DEALLOCATE SQL - Language Statements DEALLOCATE deallocate a prepared statement DEALLOCATE DEALLOCATE [ PREPARE ] plan_name DEALLOCATE is used to deallocate a previously prepared SQL statement. If you do not explicitly deallocate a prepared statement, it is deallocated when the session ends. For more information on prepared statements, see . PREPARE This key word is ignored. plan_name The name of the prepared statement to deallocate. The SQL standard includes a DEALLOCATE statement, but it is only for use in embedded SQL.