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Subject [GitHub] [spark] cloud-fan commented on a change in pull request #28490: [SPARK-31670][SQL]Resolve Struct Field in Grouping Aggregate with same ExprId
Date Tue, 01 Sep 2020 06:06:23 GMT

cloud-fan commented on a change in pull request #28490:
URL: https://github.com/apache/spark/pull/28490#discussion_r480856230



##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
##########
@@ -1325,24 +1325,43 @@ class Analyzer(
      *
      * Note : In this routine, the unresolved attributes are resolved from the input plan's
      * children attributes.
+     *
+     * @param e the expression need to be resolved.
+     * @param q the LogicalPlan whose children are used to resolve expression's attribute.
+     * @param trimAlias whether need to trim alias of Struct field. When true, we will trim
+     *                  Struct field alias. When isTopLevel = true, we won't trim top-level
+     *                  Struct field alias.
+     * @param isTopLevel whether need to trim top-level alias of Struct field. this param
is

Review comment:
       then we don't need to write doc for `isTopLevel`




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