soumyakanti3578 commented on code in PR #5294:
URL: https://github.com/apache/hive/pull/5294#discussion_r1678382641


##########
ql/src/java/org/apache/hadoop/hive/ql/parse/CalcitePlanner.java:
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@@ -5167,7 +5167,14 @@ private RelNode genGBHavingLogicalPlan(QB qb, RelNode 
srcRel) throws SemanticExc
               UnsupportedFeature.Having_clause_without_any_groupby);
         }
         ASTNode targetNode = (ASTNode) havingClause.getChild(0);
-        validateNoHavingReferenceToAlias(qb, targetNode);
+        QBParseInfo qbPI = qb.getParseInfo();
+        Map<ASTNode, String> exprToAlias = qbPI.getAllExprToColumnAlias();
+        RowResolver inputRR = relToHiveRR.get(srcRel);
+        for (ASTNode astNode : exprToAlias.keySet()) {
+          if (inputRR.getExpression(astNode) != null) {
+            inputRR.put("", exprToAlias.get(astNode), 
inputRR.getExpression(astNode));

Review Comment:
   I see that `tableAlias` is an empty string here, and even in non-cbo path it 
is an empty string, but not sure if there is a better way to deal with this. I 
see several instances in the code base where we use empty string for this 
method.



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