

* Dataset.literal now surrounds the literalization of arrays with parentheses (jeremyevans)

* Add echo option (back?) to sequel command line tool, via -E or --echo (jeremyevans)

* Allow databases to have multiple loggers (jeremyevans)

* The sequel command line tool now also accepts a path to a database config YAML file in addition to a URI (mtodd)

* Major update of the postgresql adapter (jdavis, jeremyevans) (#225)

* Make returning inside of a database transaction commit the transaction (ahoward, jeremyevans)

* Dataset#to_table_reference is now protected, and it has a different API (jeremyevans)

* Dataset#join_table and related functions now take an explicit optional table_alias argument, you can no longer include the table alias in the table argument (jeremyevans)

* Aliased and/or qualified columns with embedded spaces can now be specified as symbols (jeremyevans)

* When identifier quoting is enabled, the SQL standard double quote is used by default (jeremyevans)

* When identifier quoting is enabled, quote tables as well as columns (jeremyevans)

* Make identifier quoting optional, enabled by default (jeremyevans)

* Allow Sequel::Database.connect and related methods to take a block that disconnects the database when the block finishes (jeremyevans)

* Add Dataset#unfiltered, for removing filters from dataset (jeremyevans)

* Add add_foreign_key and add_primary_key methods to the AlterTableGenerator (jeremyevans)

* Allow migration files to have more than 3 digits (jeremyevans)

* Add methods directly to Dataset instead of including modules (jeremyevans)

* Make some Dataset instance methods private: invert_order, insert_default_values_sql (jeremyevans)

* Don't add methods that depend on ParseTree unless you can load ParseTree (jeremyevans)

* Don't wipeout the cached columns every time a dataset is cloned, but only on changes to :select, :sql, :from, or :join (jeremyevans)

* Fix Oracle Adapter (yasushi.abe)

* Fixed sqlite uri so that sqlite:// works just like file:// (2 slashes for a relative path, 3 for an absolute) (dlee)

* Raise a Sequel::Error if an invalid limit or offset is used (jeremyevans)

* Refactor and beef up Dataset#first and Dataset#last, with some change in functionality (jeremyevans)

* Add String#to_datetime, for consistency (jeremyevans)

* Fix Range#interval so that it returns 1 less for an exclusive range

* Change SQLite adapter so it doesn't swallow exceptions other than SQLite3::Exception (such as Interrupt) (jeremyevans)

* Change PostgreSQL and MySQL adapters to raise Sequel::Error instead of database specific errors if a database error occurs (jeremyevans)

* Using a memory database with SQLite now defaults to a single connection, so all queries it uses run against the same database (jeremyevans)

* Fix attempting to query MySQL using the same connection being used to concurrently execute another query (jeremyevans)

* Add options to the connection pool to configure reusing connections and converting exceptions (jeremyevans)

* Use the database driver provided string quoting methods for MySQL and SQLite (jeremyevans) (#223)

* Add ColumnAll#==, for checking the equality of two ColumnAlls (jeremyevans)

* Allow an array of arrays instead of a hash when specifying conditions (jeremyevans)

* Add Sequel::DBI::Database#lowercase, for lowercasing column names (jamesearl)

* Remove Dataset#extend_with_destroy, which may break code that uses Dataset#set_model directly and expects the destroy method to be added (jeremyevans)

* Fix some issues when running on Ruby 1.9 (Zverok, jeremyevans)

* Make the DBI adapter work (partially) with PostgreSQL (Seb)

=== 1.5.1 (2008-04-30)

* Fix Dataset#eager_graph when not all objects have associated objects (jeremyevans)

* Have Dataset#graph give a nil value instead of a hash with all nil values if no matching rows exist in the graphed table (jeremyevans)

=== 1.5.0 (2008-04-29)

* Make the validation errors API compatible with Merb (Inviz)

* Add validates_uniqueness_of, for protecting against duplicate entries in the database (neaf, jeremyevans)

* Alias Model#dataset= to Model#set_dataset (tmm1)

* Make some Model class methods private: def_hook_method, hooks, add_hook, plugin_module, plugin_gem (jeremyevans)

* Add the eager! and eager_graph! mutation methods to model datasets (jeremyevans)

* Remove Model.database_opened (jeremyevans)

* Remove Model.super_dataset (jeremyevans)

* Deprecate .create_with_params, .create_with, #set, #update, #update_with, and #new_record from Sequel::Model (jeremyevans)

* Add Model.def_dataset_method, for defining methods on the model that reference methods on the dataset (jeremyevans)

* Deprecate Model.method_missing, add dataset methods to Model via metaprogramming (jeremyevans)

* Remove Model.join, so it is the same as Dataset#join (jeremyevans)

* Use reciprocal associations for all types of associations in the getter/setter/add_/remove_ methods (jeremyevans)

* Fix many_to_one associations to cache negative lookups (jeremyevans)

* Change Model#=== to always be false if the primary key is nil (jeremyevans)

* Add Model#hash, which should be unique for a given class and primary key (or values if primary key is nil) (jeremyevans)

* Add Model#eql? as a alias to Model#== (jeremyevans)

* Make Model#reload clear any cached associations (jeremyevans)

* No longer depend on the assistance gem, merge the Inflector and Validations code (jeremyevans)

* Add Model#set_with_params, which is Model#update_with_params without the save (jeremyevans)
  
* Fix Model#destroy so that it returns self, not the result of after_destroy (jeremyevans)

* Define Model column accessors in set_dataset, so they should always be avaiable, deprecate Model#method_missing (jeremyevans)

* Add eager loading of associations via new sequel_core object graphing feature (jeremyevans)

* Fix many_to_many associations with classes inside modules without an explicit join table (jeremyevans)

* Allow creation of new records that don't have primary keys when the cache is on (jeremyevans) (#213)

* Make Model#initialize, Model#set, and Model#update_with_params invulnerable to memory exhaustion (jeremyevans) (#210)

* Add Model.str_columns, which gives a list of columns as frozen strings (jeremyevans)

* Remove pretty_table.rb from sequel, since it is in sequel_core (jeremyevans)

* Set a timeout in the Sqlite adapter, default to 5 seconds (hrvoje.marjanovic) (#218)

* Document that calling Sequel::ODBC::Database#execute manually requires you to manually drop the returned object (jeremyevans) (#217)

* Paginating an already paginated/limited dataset now raises an error (jeremyevans)

* Add support for PostgreSQL partial indexes (dlee)

* Added support for arbitrary index types (including spatial indexes) (dlee)

