NAME

       Rose::DB::Pg - PostgreSQL driver class for Rose::DB.

SYNOPSIS

         use Rose::DB;

         Rose::DB->register_db(
           domain   => 'development',
           type     => 'main',
           driver   => 'Pg',
           database => 'dev_db',
           host     => 'localhost',
           username => 'devuser',
           password => 'mysecret',
           server_time_zone => 'UTC',
           european_dates   => 1,
         );

         Rose::DB->default_domain('development');
         Rose::DB->default_type('main');
         ...

         $db = Rose::DB->new; # $db is really a Rose::DB::Pg-derived object
         ...

DESCRIPTION

       Rose::DB blesses objects into a class derived from Rose::DB::Pg when the driver is "pg".  This mapping of
       driver names to class names is configurable.  See the documentation for Rose::DB's new() and
       driver_class() methods for more information.

       This class cannot be used directly.  You must use Rose::DB and let its new() method return an object
       blessed into the appropriate class for you, according to its driver_class() mappings.

       Only the methods that are new or have different behaviors than those in Rose::DB are documented here.
       See the Rose::DB documentation for the full list of methods.

OBJECT METHODS

       european_dates [BOOL]
           Get or set the boolean value that determines whether or not dates are assumed to be in european
           dd/mm/yyyy format.  The default is to assume US mm/dd/yyyy format (because this is the default for
           PostgreSQL).

           This value will be passed to DateTime::Format::Pg as the value of the "european" parameter in the
           call to the constructor "new()".  This DateTime::Format::Pg object is used by Rose::DB::Pg to parse
           and format date-related column values in methods like parse_date, format_date, etc.

       next_value_in_sequence SEQUENCE
           Advance the sequence named SEQUENCE and return the new value.  Returns undef if there was an error.

       server_time_zone [TZ]
           Get or set the time zone used by the database server software.  TZ should be a time zone name that is
           understood by DateTime::TimeZone.  The default value is "floating".

           This value will be passed to DateTime::Format::Pg as the value of the "server_tz" parameter in the
           call to the constructor "new()".  This DateTime::Format::Pg object is used by Rose::DB::Pg to parse
           and format date-related column values in methods like parse_date, format_date, etc.

           See the DateTime::TimeZone documentation for acceptable values of TZ.

       pg_enable_utf8 [BOOL]
           Get or set the pg_enable_utf8 database handle attribute.  This is set directly on the dbh, if one
           exists.  Otherwise, it will be set when the dbh is created.  If no value for this attribute is
           defined (the default) then it will not be set when the dbh is created, deferring instead to whatever
           default value DBD::Pg chooses.

           Returns the value of this attribute in the dbh, if one exists, or the value that will be set when the
           dbh is next created.

           See the DBD::Pg documentation to learn more about this attribute.

       sslmode [MODE]
           Get or set the SSL mode of the connection.  Valid values for MODE are "disable", "allow", "prefer",
           and "require".  This attribute is used to build the DBI dsn.  Setting it has no effect until the next
           connection.  See the DBD::Pg documentation to learn more about this attribute.

   Value Parsing and Formatting
       format_array ARRAYREF | LIST
           Given a reference to an array or a list of values, return a string formatted according to the rules
           of PostgreSQL's "ARRAY" column type.  Undef is returned if ARRAYREF points to an empty array or if
           LIST is not passed.

       format_interval DURATION
           Given a DateTime::Duration object, return a string formatted according to the rules of PostgreSQL's
           "INTERVAL" column type.  If DURATION is undefined, a DateTime::Duration object, a valid interval
           keyword (according to validate_interval_keyword), or if it looks like a function call (matches
           "/^\w+\(.*\)$/") and keyword_function_calls is true, then it is returned unmodified.

       parse_array STRING
           Parse STRING and return a reference to an array.  STRING should be formatted according to
           PostgreSQL's "ARRAY" data type.  Undef is returned if STRING is undefined.

       parse_interval STRING
           Parse STRING and return a DateTime::Duration object.  STRING should be formatted according to the
           PostgreSQL native "interval" (years, months, days, hours, minutes, seconds) data type.

           If STRING is a DateTime::Duration object, a valid interval keyword (according to
           validate_interval_keyword), or if it looks like a function call (matches "/^\w+\(.*\)$/") and
           keyword_function_calls is true, then it is returned unmodified.  Otherwise, undef is returned if
           STRING could not be parsed as a valid "interval" value.

       validate_date_keyword STRING
           Returns true if STRING is a valid keyword for the PostgreSQL "date" data type.  Valid (case-
           insensitive) date keywords are:

               current_date
               epoch
               now
               now()
               today
               tomorrow
               yesterday

           The keywords are case sensitive.  Any string that looks like a function call (matches
           "/^\w+\(.*\)$/") is also considered a valid date keyword if keyword_function_calls is true.

       validate_datetime_keyword STRING
           Returns true if STRING is a valid keyword for the PostgreSQL "datetime" data type, false otherwise.
           Valid (case-insensitive) datetime keywords are:

               -infinity
               allballs
               current_date
               current_time
               current_time()
               current_timestamp
               current_timestamp()
               epoch
               infinity
               localtime
               localtime()
               localtimestamp
               localtimestamp()
               now
               now()
               timeofday()
               today
               tomorrow
               yesterday

           The keywords are case sensitive.  Any string that looks like a function call (matches
           "/^\w+\(.*\)$/") is also considered a valid datetime keyword if keyword_function_calls is true.

       validate_time_keyword STRING
           Returns true if STRING is a valid keyword for the PostgreSQL "time" data type, false otherwise.
           Valid (case-insensitive) timestamp keywords are:

               allballs
               current_time
               current_time()
               localtime
               localtime()
               now
               now()
               timeofday()

           The keywords are case sensitive.  Any string that looks like a function call (matches
           "/^\w+\(.*\)$/") is also considered a valid timestamp keyword if keyword_function_calls is true.

       validate_timestamp_keyword STRING
           Returns true if STRING is a valid keyword for the PostgreSQL "timestamp" data type, false otherwise.
           Valid (case-insensitive) timestamp keywords are:

               -infinity
               allballs
               current_date
               current_time
               current_time()
               current_timestamp
               current_timestamp()
               epoch
               infinity
               localtime
               localtime()
               localtimestamp
               localtimestamp()
               now
               now()
               timeofday()
               today
               tomorrow
               yesterday

           The keywords are case sensitive.  Any string that looks like a function call (matches
           "/^\w+\(.*\)$/") is also considered a valid timestamp keyword if keyword_function_calls is true.

AUTHOR

       John C. Siracusa (siracusa@gmail.com)

LICENSE

       Copyright (c) 2010 by John C. Siracusa.  All rights reserved.  This program is free software; you can
       redistribute it and/or modify it under the same terms as Perl itself.