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Mark correctly initial slot snapshots with MVCC type when built
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 SnapBuildInitialSnapshot(). 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
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@ -617,6 +617,8 @@ SnapBuildInitialSnapshot(SnapBuild *builder)
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TransactionIdAdvance(xid);
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TransactionIdAdvance(xid);
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}
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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->xcnt = newxcnt;
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snap->xip = newxip;
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snap->xip = newxip;
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