On Mon, Nov 11, 2019 at 09:19:52AM +0000, PG Doc comments form wrote: > The documentation says that TRUNCATE ignores ON DELETE triggers, but it > doesn't explicitly mention what happens if we use `wal_level = logical` and > `REPLICA IDENTITY FULL`. Does TRUNCATE emit changes for each row and clog > the WAL, or will it still be blazing fast?
Truncate does not issue per-row changes with a full replica identity in this context. It roughly just takes an exclusive lock on the table, then physically removes all the files related to the table. -- Michael
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