beliefer commented on a change in pull request #27058: [SPARK-30276][SQL] 
Support Filter expression allows simultaneous use of DISTINCT
URL: https://github.com/apache/spark/pull/27058#discussion_r368849071
 
 

 ##########
 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/RewriteDistinctAggregates.scala
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 @@ -118,7 +118,66 @@ import org.apache.spark.sql.types.IntegerType
  *       LocalTableScan [...]
  * }}}
  *
- * The rule does the following things here:
+ * Third example: single distinct aggregate function with filter clauses (in 
sql):
 
 Review comment:
   OK

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