This commit implements optimizer hints allowing to affect the order
of joining tables:
- JOIN_FIXED_ORDER similar to existing STRAIGHT_JOIN hint;
- JOIN_ORDER to apply the specified table order;
- JOIN_PREFIX to hint what tables should be first in the join;
- JOIN_SUFFIX to hint what tables should be last in the join.
It places a limit N (a timeout value in milliseconds) on how long
a statement is permitted to execute before the server terminates it.
Syntax:
SELECT /*+ MAX_EXECUTION_TIME(milliseconds) */ ...
Only top-level SELECT statements support the hint.
