Is it possible to lock a table for a specified time in PostgreSQL database by running psql commands via shell script or sql file?
If we run the LOCK TABLE command, when the script exits the lock will also be gone, so that is not sufficient.
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2Why do you want to lock a table for a longer time than the script? You are probably doing something wrong.LtWorf– LtWorf2013-06-14 08:28:15 +00:00Commented Jun 14, 2013 at 8:28
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2 Answers
Use pg_sleep for your specified time in conjunction with LOCK TABLE? Something like the script below should lock a table for 60 seconds (note this is untested):
BEGIN WORK;
LOCK TABLE MyTable IN ACCESS EXCLUSIVE MODE;
SELECT pg_sleep(60);
COMMIT WORK;
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Talvalin
If the suggested script works, then please mark this as the accepted answer and upvote when possible. :)
You can use pg_sleep(), pg_sleep_for() and pg_sleep_until() to lock a table for a specified time as shown below according to Delaying Execution:
BEGIN;
LOCK TABLE person;
SELECT pg_sleep(10);
COMMIT;
BEGIN;
LOCK TABLE person;
SELECT pg_sleep_for('20 seconds');
COMMIT;
BEGIN;
LOCK TABLE person;
SELECT pg_sleep_for('3 minutes');
COMMIT;
BEGIN;
LOCK TABLE person;
SELECT pg_sleep_until('today 21:45');
COMMIT;
BEGIN;
LOCK TABLE person;
SELECT pg_sleep_until('tomorrow 03:00');
COMMIT;
answered Jan 5, 2023 at 13:20
Super Kai - Kazuya Ito
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