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.
The name of the prepared statement to deallocate.
Deallocate all prepared statements.
The SQL standard includes a DEALLOCATE statement, but it is only for use in embedded SQL.