Hi,

Attached does:

     Index       childRTindex;
     AppendRelInfo *appinfo;

-    /* Open rel if needed; we already have required locks */
+    /* Open rel if needed; we already have acquired locks */
     if (childOID != parentOID)
         newrelation = heap_open(childOID, NoLock);
     else

Does that make sense?

Thanks,
Amit
diff --git a/src/backend/optimizer/prep/prepunion.c b/src/backend/optimizer/prep/prepunion.c
index 51b3da2..b0cb818 100644
--- a/src/backend/optimizer/prep/prepunion.c
+++ b/src/backend/optimizer/prep/prepunion.c
@@ -1317,7 +1317,7 @@ expand_inherited_rtentry(PlannerInfo *root, RangeTblEntry *rte, Index rti)
 		Index		childRTindex;
 		AppendRelInfo *appinfo;
 
-		/* Open rel if needed; we already have required locks */
+		/* Open rel if needed; we already have acquired locks */
 		if (childOID != parentOID)
 			newrelation = heap_open(childOID, NoLock);
 		else
-- 
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