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-rw-r--r--src/backend/commands/cluster.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/src/backend/commands/cluster.c b/src/backend/commands/cluster.c
index 54a27531825..b1c411a0b96 100644
--- a/src/backend/commands/cluster.c
+++ b/src/backend/commands/cluster.c
@@ -861,6 +861,12 @@ copy_heap_data(Oid OIDNewHeap, Oid OIDOldHeap, Oid OIDOldIndex, bool verbose,
if (TransactionIdPrecedes(FreezeXid, OldHeap->rd_rel->relfrozenxid))
FreezeXid = OldHeap->rd_rel->relfrozenxid;
+ /*
+ * MultiXactCutoff, similarly, shouldn't go backwards either.
+ */
+ if (MultiXactIdPrecedes(MultiXactCutoff, OldHeap->rd_rel->relminmxid))
+ MultiXactCutoff = OldHeap->rd_rel->relminmxid;
+
/* return selected values to caller */
*pFreezeXid = FreezeXid;
*pCutoffMulti = MultiXactCutoff;