30.4.4.3 The execute_prepared_stmt() Procedure

Given an SQL statement as a string, executes it as a prepared statement. The prepared statement is deallocated after execution, so it is not subject to reuse. Thus, this procedure is useful primarily for executing dynamic statements on a one-time basis.

This procedure uses sys_execute_prepared_stmt as the prepared statement name. If that statement name exists when the procedure is called, its previous content is destroyed.

Parameters

• in_query LONGTEXT CHARACTER SET utf8mb3: The statement string to execute.

Configuration Options

execute_prepared_stmt() operation can be modified using the following configuration options or their corresponding user-defined variables (see Section 30.4.2.1, “The sys_config Table”):

• debug, @sys.debug

  If this option is ON, produce debugging output. The default is OFF.

Example

mysql> CALL sys.execute_prepared_stmt('SELECT COUNT(*) FROM mysql.user');
+----------+
| COUNT(*) |
+----------+
|       15 |
+----------+