Statement.cancel () and its security guarantee (s)

Question

Unfortunately, the jdbc specification is silent on warranties Statement.cancel().

The only thing javadoc pointed out is that it Statement.cancel()is a thread safe .
But:

• Is it guaranteed to cancel()always work? (so that the thread that is currently executing Statementis immediately unlocked and continues)
• Is it guaranteed that cancel()it will not be blocked and (more or less) immediately return?

Answer 1

Is it guaranteed that the cancel () function will always work?

. , . , , UnsupportedOperationException

, cancel() ( )

. cancel() . , .

Answer 2

javadoc:

, SQL

. , Statement.cancel() , , Java RE.

, , /.