BUG advisory_lock

<Eugen.Konkov@aldec.com> writes:

EXPECTED: Pg must unlock if function execution failed

This is not a bug; it is the intended and documented behavior
of advisory locks.

regards, tom lane

Eugen.Konkov@aldec.com wrote:

DECLARE
varUnlocked boolean;
BEGIN
varUnlocked:= pg_try_advisory_lock( 783264760123456 ); -- Try to lock function
IF not varUnlocked THEN return NULL; END IF; -- exit if locking is unsucessfull

WRONG QUERY HERE WHICH INTERRUPT EXECUTION

varUnlocked:= pg_advisory_unlock( 783264760123456 ); -- unlock function
END

NEXT time when I run this function I always get NULL until server reboot

EXPECTED: Pg must unlock if function execution failed

You can unlock it in an EXCEPTION block to be safe.

--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.