From d68742562ca48decbad57adf0014aaed788ce372 Mon Sep 17 00:00:00 2001 From: Andres Freund Date: Sat, 5 Aug 2017 20:52:53 -0700 Subject: Fix thinko introduced in 2bef06d516460 et al. The callers for GetOldestSafeDecodingTransactionId() all inverted the argument for the argument introduced in 2bef06d516460. Luckily this appears to be inconsequential for the moment, as we wait for concurrent in-progress transaction when assembling a snapshot. Additionally this could only make a difference when adding a second logical slot, because only a pre-existing slot could cause an issue by lowering the returned xid dangerously much. Reported-By: Antonin Houska Discussion: https://postgr.es/m/32704.1496993134@localhost Backport: 9.4-, where 2bef06d516460 was backpatched to. --- src/backend/replication/logical/logical.c | 2 +- src/backend/replication/logical/snapbuild.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'src') diff --git a/src/backend/replication/logical/logical.c b/src/backend/replication/logical/logical.c index 6a570d0e810..3745edb445d 100644 --- a/src/backend/replication/logical/logical.c +++ b/src/backend/replication/logical/logical.c @@ -327,7 +327,7 @@ CreateInitDecodingContext(char *plugin, */ LWLockAcquire(ProcArrayLock, LW_EXCLUSIVE); - xmin_horizon = GetOldestSafeDecodingTransactionId(need_full_snapshot); + xmin_horizon = GetOldestSafeDecodingTransactionId(!need_full_snapshot); slot->effective_catalog_xmin = xmin_horizon; slot->data.catalog_xmin = xmin_horizon; diff --git a/src/backend/replication/logical/snapbuild.c b/src/backend/replication/logical/snapbuild.c index 9359fc2386d..03ca4ba6f61 100644 --- a/src/backend/replication/logical/snapbuild.c +++ b/src/backend/replication/logical/snapbuild.c @@ -595,7 +595,7 @@ SnapBuildExportSnapshot(SnapBuild *builder) TransactionId safeXid; LWLockAcquire(ProcArrayLock, LW_SHARED); - safeXid = GetOldestSafeDecodingTransactionId(true); + safeXid = GetOldestSafeDecodingTransactionId(false); LWLockRelease(ProcArrayLock); Assert(TransactionIdPrecedesOrEquals(safeXid, snap->xmin)); -- cgit v1.2.3