<command>UPDATE</command>, and <command>DELETE</command>), as well as

other SQL commands. (You cannot use transaction control commands, e.g.

<command>COMMIT</>, <command>SAVEPOINT</>, and some utility

commands, e.g. <literal>VACUUM</>,into an<acronym>SQL</acronym>function.)

commands, e.g. <literal>VACUUM</>,in<acronym>SQL</acronym>functions.)

However, the final command

must be a <command>SELECT</command> or have a <literal>RETURNING</>

clause that returns whatever is