ngsg commented on code in PR #4043:
URL: https://github.com/apache/hive/pull/4043#discussion_r1387525437
##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/ParallelEdgeFixer.java:
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@@ -325,6 +331,11 @@ public static Optional<Set<String>>
colMappingInverseKeys(ReduceSinkOperator rs)
Map<String, String> ret = new HashMap<String, String>();
Map<String, ExprNodeDesc> exprMap = rs.getColumnExprMap();
Set<String> neededColumns = new HashSet<String>();
+
+ if
(!rs.getSchema().getColumnNames().stream().allMatch(exprMap::containsKey)) {
Review Comment:
Sure, I removed neededColumns and added comments to explain the reason for
inversion failure.
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