* Quote column names in SQL generated for SQLite (tmm1)

* Deprecate Object#rollback! (jeremyevans)

* Make some Dataset methods private (qualified_column_name, column_list, table_ref, source_list) (jeremyevans)

* Deprecate Dataset methods #set_options, #set_row_proc, #remove_row_proc, and #clone_merge (jeremyevans)

* Add Symbol#*, a replacement for Symbol#all (jeremyevans)

* Deprecate including ColumnMethods in Object, include it in Symbol, String, and Sequel::SQL::Expression (jeremyevans)

* Deprecate Symbol#method_missing, and #AS, #DESC, #ASC, #ALL, and #all from ColumnMethods (jeremyevans)

* Fix table joining in MySQL (jeremyevans)

* Deprecate Sequel.method_missing and Object#Sequel, add real Sequel.adapter methods (jeremyevans)

* Move dataset methods applicable only to paginated datasets into Sequel::Dataset::Pagination (jeremyevans)

* Make Sequel::Dataset::Sequelizer methods private (jeremyevans)

* Deprecate Dataset#method_missing, add real mutation methods (e.g. filter!) (jeremyevans)

* Fix connecting to an MSSQL server via ODBC using domain user credentials (jeremyevans) (#216)

* No longer depend on the assistance gem, merge in the ConnectionPool and .blank methods (jeremyevans)

* No longer depend on ParseTree, RubyInline, or ruby2ruby, but you still need them if you want to use the block filters (jeremyevans)

* Fix JDBC adapter by issuing index things start at 1 (pdamer)

* Fix connecting to a database via the ADO adapter (now requires options instead of URI) (timuckun, jeremyevans) (#204)

* Support storing microseconds in postgres timestamp fields (schnarch...@rootimage.msu.edu) (#215)

* Allow joining of multiple datasets, by making the table alias different for each dataset joined (jeremyevans)

* SECURITY: Fix backslash escaping of strings (dlee)

* Add ability to create a graph of objects from a query, with the result split into corresponding tables (jeremyevans) (#113)

* Add attr_accessor for dataset row_proc (jeremyevans)

* Don't redefine Dataset#each when adding a transform or row_proc (jeremyevans)

* Remove array_keys.rb from sequel_core, it was partially broken (since the arrays came from hashes), and redefined Dataset#each (jeremyevans)

* Fix MySQL default values insert (matt.binary) (#196)

* Fix ODBC adapter improperly escaping date and timestamp values (leo.borisenko) (#165)

* Fix renaming columns on MySQL with type :varchar (jeremyevans) (#206)

* Add Sequel::SQL::Function#==, for comparing SQL Functions (jeremyevans) (#209)

* Update Informix adapter to work with Ruby/Informix 0.7.0 (gerardo.santana@gmail.com)

* Remove sequel_core's knowledge of Sequel::Model (jeremyevans)

* Use "\n" instead of $/ (since $/ can be redefined in ways we do not want) (jeremyevans)

=== 1.4.0 (2008-04-08) 

* Don't mark a column as changed unless the new value is different from the current value (tamas.denes, jeremyevans) (#203).

* Switch gem name from "sequel_model" to just "sequel", which required large version bump (jeremyevans).

* Add :select option to many_to_many associations, default to selecting only the associated model table and not the join table (jeremyevans) (#208).

* Add :reciprocal one_to_many association option, for setting corresponding many_to_one instance variable (jeremyevans).

* Add eager loading implementation (jeremyevans).

* Change *_to_many associations so that the all associations are considered :cache=>true (jeremyevans).

* Fix associations with block arguments and :cache=>true (jeremyevans).

* Merge 3 mysql patches from the bugtracker (mvyver) (#200, #201, #202).

* Merge 2 postgresql patches from the bugtracker (a...@mellowtone.co.jp) (#211, 212).

* Allow overriding of default posgres spec database via ENV['SEQUEL_PG_SPEC_DB'] (jeremyevans).

* Allow using the Sequel::Model as the first argument in a dataset join selection (jeremyevans) (#170).

* Add simple callback mechanism to make model eager loading implementation easier (jeremyevans).

* Added Sequel::Error::InvalidOperation class for invalid operations (#198).

* Implemented MySQL::Database#server_version (#199).

* Added spec configuration for MySQL socket file.

* Fixed transform with array tuples in postgres adapter.

* Changed spec configuration to Database objects instead of URIs in order to support custom options for spec databases.

* Renamed schema files.

* Fixed Dataset#from to work correctly with SQL functions (#193).

===Previous to 1.4.0, Sequel model and Sequel core versioning differed, see the bottom of this file for the changelog to Sequel model prior to 1.4.0.

=== 1.3 (2008-03-08)

* Added configuration file for running specs (#186).

* Changed Database#drop_index to accept fixed arity (#173).

* Changed column definition sql to put UNSIGNED constraint before unique in order to satisfy MySQL (#171).

* Enhanced MySQL adapter to support load data local infile_, added compress option for mysql connection by default (#172).

* Fixed bug when inserting hashes in array tuples mode.

* Changed SQLite adapter to catch RuntimeError raised when executing a statement and raise an Error::InvalidStatement with the offending SQL and error message (#188).

* Added Error::InvalidStatement class.

* Fixed Dataset#reverse to not raise for unordered dataset (#189).

* Added Dataset#unordered method and changed #order to remove order if nil is specified (#190).

* Fixed reversing order of ASC expression (#164).

* Added support for :null => true option when defining table columns (#192).

* Fixed Symbol#method_missing to accept variable arity (#185).

=== 1.2.1 (2008-02-29)

* Added add_constraint and drop_constraint functionality to Database#alter_table (#182).

* Enhanced Dataset#multi_insert to accept datasets (#179).

* Added MySQL::Database#use method for switching database (#180).

* Enhanced Database.uri_to_options to accept uri strings (#178).

* Added Dataset#columns! method that always makes a roundtrip to the DB (#177).

* Added new Dataset#each_page method that iterates over all pages in the result set (#175).

* Added Dataset#reverse alias to Dataset#reverse_order (#174).

* Fixed Dataset#transform_load and #transform_save to create a trasnformed copy of the supplied hash instead of transforming it in place (#184).

* Implemented MySQL::Dataset#replace (#163).

=== 1.2 (2008-02-15)

* Added support for :varchar[100] like type declarations in #create_table.

* Fixed #rename_column in mysql adapter to support types like varchar(255) (#159).

* Added support for order and limit in DELETE statement in MySQL adapter (#160).

