Thread: pgsql: Prevent parallel index build in a standalone backend.
Prevent parallel index build in a standalone backend. This can't work if there's no postmaster, and indeed the code got an assertion failure trying. There should be a check on IsUnderPostmaster gating the use of parallelism, as the planner has for ordinary parallel queries. Commit 40d964ec9 got this right, so follow its model of checking IsUnderPostmaster at the same place where we check for max_parallel_maintenance_workers == 0. In general, new code implementing parallel utility operations should do the same. Report and patch by Yulin Pei, cosmetically adjusted by me. Back-patch to v11 where this code came in. Discussion: https://postgr.es/m/HK0PR01MB22747D839F77142D7E76A45DF4F50@HK0PR01MB2274.apcprd01.prod.exchangelabs.com Branch ------ REL_12_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/16a1e1ea4fa323d5fc34883cbb2f61eccae8d45f Modified Files -------------- src/backend/optimizer/plan/planner.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)