cloud-fan commented on a change in pull request #24209: [SPARK-27255][SQL]
Aggregate functions should not be allowed in WHERE
URL: https://github.com/apache/spark/pull/24209#discussion_r269884151
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File path: sql/core/src/test/resources/sql-tests/inputs/group-by.sql
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@@ -141,3 +141,11 @@ SELECT every("true");
SELECT k, v, every(v) OVER (PARTITION BY k ORDER BY v) FROM test_agg;
SELECT k, v, some(v) OVER (PARTITION BY k ORDER BY v) FROM test_agg;
SELECT k, v, any(v) OVER (PARTITION BY k ORDER BY v) FROM test_agg;
+
+-- Aggrgate expressions can be referenced through an alias
+SELECT * FROM (SELECT COUNT(*) AS cnt FROM test_agg) WHERE cnt > 1;
+
+-- Error when aggregate expressions are in where clause directly
+SELECT count(*) FROM test_agg WHERE count(*) > 1;
Review comment:
can we test HAVING as well?
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