* Added checks to Dataset#multi_insert to prevent work if no values are given (#162).

* Override ruby2ruby implementation of Proc#to_sexp which leaks memory (#161).

* Added log option, help for sequel script (#157).

=== 1.1 (2008-02-15)

* Fixed Dataset#join_table to support joining of datasets (#156).

* Changed Dataset#empty? to use EXISTS condition instead of counting records, for much better performance (#158).

* Implemented insertion of multiple records in a single statement for postgres adapter. This feature is available only in postgres 8.2 and newer.

* Implemented Postgres::Database#server_version.

* Implemented Database#get, short for dataset.get(...).

* Refactored Dataset#multi_insert, added #import alias, added support for calling #multi_insert using array of columns and array of value arrays (thanks David Lee).

* Implemented Dataset#get, a replacement for select(column).first[column].

* Implemented Dataset#grep method, poor man's text search.

=== 1.0.10 (2008-02-13)

* Fixed Datset#group_and_count to work inside a query block (#152).

* Changed datasets with transforms to automatically transform hash filters (#155).

* Changed Marshal stock transform to use Base64 encoding with backward-compatibility to support existing marshaled values (#154).

* Added support for inserting multiple records in a single statement using #multi_insert in MySQL adapter (#153).

* Added support for :slice option (same as :commit_every) in Dataset#multi_insert.

* Changed Dataset#all to accept opts and iteration block.

=== 1.0.9 (2008-02-10)

* Implemented Dataset#inspect and Database#inspect (#151).

* Added full-text searching for odbc_mssql adapter (thanks Joseph Love).

* Added AlterTableGenerator#add_full_text_index method.

* Implemented full_text indexing and searching for PostgreSQL adapter (thanks David Lee).

* Implemented full_text indexing and searching for MySQL adapter (thanks David Lee).

* Fixed Dataset#insert_sql to work with array subscript references (thanks Jim Morris).

=== 1.0.8 (2008-02-08)

* Added support for multiple choices in string matching expressions (#147).

* Renamed Dataset#clone_merge to Dataset#clone, works with or without options for merging (#148).

* Fixed MySQL::Database#<< method to always free the result in order to allow multiple calls in a row (#149). Same also for PostgreSQL adapter.

=== 1.0.7 (2008-02-05)

* Added support for conditional filters (using if else statements) inside block filters (thanks Kee).

=== 1.0.6 (2008-02-05)

* Removed code pollution introduced in revs 814, 817 (really bad patch, IMO).

* Fixed joining datasets using aliased tables (#140).

* Added support additional field types in postgresql adapter (#146).

* Added support for date field types in postgresql adapter (#145).

* Fixed Dataset#count to work correctly for grouped datasets (#144).

* Added Dataset#select_more, Dataset#order_more methods (#129).

=== 1.0.5 (2008-01-25)

* Added support for instantiating models by using the load constructor method.

=== 1.0.4.1 (2008-01-24)

* Fixed bin/sequel to require sequel_model if available.

=== 1.0.4 (2008-01-24)

* Added Dataset#select_all method.

* Changed ODBC::Database to support connection using driver and database name, also added support for untitled columns in ODBC::Dataset (thanks Leonid Borisenko).

* Fixed MySQL adapter to correctly format foreign key definitions (#123).

* Changed MySQL::Dataset to allow HAVING clause on ungrouped datasets, and put HAVING clause before ORDER BY clause (#133).

* Changed Dataset#group_and_count to accept multiple columns (#134).

* Fixed database spec to open YAML file in binary mode (#131).

* Cleaned up gem spec (#132).

* Added Dataset#table_exists? convenience method.

=== 1.0.3 (2008-01-17)

* Added support for UNSIGNED constraint, used in MySQL? (#127).

* Implemented constraint definitions inside Database#create_table.

* Fixed postgres adapter to define PGconn#async_exec as alias to #exec if not defined (for pure-ruby postgres driver).

* Added String#to_date. Updated mysql adapter to use String#to_date for mysql date types (thanks drfreeze).

=== 1.0.2 (2008-01-14)

* Removed ConnectionPool, NumericExtensions. Added dependency on assistance.

=== 1.0.1 (2008-01-12)

* Changed postgres adapter to quote column references using double quotes.

* Applied patch for oracle adapter: fix behavior of limit and offset, transactions, #table_exists?, #tables and additional specs (thanks Liming Lian #122).

* Allow for additional filters on a grouped dataset (#119 and #120)

* Changed mysql adapter to default to localhost if :host option is not specified (#114).

* Refactored Sequelizer to use Proc#to_sexp (method provided by r2r).

* Enhanced Database.connect to accept options with string keys, so it can now accept options loaded from YAML files. Database.connect also automatically converts :username option into :user for compatibility with existing YAML configuration files for AR and DataMapper.

=== 1.0.0.1 (2008-01-03)

* Changed MySQL adapter to support specifying socket option.

* Added support for limiting and paginating datasets with fixed SQL, gotten with DB#fetch (thanks Ruy Diaz). 

* Added new Dataset#from_self method that returns a dataset selecting from the original dataset.

=== 1.0 (2008-01-02)

* Removed deprecated adapter stubs.

* Removed Sequel::Model() stub.

* Changed name to sequel_core.

* 100% code coverage.

* Fixed error behavior when sequel_model is not available.

* Fixed error behavior when parse_tree or ruby2ruby are not available.

=== 0.5.0.2 (2008-01-01)

* Fixed String#to_time to raise error correctly for invalid time stamps.

* Improved code coverage - now at 99.2%.

=== 0.5.0.1 (2007-12-31)

* Added a stub for Sequel::Model that auto-loads sequel_model.

* Changed Sequel.method_missing and Database.adapter_class to raise AdapterNotFound if an adapter could not be loaded.

* Fixed behavior of error trap in sequel command line tool.

=== 0.5 (2007-12-30)

* Removed model code into separate sub-project. Rearranged trunk into core, model and model_plugins.

=== 0.4.5 (2007-12-25)

* Added rdoc for new alter_table functionality (#109).

* Fixed update_sql with array sub-item keys (#110).

* Refactored model specs.

* Added Model#update as alias to #set.

* Refactored validations code. Renamed Model.validations? into Model.has_validations?.

* Added initial Model validations (Thanks Lance Carlson)

* Added Database#set_column_default method (thanks Jim Morris.)

* Removed warning on uninitialized @transform value (thanks Jim Morris).

=== 0.4.4.2 (2007-12-20)

* Fixed parsing errors in Ruby 1.9.

