DEALLOCATE — deallocate a prepared statement
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.
PREPARE
This key word is ignored.
name
The name of the prepared statement to deallocate.
ALL
Deallocate all prepared statements.
The SQL standard includes a DEALLOCATE statement, but it is only for use in embedded SQL.