rdelaage/postgresql
1
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2024-07-21 08:59:39 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fix thinko introduced in 2bef06d516 et al.

Browse Source 
The callers for GetOldestSafeDecodingTransactionId() all inverted the
argument for the argument introduced in 2bef06d516. 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 2bef06d516 was backpatched to.
This commit is contained in:
Andres Freund 2017-08-05 20:52:53 -07:00
parent f27449fcca
commit 32d7480e02
2 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/backend/replication/logical/logical.c
View File

@ -284,7 +284,7 @@ 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;

2
src/backend/replication/logical/snapbuild.c
View File

@ -592,7 +592,7 @@ SnapBuildExportSnapshot(SnapBuild *builder)
TransactionId safeXid;
LWLockAcquire(ProcArrayLock, LW_SHARED);
safeXid = GetOldestSafeDecodingTransactionId(true);
safeXid = GetOldestSafeDecodingTransactionId(false);
LWLockRelease(ProcArrayLock);
Assert(TransactionIdPrecedesOrEquals(safeXid, snap->xmin));