* Fixed sync problem in connection_pool_spec.

* Changed String#to_time to raise Error::InvalidValue if Time.parse fails.

* Refactored sequel error classes.

=== 0.4.4.1 (2007-12-19)

* Fixed schema generation code to use field quoting and support adapter-specific literalization of default values (#108).

=== 0.4.4 (2007-12-17)

* Implemented Database#rename_table (#104).

* Fixed drop_index in mysql adapter (#103).

* Added ALTER TABLE specs for postgres, sqlite and mysql adapters. Added custom alter_table behavior for sqlite and mysql adapters (#101, #102).

* Added direct Database API for altering tables.

* Added Database#alter_table method with support for adding, dropping, renaming, modifying columns and adding and droppping indexes.

* Added #unique schema method for defining unique indexes (thanks Dado).

* Implemented unfolding of #each calls inside sequelizer blocks (thanks Jim Morris).

=== 0.4.3 (2007-12-15)

* Fixed Dataset#update to accept strings (#98).

* Fixed Model.[] to raise for boolean argument (#97).

* Added Database#add_index method (thanks coda.hale).

* Added error reporting for filtering on comparison not in a block (thanks Jim Morris).

* Added support for inline index definition (thanks Dado).

* Added Database#create_table! method for forcibly creating a table (thanks Dado).

* Added support for using Dataset#update with block.

* Changed subscript access to use | operator.

* Fixed subscript access in sequelizer.

* Added support for subscript access using Symbol#/ operator.

=== 0.4.2.2 (2007-12-10)

* Improved code coverage.

* Fixed Dataset#count to work properly with datasets with fixed SQL (when using #fetch).

* Added Model.create_with_params method that filters the given parameters accordring to the model's columns (thanks Aman Gupta). 

=== 0.4.2.1 (2007-12-09)

* Refactored and fixed Dataset#reverse_order to work with field quoting (thanks Christian).

* Fixed problem with field quoting in insert statements.

* Changed sequelizer code to silently fail on any error when requiring parsetree and ruby2ruby.

* Added Database#create_view, #create_or_replace_view and #drop_view methods. Also implemented Dataset#create_view and #create_or_replace_view convenience methods.

* Keep DRY by re-using Model#[]= from method_missing.

* Added Model.fetch alias for DB.fetch.set_model(Model)

=== 0.4.2 (2007-12-07)

* Implemented Model#save_changes.

* Extended Model#save to accept specific columns to update.

* Implemented experimental JDBC adapter.

* Added adapter skeleton as starting point for new adapters.

* Cleaned-up adapters and moved automatic requiring of 'sequel' to adapter stubs.

=== 0.4.1.3 (2007-12-05)

* Better plugin conventions.

* Added experimental OpenBase adapter.

* Fixed Sequel.<xxx> methods to accept options hash as well as database name. Fixed Sequel.connect to accept options hash as well as URI (Wayne).

=== 0.4.1.2 (2007-12-04)

* Added release rake task (using RubyForge).

* Changed Model.is to accept variable arity.

* Implemented plugin loading for model classes.

* Fixed odbc-mssql and odbc adapters (thanks Dusty.)

* Implemented odbc-mssql adapter (thanks Dusty.)

=== 0.4.1.1 (2007-11-27)

* Fixed #first and #last functionality in Informix::Dataset (thanks Gerardo Santana).

=== 0.4.1 (2007-11-25)

* Put adapter files in lib/sequel/adapters. Requiring sequel/<adapter> is now deprecated. Users can now just require 'sequel' and adapters are automagically loaded (#93).

=== 0.4.0 (2007-11-24)

* Reorganized lib directory structure.

* Added support for dbi-xxx URI schemes (#86).

* Fixed problem in Database#uri where setting the password would raise an error (#87).

* Improved Dataset#insert_sql to correctly handle string keys (#92).

* Improved error-handling for worker threads. Errors are saved to an array and are accessible through #errors (#91).

* Dataset#uniq/distinct can now accept a column list for DISTINCT ON clauses.

* Fixed Model.all.

* Fixed literalization of strings with escape sequences in postgres adapter (#90).

* Added support for literalizing BigDecimal values (#89).

* Fixed column qualification for joined datasets (thanks Christian).

* Implemented experimental informix adapter.

=== 0.3.4.1 (2007-11-10)

* Changed Dataset#select_sql to support queries without a FROM clause.

=== 0.3.4 (2007-11-10)

* Fixed MySQL adapter to allow calling stored procedures (thanks Sebastian).

* Changed Dataset#each to always return self.

* Fixed SQL functions without arguments in block filters.

* Implemented super-cool Symbol#cast_as method.

* Fixed error message in command-line tool if failed to load adapter (#85).

* Refactored code relating to column references for better extendibility (#88).

* Tiny fix to Model#run_hooks.

=== 0.3.3 (2007-11-04)

* Revised code to generate SQL statements without trailing semicolons.

* Added Sequel::Worker implementation of a simple worker thread for asynchronous execution.

* Added spec for Oracle adapter.

* Fixed Oracle adapter to format INSERT statements without semicolons (thanks Liming Lian).

* Renamed alias to Array#keys as Array#columns instead of Array#fields.

* Renamed FieldCompositionMethods as ColumnCompositionMethods.

* Implemented Sequel::NumericExtensions to provide stuff like 30.days.ago.

=== 0.3.2 (2007-11-01)

* Added #to_column_name as alias to #to_field_name, #column_title as alias to #field_title.

* Added Dataset#interval method for getting interval between minimum/maximum values for a column.

* Fixed Oracle::Database#execute (#84).

* Added group_and_count as general implementation for count_by_xxx.

* Added count_by magic method.

* Added Dataset#range method for getting the minimum/maximum values for a column.

* Fixed timestamp translation in SQLite adapter (#83).

* Experimental DB2 adapter.

* Added Dataset#set as alias to Dataset#update.

* Removed long deprecated expressions.rb code.

* Better documentation.

* Implemented Dataset magic methods: order_by_xxx, group_by_xxx, filter_by_xxx, all_by_xxx, first_by_xxx, last_by_xxx.

* Changed Model.create and Model.new to accept a block.

=== 0.3.1 (2007-10-30)

* Typo fixes (#79).

* Added require 'yaml' to dataset.rb (#78).

* Changed postgres adapter to use the ruby-postgres library's type conversion if available (#76).

* Fixed string literalization in mysql adapter for strings with comment backslashes in them (#75).

