At least in PG, that is explicitly not the case, unless I’m misunderstanding:
Similarly, a PL/pgSQL loop of the form FOR x IN query LOOP … END LOOP will never use a parallel plan, because the parallel query system is unable to verify that the code in the loop is safe to execute while parallel query is active.
whats_a_lemmy@midwest.social 3 weeks ago
At least in PG, that is explicitly not the case, unless I’m misunderstanding:
postgresql.org/…/when-can-parallel-query-be-used.…
At any rate, I feel like it’s questionable design to have a user making row-by-row decisions on hard deletes.