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Commita80f5c2

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Mark correctly initial slot snapshots with MVCC type when built
When building an initial slot snapshot, snapshots are marked withhistoric MVCC snapshots as type with the marker field being set inSnapBuildBuildSnapshot() but not overriden in SnapBuildInitialSnapshot().Existing callers of SnapBuildBuildSnapshot() do not care about the typeof snapshot used, but extensions calling it actually may, as reported.Author: Antonin HouskaReviewed-by: Álvaro Herrera, Michael PaquierDiscussion:https://postgr.es/m/23215.1527665193@localhostBackpatch-through: 9.4
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‎src/backend/replication/logical/snapbuild.c

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@@ -617,6 +617,8 @@ SnapBuildInitialSnapshot(SnapBuild *builder)
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TransactionIdAdvance(xid);
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}
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/* adjust remaining snapshot fields as needed */
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snap->satisfies=HeapTupleSatisfiesMVCC;
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snap->xcnt=newxcnt;
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snap->xip=newxip;
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