* Fixed ParseTree dependency to work with version 2.0.0 and later (#74).

* foreign_key definitions now accept :key option for specifying the remote key (#73).

* Fixed Model#method_missing to not raise error for columns not in the table but for which a value exists (#77).

* New documentation for Model.

* Implemented Oracle adapter based on ruby-oci8 library.

* Implemented Model#pk_hash. Is it really necessary?

* Deprecated Model#pkey. Implemented better Model#pk method.

* Specs and docs for Model.one_to_one, Model.one_to_many macros.

=== 0.3.0.1 (2007-10-20)

* Changed Database#fetch to return a modified dataset.

=== 0.3 (2007-10-20)

* Added stock transforms to Dataset#transform. Refactored Model.serialize.

* Added Database#logger= method for setting the database logger object.

* Fixed Model.[] to act as shortcut to Model.find when a hash is given (#71).

* Added support for old and new decimal types in MySQL adapter, and updated MYSQL_TYPES with MySQL 5.0 constants (#72).

* Implemented Database#disconnect method for all adapters.

* Fixed small bug in ArrayKeys module.

* Implemented model caching by primary key.

* Separated Model.find and Model.[] functionality. Model.find takes a filter. Model.[] is strictly for finding by primary keys.

* Enhanced Dataset#first to accept a filter block. Model#find can also now accept a filter block.

* Changed Database#[] to act as shortcut to #fetch if a string is given.

* Renamed Database#each to #fetch. If no block is given, the method returns an enumerator.

* Changed Dataset#join methods to correctly literalize values in join conditions (#70).

* Fixed #filter with ranges to correctly literalize field names (#69).

* Implemented Database#each method for quickly retrieving records with arbitrary SQL (thanks Aman Gupta).

* Fixed bug in postgres adapter where a LiteralString would be literalized as a regular String.

* Fixed SQLite insert with subquery (#68).

* Reverted back to hashes as default mode. Added Sequel.use_array_tuples and Sequel.use_hash_tuples methods.

* Fixed problem with arrays with keys when using #delete.

* Implemented ArrayKeys as substitute for ArrayFields.

* Added Dataset#each_hash method.

* Rewrote SQLite::Database#transaction to use sqlite3-ruby library implementation of transactions.

* Fixed Model.destroy_all to work correctly in cases where no before_destroy hook is defined and an after_destroy hook is defined.

* Restored Model.has_hooks? implementation.

* Changed Database#<< to strip comments and whitespace only when an array is given.

* Changed Schema::Generator#primary_key to accept calls with the type argument omitted.

* Hooks can now be prepended or appended by choice.

* Changed Model.subset to define filter method on the underlying dataset instead of the model class.

* Fixed Dataset#transform to work with array fields.

* Added Dataset#to_csv method.

* PrettyTable can now extract column names from arrayfields.

* Converted ado, dbi, odbc adapters to use arrayfields instead of hashes.

* Fixed composite key support.

* Fixed Dataset#insert_sql, update_sql to support array fields.

* Converted sqlite, mysql, postgres adapters to use arrayfields instead of hashes.

* Extended Dataset#from to auto alias sub-queries.

* Extended Dataset#from to accept hash for aliasing tables.

* Added before_update, after_update hooks.

=== 0.2.1.1 (2007-10-07)

* Added Date literalization to sqlite adapter (#60).

* Changed Model.serialize to allow calling it after the class is defined (#59).

* Fixed after_create hooks to allow calling save inside the hook (#58).

* Fixed MySQL quoting of sql functions (#57).

* Implemented rollback! global method for cancelling transactions in progress.

* Fixed =~ operator in Sequelizer.

* Fixed ODBC::Dataset#fetch_rows (thanks Dusty).

* Renamed Model.recreate_table to create_table!. recreate_table is deprecated and will issue a warning (#56).

=== 0.2.1 (2007-09-24)

* Added default implementation of Model.primary_key_hash.

* Fixed Sequel::Model() to set dataset for inherited classes.

* Rewrote Model.serialize to use Dataset#transform.

* Implemented Dataset#transform.

* Added gem spec for Windows (without ParseTree dependency).

* Added support for dynamic strings in Sequelizer (#49).

* Query branch merged into trunk.

* Implemented self-changing methods.

* Add support for ternary operator to Sequelizer.

* Fixed sequelizer to evaluate expressions if they don't involve symbols or literal strings.

* Added protection against using #each, #delete, #insert, #update inside query blocks.

* Improved Model#method_missing to deal with invalid attributes.

* Implemented Dataset#query.

* Added Dataset#group_by as alias for Dataset#group.

* Added Dataset#order_by as alias for Dataset#order.

* More model refactoring. Added support for composite keys.

* Added Dataset#empty? method (#46).

* Fixed Symbol#to_field_name to support names with numbers and upper-case characters (#45).

* Added install_no_doc rake task.

* Partial refactoring of model code.

* Refactored dataset-model association and added Dataset#set_row_filter method.

* Added support for case-sensitive regexps to mysql adapter.

* Changed mysql adapter to support encoding option as well.

* Added charset/encoding option to postgres adapter.

* Implemented Model.serialize (thanks Aman Gupta.)

* Changed Model.create to INSERT DEFAULT VALUES instead of (id) VALUES (null) (brings back #41.)

* Fixed Model.new to work without arguments.

* Added Model.no_primary_key method to allow models without primary keys.

* Added Model#this method (#42 thanks Duane Johnson).

* Fixed Dataset#insert_sql to use DEFAULT VALUES clause if argument is an empty hash.

* Fixed Model.create to work correctly when no argument is passed (#41).

=== 0.2.0.2 (2007-09-07)

* Dataset#insert can now accept subqueries.

* Changed Migrator.apply to return the version.

* Changed Sequel::Model() to cache intermediate classes so descendant classes can be reopened (#39).

* Added :charset option to MySQL adapter (#40).

* Fixed Dataset#exclude to add parens around NOT expression (#38).

* Fixed use of sub-queries with all comparison operators in block filters (#38).

* Fixed arithmetic expressions in block filters to not be literalized.

* Changed Symbol#method_missing to return LiteralString.

* Changed PrettyTable to right-align numbers.

* Fixed Model.create_table (thanks Duane Johnson.)

=== 0.2.0.1 (2007-09-04)

* Improved support for invoking methods with inline procs inside block filters.

=== 0.2.0 (2007-09-02)

* Fixed Model.drop_table (thanks Duane Johnson.)

* Dataset#each can now return rows for arbitrary SQL by specifying :sql option.

