From fd182a92ad90e2328c8e1fb601ca41f89a6a5585 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Sat, 16 Oct 2021 12:23:57 -0400 Subject: [PATCH] Make pg_dump acquire lock on partitioned tables that are to be dumped. It was clearly the intent to do so all along, but the original coding fat-fingered this by checking the wrong array element. We fixed it in passing in 403a3d91c, but that later got reverted, and we forgot to keep this bug fix. Most of the time this'd be relatively harmless, since once we lock any of the partitioned table's leaf partitions, that would suffice to prevent major DDL on the partitioned table itself. However, a childless partitioned table would get dumped with no relevant lock whatsoever, possibly allowing dump failure or inconsistent output. Unlike 403a3d91c, there are no versioning concerns, since every server version that has partitioned tables will allow you to lock one. Back-patch to v10 where partitioned tables were introduced. Discussion: https://postgr.es/m/1018205.1634346327@sss.pgh.pa.us --- src/bin/pg_dump/pg_dump.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/bin/pg_dump/pg_dump.c b/src/bin/pg_dump/pg_dump.c index 63efccfa9e..bb17cf3400 100644 --- a/src/bin/pg_dump/pg_dump.c +++ b/src/bin/pg_dump/pg_dump.c @@ -6737,7 +6737,7 @@ getTables(Archive *fout, int *numTables) */ if (tblinfo[i].dobj.dump && (tblinfo[i].relkind == RELKIND_RELATION || - tblinfo->relkind == RELKIND_PARTITIONED_TABLE) && + tblinfo[i].relkind == RELKIND_PARTITIONED_TABLE) && (tblinfo[i].dobj.dump & DUMP_COMPONENTS_REQUIRING_LOCK)) { resetPQExpBuffer(query);