DEALLOCATE — deallocate a prepared statement
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.
PREPARE
This key word is ignored.
plan_name
The name of the prepared statement to deallocate.