* Added spec for postgres adapter.

* Fixed Model.method_missing to work with new SQL generation.

* Fixed #compare_expr to support regexps.

* Fixed postgres, mysql adapters to support regexps.

* More specs for block filters. Updated README.

* Added support for globals and $X macros in block filters.

* Fixed Sequelizer to not fail if ParseTree or Ruby2Ruby gems are missing.

* Renamed String#expr into String#lit (#expr should be deprecated in future versions).

* Renamed Sequel::ExpressionString into LiteralString.

* Fixed Symbol#[] to return an ExpressionString, so as not to be literalized.

* Renamed Dataset::Expressions to Dataset::Sequelizer.

* Renamed Expressions#format_re_expression to match_expr.

* Renamed Expressions#format_eq_expression to compare_expr.

* Added support for Regexp in MySQL adapter.

* Refactored Regexp expressions into a separate #format_re_expression method.

* Added support for arithmetic in proc filters.

* Added support for nested proc expressions, more specs.

* Added support for SQL function using symbols, e.g. :sum[:x].

* Fixed deadlock bug in ConnectionPool.

* Removed deprecated old expressions.rb.

* Rewrote Proc filter feature using ParseTree.

* Added support for additional functions on columns using Symbol#method_missing.

* Added support for supplying filter block to DB#[] method, to allow stuff like DB[:nodes] {:path =~ /^icex1/}.

=== 0.1.9.12 (2007-08-26)

* Added spec for PrettyTable.

* Added specs for Schema::Generator and Model (#36 thanks technoweenie).

* Fixed Sequel::Model.set_schema (#36 thanks technoweenie.)

* Added support for no options on Schema::Generator#foreign_key (#36 thanks technoweenie.)

* Implemented (restored?) Schema::Generator#primary_key_name (#36 thanks technoweenie.)

* Better spec code coverage.

=== 0.1.9.11 (2007-08-24)

* Changed Dataset#set_model to allow supplying additional arguments to the model's initialize method (#35). Thanks Sunny Hirai.

=== 0.1.9.10 (2007-08-22)

* Changed schema generation code to generate separate statements for CREATE TABLE and each CREATE INDEX (#34).

* Refactored Dataset::SQL#field_name for better support of different field quoting standards by specific adapters.

* Added #current_page_record_count for paginated datasets.

* Removed Database#literal and included Dataset::SQL instead.

* Sequel::Dataset:SQL#field_name can now take a hash (as well as #select and any method that uses #field_name) for aliasing column names.  E.g. DB[:test].select(:_qqa => 'Date').sql #=> 'SELECT _qqa AS Date FROM test'.

* Moved SingleThreadedPool to lib/sequel/connection_pool.rb.

* Changed SQLite::Dataset to return affected rows for #delete and #update (#33).

* ADO adapter: Added use of Enumerable for Recordset#Fields, playing it safe and moving to the first row before getting results, and changing the auto_increment constant to work for MSSQL.

=== 0.1.9.9 (2007-08-18)

* New ADO adapter by cdcarter (#31).

* Added automatic column aliasing to #avg, #sum, #min and #max (#30).

* Fixed broken Sequel::DBI::Dataset#fetch_rows (#29 thanks cdcarter.)

=== 0.1.9.8 (2007-08-15)

* Fixed DBI adapter.

=== 0.1.9.7 (2007-08-15)

* Added support for executing batch statements in sqlite adapter.

* Changed #current_page_record_range to return 0..0 for an invalid page.

* Fixed joining of aliased tables.

* Improved Symbol#to_field_name to prevent false positives.

* Implemented Dataset#multi_insert with :commit_every option.

* More docs for Dataset#set_model.

* Implemented automatic creation of convenience methods for each adapter (e.g. Sequel.sqlite etc.)

=== 0.1.9.6 (2007-08-13)

* Refactored schema definition code. Gets rid of famous primary_key problem as well as other issues (e.g. issue #22).

* Added #pagination_record_count, #page_range and #current_page_record_range for paginated datasets.

* Changed MySQL adapter to automatically reconnect (issue #26).

* Changed Sequel() to accept variable arity.

* Added :elements option to column definition, in order to support ENUM and SET types.

=== 0.1.9.5 (2007-08-12)

* Fixed migration docs.

* Removed dependency on PGconn in Schema class.

=== 0.1.9.4 (2007-08-11)

* Added Sequel.dbi convenience method for using DBI connection strings to open DBI databases.

=== 0.1.9.3 (2007-08-10)

* Added support for specifying field size in schema definitions (thanks Florian Assmann.)

* Added migration code based on work by Florian Assmann.

* Reintroduced metaid dependency. No need to keep a local copy of it.

=== 0.1.9.2 (2007-07-24)

* Removed metaid dependency. Re-factored requires in lib/sequel.rb.

=== 0.1.9.1 (2007-07-22)

* Improved robustness of MySQL::Dataset#field_name.

* Added Sequel.single_threaded= convenience method.

=== 0.1.9 (2007-07-21)

* Fixed #update_sql and #insert_sql to support field quoting by calling #field_name.

* Implemented automatic data type conversion in mysql adapter.

* Added support for boolean literals in mysql adapter.

* Added support for ORDER and LIMIT clauses in UPDATE statements in mysql adapter.

* Implemented correct field quoting (using back-ticks) in mysql adapter.

* Wrote basic MySQL spec.

* Fixd MySQL::Dataset to return correct data types with symbols as hash keys.

* Removed discunctional MySQL::Database#transaction.

* Added support for single threaded operation.

* Fixed bug in Dataset#format_eq_expression where Range objects would not be literalized correctly.

* Added parens around postgres LIKE expressions using regexps.

=== 0.1.8 (2007-07-10)

* Implemented Dataset#columns for retrieving the columns in the result set.

* Updated Model with changes to how model-associated datasets work.

* Beefed-up specs. Coverage is now at 95.0%.

* Added support for polymorphic datasets.

* The adapter dataset interface was simplified and standardized. Only four methods need be overriden: fetch_rows, update, insert and delete.

* The Dataset class was refactored. The bulk of the dataset code was moved into separate modules.

* Renamed Dataset#hash_column to Dataset#to_hash.

* Added some common pragmas to sqlite adapter.

* Added Postgres::Dataset#analyze for EXPLAIN ANALYZE queries.

* Fixed broken Postgres::Dataset#explain.

=== 0.1.7

* Removed db.synchronize wrapping calls in sqlite adapter.

