MySQL 5.5 Reference Manual Including MySQL NDB Cluster 7.2 Reference Guide

13.5.3 DEALLOCATE PREPARE Statement

{DEALLOCATE | DROP} PREPARE stmt_name

To deallocate a prepared statement produced with PREPARE, use a DEALLOCATE PREPARE statement that refers to the prepared statement name. Attempting to execute a prepared statement after deallocating it results in an error.

For examples, see Section 13.5, “Prepared Statements”.