(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Test if a field is nullable

(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Get the scale of a field

(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Roll back a transaction

(PECL ingres >= 1.1.0) Get the last SQLSTATE error code generated

(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Get the number of fields returned by the last

(PECL ingres >= 2.1.0) Set the row position before fetching data

(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) Open a persistent connection to an Ingres database

(PHP 4 >= 4.0.2, PHP 5 <= 5.0.5, PECL ingres >= 1.0.0) Get the precision of a field

(PECL ingres >= 2.1.0) Returns the installation character set