* Implemented Model.join method to restrict returned columns to the model table (thanks Pedro Gutierrez).

* Implemented Dataset#paginate method.

* Fixed after_destroy hook.

* Improved Dataset#first and #last to accept a filter hash.

* Added Dataset#[]= method.

* Added Sequel() convenience method.

* Fixed Dataset#first to include a LIMIT clause for a single record.

* Small fix to Postgres driver to return a primary_key value for the inserted record if it is specified in the insertion values (thanks Florian Assmann and Pedro Gutierrez).

* Fixed Symbol#DESC to support qualified notation (thanks Pedro Gutierrez).

=== 0.1.6

* Fixed Model#method_missing to raise for an invalid attribute.

* Fixed PrettyTable to print model objects (thanks snok.)

* Fixed ODBC timestamp conversion to return DateTime rather than Time object (thanks snok.)

* Fixed Model.method_missing (thanks snok.)

* Model.method_missing now creates stubs for calling Model.dataset methods. Methods like Model.each etc are removed.

* Changed default join type to INNER JOIN (thanks snok.)

* Added support for literal expressions, e.g. DB[:items].filter(:col1 => 'col2 - 10'.expr).

* Added Dataset#and.

* SQLite adapter opens a memory DB if no database is specified, e.g. Sequel.open 'sqlite:/'.

* Added Dataset#or, pretty nifty.

=== 0.1.5

* Fixed Dataset#join to support multiple joins. Added #left_outer_join, #right_outer_join, #full_outer_join, #inner_join methods.

=== 0.1.4

* Added String#split_sql.

* Implemented Array#to_sql and String#to_sql. Database#to_sql can now take an array of strings and convert into an SQL string. Comments and excessive white-space are removed.

* Improved Schema generator to support data types as method names:
  DB.create_table :test do
    integer :abc
    text :def
    ...
  end

* Implemented ODBC adapter.

=== 0.1.3

* Implemented DBI adapter.

* Refactored database connection code. Now handled through Database#connect.

=== 0.1.2

* The first opened database is automatically assigned to to Model.db.

* Removed SequelConnectionError. Exception class errors are converted to RuntimeError.

* Added support for UNION, INTERSECT and EXCEPT set operations.

* Fixed Dataset#single_record to return nil if no record is found.

* Updated specs to conform to RSpec 1.0.

* Added Model#find_or_create method.

* Fixed MySQL::Dataset#query_single (thanks Dries Harnie.)

* Added Model.subset method. Fixed Model.filter and Model.exclude to accept blocks.

* Added Database#uri method.

* Refactored and removed deprecated code in postgres adapter.

===0.1.1

* More documentation for Dataset.

* Added Dataset#size as alias to Dataset#count.

* Changed Database#<< to call execute (instead of being an alias). Thus it will work for descendants as well.

* Fixed Sequel.open to accept variable arity.

* Refactored Model#refresh, Model.create. Removed Model#reload.

* Refactored Model hooks.

* Cleaned up Dataset API.

=== 0.1.0

* Changed Database#create_table to only accept a block. Nobody's gonna use the other way.

* Removed Dataset#[]= method. Too confusing and not really useful.

* Fixed ConnectionPool#hold to wrap exceptions only once.

* Dataset#where_list Renamed Dataset#expression_list.

* Added support for qualified fields in Proc expressions (e.g. filter {items.id == 1}.)

* Added like? and in? Proc expression operators.

* Added require 'date' in dataset.rb. Is this a 1.8.5 thing?

* Refactored Dataset to use literal strings instead of format strings (slight performance improvement and better readability.)

* Added support for literalizing Date objects.

* Refactored literalization of Time objects.

=== 0.0.20

* Refactored Dataset where clause construction to use expressions.

* Implemented Proc expressions (adapted from a great idea by Sam Smoot.)

* Fixed Model#map.

* Documentation for ConnectionPool.

* Specs for Database.

=== 0.0.19

* More specs for Dataset.

* Fixed Dataset#invert_order to work correctly with strings.

* Fixed Model#== to check equality of values.

* Added Model#exclude and Model#order.

* Fixed Dataset#order and Dataset#group to behave correctly when supplied with qualified field name symbols.

* Removed Database#literal. Shouldn't have been there.

* Added SQLite::Dataset#explain. Returns an array of opcode hashes.

* Specs for ConnectionPool.

=== 0.0.18

* Implemented SequelError and SequelConnectionError classes. ConnectionPool#hold now catches any connection errors and reraises them SequelConnectionError.

* Removed duplication in Database#[].

* :from and :select options are now always arrays (patch by Alex Bradbury.)

* Fixed Dataset#exclude to work correctly (patch and specs by Alex Bradbury.)

=== 0.0.17

* Fixed Postgres::Database#tables to return table names as symbols (caused problem when using Database#table_exists?).

* Fixed Dataset#from to have variable arity, like Dataset#select and Dataset#where (patch by Alex Bradbury.)

* Added support for GROUP BY and HAVING clauses (patches by Alex Bradbury.) Refactored Dataset#filter.

* More specs.

* Refactored Dataset#where for better composability.

* Added Dataset#[]= method.

* Added support for DISTINCT and OFFSET clauses (patches by Alex Bradbury.) Dataset#limit now accepts ranges. Added Dataset#uniq and distinct methods.

=== 0.0.16

* More documentation.

* Added support for subqueries in Dataset#literal.

* Added support for Model.all_by_XXX methods through Model.method_missing.

* Added basic SQL logging to Database.

* Added Enumerable#send_each convenience method.

* Changed Dataset#destroy to return the number of deleted records.

=== 0.0.15

* Improved Dataset#insert_sql to allow arrays as well as hashes.

* Database#drop_table now accepts a list of table names.

* Added Model#id to to return the id column.

=== 0.0.14

* Fixed Model's attribute accessors (hopefully for the last time).

* Changed Model.db and Model.db= to allow different databases for different model classes.

* Fixed bug in aggregate methods (max, min, etc) for datasets using record classes.

=== 0.0.13

* Fixed Model#method_missing to do both find, filter and attribute accessors. duh.

* Fixed bug in Dataset#literal when quoting arrays of strings (thanks Douglas Koszerek.)

=== 0.0.12

* Model#save now correctly performs an INSERT for new objects.

* Added Model#reload for reloading an object from the database.

* Added Dataset#naked method for getting a version of a dataset that fetches records as hashes.

* Implemented attribute accessors for column values ala ActiveRecord models.

* Fixed filtering using nil values (e.g. dataset.filter(:parent_id => nil)).

