GET OPTIMIZATION LEVEL [ { TO | INTO } <variable> ]
| GET OPTIMIZATION LIMIT [ { TO | INTO } <variable> ]
| GET OPTIMIZATION COST [ OF ]
<stringliteral> [ { TO | INTO } <variable> ]
SET OPTIMIZATION LEVEL [ TO | = ] <opt level spec>
| SET OPTIMIZATION LIMIT [ TO | = ] <opt limit spec>
| SET OPTIMIZATION COST [ OF ] <string literal> [ TO | = ] <expression>
{ ON | OFF }
| <unsigned integer literal>
| <variable>
<unsigned integer literal> | <variable>