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Mark correctly initial slot snapshots with MVCC type when built

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When building an initial slot snapshot, snapshots are marked with
historic MVCC snapshots as type with the marker field being set in
SnapBuildBuildSnapshot() but not overriden in SnapBuildExportSnapshot().
Existing callers of SnapBuildBuildSnapshot() do not care about the type
of snapshot used, but extensions calling it actually may, as reported.

Author: Antonin Houska
Reviewed-by: Álvaro Herrera, Michael Paquier
Discussion: https://postgr.es/m/23215.1527665193@localhost
Backpatch-through: 9.4
This commit is contained in:
Michael Paquier 2019-02-20 12:32:23 +09:00
parent 64f6a65a00
commit 2ad57e9e9f
1 changed files with 2 additions and 0 deletions
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2
src/backend/replication/logical/snapbuild.c
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@ -636,6 +636,8 @@ SnapBuildExportSnapshot(SnapBuild *builder)
TransactionIdAdvance(xid); TransactionIdAdvance(xid);
} }
/* adjust remaining snapshot fields as needed */
snap->satisfies = HeapTupleSatisfiesMVCC;
snap->xcnt = newxcnt; snap->xcnt = newxcnt;
snap->xip = newxip; snap->xip = newxip;