Connection

- NAME
- SYNOPSIS
- DESCRIPTION
- AUTHOR

# NAME

        SQLRelay::Connection - Perl API for SQL Relay

# SYNOPSIS

            use SQLRelay::Connection;
            use SQLRelay::Cursor;

            my $sc=SQLRelay::Connection->new("testhost",9000,"",
                                              "testuser","testpassword",0,1);
            my $ss=SQLRelay::Cursor->new($sc);

            $ss->sendQuery("select table_name from user_tables");
            $sc->endSession();

            for (my $i=0; $i<$ss->rowCount(); $i++) {
                    print $ss->getField($i,"table_name"), "\n";
            }

# DESCRIPTION

        SQLRelay::Connection

            new(server, port, socket, user, password, retrytime, tries);
                # Initiates a connection to "server" on "port"
                # or to the unix "socket" on the local machine
                # and auths with "user" and "password".
                # Failed connections will be retried for
                # "tries" times, waiting "retrytime" seconds between each
                # try.  If "tries" is 0 then retries will continue forever.
                # If "retrytime" is 0 then retries will be attempted on
                # a default interval.
                #
                # If the "socket" parameter is neither
                # NULL nor "" then an attempt will be made to
                # connect through it before attempting to
                # connect to "server" on "port".  If it is
                # NULL or "" then no attempt will be made to
                # connect through the socket.

            DESTROY();
                # Disconnects and ends the session if
                # it hasn't been ended already.

            setConnectTimeout(timeoutsec, timeoutusec);
                # Sets the server connect timeout in seconds and
                # milliseconds.  Setting either parameter to -1 disables the
                # timeout.  You can also set this timeout using the
                # SQLR_CLIENT_CONNECT_TIMEOUT environment variable.

            setAuthenticationTimeout(timeoutsec, timeoutusec);
                # Sets the authentication timeout in seconds and
                # milliseconds.  Setting either parameter to -1 disables the
                # timeout.   You can also set this timeout using the
                # SQLR_CLIENT_AUTHENTICATION_TIMEOUT environment variable. */

            setResponseTimeout(timeoutsec, timeoutusec);
                # Sets the response timeout (for queries, commits, rollbacks,
                # pings, etc.) in seconds and milliseconds.  Setting either
                # parameter to -1 disables the timeout.  You can also set
                # this timeout using the SQLR_CLIENT_RESPONSE_TIMEOUT
                # environment variable.

            enableKerberos(service, mech, flags);
                # Enables Kerberos authentication and encryption.
                #
                #  "service" indicates the Kerberos service name of the
                #  SQL Relay server.  If left empty or NULL then the service
                #  name "sqlrelay" will be used. "sqlrelay" is the default
                #  service name of the SQL Relay server.  Note that on Windows
                #  platforms the service name must be fully qualified,
                #  including the host and realm name.  For example:
                #  "sqlrelay/sqlrserver.firstworks.com@AD.FIRSTWORKS.COM".
                #
                #  "mech" indicates the specific Kerberos mechanism to use.
                #  On Linux/Unix platforms, this should be a string
                #  representation of the mechnaism's OID, such as:
                #      { 1 2 840 113554 1 2 2 }
                #  On Windows platforms, this should be a string like:
                #      Kerberos
                #  If left empty or NULL then the default mechanism will be
                #  used.  Only set this if you know that you have a good
                #  reason to.
                #
                #  "flags" indicates what Kerberos flags to use.  Multiple
                #  flags may be specified, separated by commas.  If left
                #  empty or NULL then a defalt set of flags will be used.
                #  Only set this if you know that you have a good reason to.
                #
                #  Valid flags include:
                #   * GSS_C_MUTUAL_FLAG
                #   * GSS_C_REPLAY_FLAG
                #   * GSS_C_SEQUENCE_FLAG
                #   * GSS_C_CONF_FLAG
                #   * GSS_C_INTEG_FLAG
                #
                #  For a full list of flags, consult the GSSAPI documentation,
                #  though note that only the flags listed above are supported
                #  on Windows.