=== 0.0.11

* Renamed Model.schema to Model.set_schema and Model.get_schema to Model.schema.

* Improved Model class to allow descendants of model clases (thanks Pedro Gutierrez.)

* Removed require 'postgres' in schema.rb (thanks Douglas Koszerek.)

=== 0.0.10

* Added some examples.

* Added Dataset#print method for pretty-printing tables.

=== 0.0.9

* Fixed Postgres::Database#tables and #locks methods.

* Added PGconn#last_insert_id method that should support all 7.x and 8.x versions of Postgresql.

* Added Dataset#exists method for EXISTS where clauses.

* Changed behavior of Dataset#literal to regard symbols as field names.

* Refactored and DRY'd Dataset#literal and overrides therof. Added support for subqueries in where clause.

=== 0.0.8

* Fixed Dataset#reverse_order to provide chainability. This method can be called without arguments to invert the current order or with arguments to provide a descending order.

* Fixed literal representation of literals in SQLite adapter (thanks Christian Neukirchen!) 

* Refactored insert code in Postgres adapter (in preparation for fetching the last insert id for pre-8.1 versions).

=== 0.0.7

* Fixed bug in Model.schema, duh!

=== 0.0.6

* Added Dataset#sql as alias to Dataset#select_sql.

* Dataset#where and Dataset#exclude can now be used for refining dataset conditions, enabling stuff like posts.where(:title => 'abcdef').exclude(:user_id => 3).

* Implemented Dataset#exclude method.

* Added Sequel::Schema#auto_primary_key method for setting an automatic primary key to be added to every table definition. Changed the schema generator to not define a primary key by default.

* Changed Sequel::Database#table_exists? to rely on the tables method if it is available.

* Implemented SQLite::Database#tables.

=== 0.0.5

* Added Dataset#[] method. Refactored Model#find and Model#[].

* Renamed Pool#conn_maker to Pool#connection_proc.

* Added automatic require 'sequel' to all adapters for convenience.

=== 0.0.4

* Added preliminary MySQL support.

* Code cleanup.

=== 0.0.3

* Add Dataset#sum method.

* Added support for exclusive ranges (thanks Christian Neukirchen.)

* Added sequel console for quick'n'dirty access to databases.

* Fixed small bug in Dataset#qualified_field_name for better join support.

=== 0.0.2

* Added Sequel.open as alias to Sequel.connect.

* Refactored Dataset#where_equal_condition into Dataset#where_condition, allowing arrays and ranges, e.g. posts.filter(:stamp => (3.days.ago)..(1.day.ago)), or posts.filter(:category => ['ruby', 'postgres', 'linux']).

* Added Model#[]= method for changing column values and Model#save 
method for saving them.

* Added Dataset#destroy for deleting each record individually as support for models. Renamed Model#delete to Model#destroy (and Model#destroy_all) ala ActiveRecord.

* Refactored Dataset#first and Dataset#last code. These methods can now accept the number of records to fetch.

=== 0.0.1

* More documentation for Dataset.

* Renamed Database#query to Database#dataset.

* Added Dataset#insert_multiple for inserting multiple records.

* Added Dataset#<< as shorthand for inserting records.

* Added Database#<< method for executing arbitrary SQL.

* Imported Sequel code.


== Sequel::Model CHANGELOG 0.1 - 0.5.0.2

=== 0.5.0.2 (2008-03-12)

* More fixes for Model.associate to accept strings and symbols as class references.

=== 0.5.0.1 (2008-03-09)

* Fixed Model.associate to accept class and class name in :class option.

=== 0.5 (2008-03-08)

* Merged new associations branch into trunk.

* Rewrote RDoc for associations.

* Added has_and_belongs_to_many alias for many_to_many.

* Added support for optional dataset block.

* Added :order option to order association datasets.

* Added :cache option to return and cache array of objects for association.

* Changed one_to_many, many_to_many associations to return dataset by default.

* Added has_many, belongs_to aliases.

* Refactored associations code.

* Added deprecations for old-style relations.

* Completed specs for new associations code.

* New associations code by Jeremy Evans (replaces relations code.)

=== 0.4.2 (2008-02-29)

* Fixed one_to_many implicit key to work correctly for namespaced classes (#167).

* Fixed Model.db= to affect the underlying dataset (#183).

* Fixed Model.implicit_table_name to disregard namespaces.

=== 0.4.1 (2008-02-10)

* Implemented Model#inspect (#151).

* Changed Model#method_missing to short-circuit and bypass checking #columns if the values hash already contains the relevant column (#150).

* Updated to reflect changes in sequel_core (Dataset#clone_merge renamed to Dataset#clone).

=== 0.4 (2008-02-05)

* Fixed Model#set to work with string keys (#143).

* Fixed Model.create to correctly initialize instances marked as new (#135).

* Fixed Model#initialize to convert string keys into symbol keys. This also fixes problem with validating objects initialized with string keys (#136).

=== 0.3.3 (2008-01-25)

* Finalized support for virtual attributes.

=== 0.3.2.1 (2008-01-24)

* Fixed Model.dataset to correctly set the dataset if using implicit naming or inheriting the superclass dataset (thanks celldee).

=== 0.3.2 (2008-01-24)

* Added Model#update_with_params method with support for virtual attributes and auto-filtering of unrelated parameters, and changed Model.create_with_params to support virtual attributes (#128).

* Cleaned up gem spec (#132).

* Removed validations code. Now relying on validations in assistance gem.

=== 0.3.1 (2008-01-21)

* Changed Model.dataset to use inflector to pluralize the class name into the table name. Works in similar fashion to table names in AR or DM.

=== 0.3 (2008-01-18)

* Implemented Validatable::Errors class.

* Added Model#reload as alias to Model#refresh.

* Changed Model.create to accept a block (#126).

* Rewrote validations.

* Fixed Model#initialize to accept nil values (#115).

=== 0.2 (2008-01-02)

* Removed deprecated Model.recreate_table method.

* Removed deprecated :class and :on options from one_to_many macro.

* Removed deprecated :class option from one_to_one macro.

* Removed deprecated Model#pkey method.

* Changed dependency to sequel_core.

* Removed examples from sequel core.

* Additional specs. We're now at 100% coverage.

* Refactored hooks code. Hooks are now inheritable, and can be defined by supplying a block or a method name, or by overriding the hook instance method. Hook chains can now be broken by returning false (#111, #112).

=== 0.1 (2007-12-30)

* Moved model code from sequel into separate model sub-project.
