pdo_pgsql: add support for dollar-quotes RFC: http://wiki.php.net/rfc/pdo_driver_specific_parsers
pdo_pgsql: add support for "escape" string literals RFC: http://wiki.php.net/rfc/pdo_driver_specific_parsers
Implemented PDO Driver specific SQL parsers RFC: http://wiki.php.net/rfc/pdo_driver_specific_parsers