server lock id slot

If the lock was not held, false is returned, and in addition, an SQL warning will be reported by the server. seven777 slot pg_advisory_xact_lock ( key bigint) → void pg_advisory_xact_lock ( key1 integer, key2 integer) → void Obtains an exclusive transaction-level advisory lock, waiting if necessary pg_advisory_xact_lock_shared ( key bigint) → void