FREE (SQL statement)

Releases the resources allocated to a prepared statement.

Syntax

FREE sid
  1. sid is the identifier of the prepared SQL statement.

Usage

The FREE instruction takes the name of a statement as parameter and releases the resources allocated by the PREPARE instruction.

After using FREE, the statement identifier cannot be referenced by a cursor declaration (DECLARE), or by the EXECUTE statement, until you prepare the statement again.

Free the statement if it is not needed anymore, this saves resources on the database client and database server side.

Example

FUNCTION update_customer_name( key, name )
  DEFINE key INTEGER
  DEFINE name CHAR(10)
  PREPARE s1 FROM "UPDATE customer SET name=? WHERE customer_num=?"
  EXECUTE s1 USING name, key 
  FREE s1
END FUNCTION