(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Switch autocommit on or off
(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Open a persistent connection to an Ingres database
(PECL ingres >= 1.1.0) Get a meaningful error message for the last error generated
(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Get the precision of a field
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