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ingres_pconnect(PHP 4 >= 4.0.2, PHP 5 <= 5.0.4) ingres_pconnect -- Open a persistent connection to an Ingres II databaseDescriptionresource ingres_pconnect ( [string database [, string username [, string password]]] )Returns a Ingres II link resource on success, or FALSE on failure. See ingres_connect() for parameters details and examples. There are only 2 differences between ingres_pconnect() and ingres_connect() : First, when connecting, the function will first try to find a (persistent) link that's already opened with the same parameters. If one is found, an identifier for it will be returned instead of opening a new connection. Second, the connection to the Ingres server will not be closed when the execution of the script ends. Instead, the link will remain open for future use (ingres_close() will not close links established by ingres_pconnect()). This type of link is therefore called 'persistent'. See also ingres_connect() and ingres_close().  add a note
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ingres_num_rows