thomasrebele commented on code in PR #6103:
URL: https://github.com/apache/hive/pull/6103#discussion_r2459471241


##########
ql/src/java/org/apache/hadoop/hive/ql/optimizer/calcite/rules/HiveRelFieldTrimmer.java:
##########
@@ -182,6 +184,7 @@ protected TrimResult trimChild(
       RelNode input,
       final ImmutableBitSet fieldsUsed,
       Set<RelDataTypeField> extraFields) {
+    setColumnAccessInfoForViews(rel, fieldsUsed);

Review Comment:
   I think we need to add a call for the root node somewhere as well.



##########
ql/src/java/org/apache/hadoop/hive/ql/parse/CalcitePlanner.java:
##########
@@ -4918,15 +4919,12 @@ private RelNode genLogicalPlan(QB qb, boolean 
outerMostQB,
 
         aliasToRel.put(subqAlias, relNode);
         if (qb.getViewToTabSchema().containsKey(subqAlias)) {
-          if (relNode instanceof HiveProject) {
-            if (this.viewProjectToTableSchema == null) {
-              this.viewProjectToTableSchema = new LinkedHashMap<>();
-            }
-            viewProjectToTableSchema.put((HiveProject) relNode, 
qb.getViewToTabSchema().get(subqAlias));
-          } else {
-            throw new SemanticException("View " + subqAlias + " is 
corresponding to "
-                + relNode.toString() + ", rather than a HiveProject.");
+          HiveProject project = extractFirstProject(relNode)

Review Comment:
   Thank you for the update, @soumyakanti3578! I think we can simplify it a 
bit, see my [review 
comment](https://github.com/apache/hive/pull/6103/files#r2459466253).



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