            enableTls(version, cert, password, ciphers, validate, ca, depth);
                # Enables TLS/SSL encryption, and optionally authentication.
                #
                #  "version" specifies the TLS/SSL protocol version that the
                #  client will attempt to use.  Valid values include SSL2,
                #  SSL3, TLS1, TLS1.1, TLS1.2 or any more recent version of
                #  TLS, as supported by and enabled in the underlying TLS/SSL
                #  library.  If left blank or empty then the highest supported
                #  version will be negotiated.
                #
                #  "cert" is the file name of the certificate chain file to
                #  send to the SQL Relay server.  This is only necessary if
                #  the SQL Relay server is configured to authenticate and
                #  authorize clients by certificate.
                #
                #  If "cert" contains a password-protected private key, then
                #  "password" may be supplied to access it.  If the private
                #  key is not password-protected, then this argument is
                #  ignored, and may be left empty or NULL.
                #
                #  "ciphers" is a list of ciphers to allow.  Ciphers may be
                #  separated by spaces, commas, or colons.  If "ciphers" is
                #  empty or NULL then a default set is used.  Only set this if
                #  you know that you have a good reason to.
                #
                #  For a list of valid ciphers on Linux/Unix platforms, see:
                #      man ciphers
                #
                #  For a list of valid ciphers on Windows platforms, see:
                #      https://msdn.microsoft.com/en-us/library/windows/desktop/aa375549%28v=vs.85%29.aspx
                #  On Windows platforms, the ciphers (alg_id's) should omit
                #  CALG_ and may be given with underscores or dashes.
                #  For example: 3DES_112
                #
                #  "validate" indicates whether to validate the SQL Relay's
                #  server certificate, and may be set to one of the following:
                #      "no" - Don't validate the server's certificate.
                #      "ca" - Validate that the server's certificate was
                #             signed by a trusted certificate authority.
                #      "ca+host" - Perform "ca" validation and also validate
                #             that one of the subject altenate names (or the
                #             common name if no SANs are present) in the
                #             certificate matches the host parameter.
                #             (Falls back to "ca" validation when a unix
                #             socket is used.)
                #      "ca+domain" - Perform "ca" validation and also validate
                #             that the domain name of one of the subject
                #             alternate names (or the common name if no SANs
                #             are present) in the certificate matches the
                #             domain name of the host parameter.  (Falls back
                #             to "ca" validation when a unix socket is used.)
                #
                #  "ca" is the location of a certificate authority file to
                #  use, in addition to the system's root certificates, when
                #  validating the SQL Relay server's certificate.  This is
                #  useful if the SQL Relay server's certificate is self-signed.
                #
                #  On Windows, "ca" must be a file name.
                #
                #  On non-Windows systems, "ca" can be either a file or
                #  directory name.  If it is a directory name, then all
                #  certificate authority files found in that directory will be
                #  used.  If it a file name, then only that file will be used.
                #
                #
                #  Note that the supported "cert" and "ca" file formats may
                #  vary between platforms.  A variety of file formats are
                #  generally supported on Linux/Unix platfoms (.pem, .pfx,
                #  etc.) but only the .pfx format is currently supported on
                #  Windows. */

            disableEncryption();
                # Disables encryption.

            endSession();
                # Ends the session.

            suspendSession();
                # Leaves the session open so another client
                # can connect to it.

            getConnectionPort();
                # Returns the inet port that the client is
                # communicating over. This parameter may be
                # passed to another client for use in
                # the resumeSession() command below.
                # Note: the value returned by this method is
                # only valid after a call to suspendSession().

            getConnectionSocket();
                # Returns the unix socket that the client is
                # communicating over. This parameter may be
                # passed to another client for use in
                # the resumeSession() command below.
                # Note: the value returned by this method is
                # only valid after a call to suspendSession().

            resumeSession(port,socket);
                # Resumes a session previously left open
                # using suspendSession().
                # Returns true on success and false on failure.

            ping();
                # Returns true if the database is up and false
                # if it's down.

            identify();
                # Returns the type of database:
                #   oracle, postgresql, mysql, etc.

            dbVersion();
                # Returns the version of the database

            dbHostName();
                # Returns the host name of the database

            dbIpAddress();
                # Returns the ip address of the database

            serverVersion();
                # Returns the version of the SQL Relay server software

            clientVersion();
                # Returns the version of the SQL Relay client software

            bindFormat();
                # Returns a string representing the format
                # of the bind variables used in the db.

            selectDatabase(database);
                # Sets the current database/schema to "database"
            getCurrentDatabase();
                # Returns the database/schema that is currently in use.

            getLastInsertId();
                # Returns the value of the autoincrement
                # column for the last insert

            autoCommitOn();
                # Instructs the database to perform a commit
                # after every successful query.
                # Returns true if setting autocommit on succeeded
                # and false if it failed.

            autoCommitOff();
                # Instructs the database to wait for the
                # client to tell it when to commit.
                # Returns true if setting autocommit off succeeded
                # and false if it failed.

            begin();
                # Begins a transaction.  Returns true if the begin
                # succeeded, false if it failed.  If the database
                # automatically begins a new transaction when a
                # commit or rollback is issued then this doesn't
                # do anything unless SQL Relay is faking transaction
                # blocks.

            commit();
                # Issues a commit.  Returns true if the commit
                # succeeded, false if it failed.

            rollback();
                # Issues a rollback.  Returns true if the rollback
                # succeeded, false if it failed.

            errorMessage();
                # If an operation failed and generated an error, the
                # error message is available here.  If there is no
                # error then this method returns NULL.

            errorNumber();
                # If an operation failed and generated an
                # error, the error number is available here.
                # If there is no error then this method
                # returns 0.

            debugOn();
                # Causes verbose debugging information to be
                # sent to standard output.  Another way to do
                # this is to start a query with "-- debug\n".
                # Yet another way is to set the environment
                # variable SQLR_CLIENT_DEBUG to "ON"

            debugOff();
                # Turns debugging off.

            getDebug();
                # Returns true if debugging is currently on and false
                # if debugging is currently off.

            setDebugFile(filename);
                # Allows you to specify a file to write debug to.
                # Setting "filename" to NULL or an empty string causes debug
                # to be written to standard output (the default).

            setClientInfo(clientinfo);
                # Allows you to set a string that will be passed to the
                # server and ultimately included in server-side logging
                # along with queries that were run by this instance of
                # the client.

            getClientInfo();
                # Returns the string that was set by setClientInfo().

# AUTHOR

        David Muse
        david.muse@firstworks.com