Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17929#discussion_r115637455
--- Diff: sql/core/src/test/resources/sql-tests/inputs/group-by.sql ---
@@ -53,3 +53,13 @@ set spark.sql.groupByAliases=false;
-- Check analysis exceptions
SELECT a AS k, COUNT(b) FROM testData GROUP BY k;
+
+-- turn on group by aliases (for remaining tests)
+set spark.sql.groupByAliases=true;
--- End diff --
why do we need to turn on `groupByAliases`? seems following tests don't use
this feature
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