beliefer commented on code in PR #37320: URL: https://github.com/apache/spark/pull/37320#discussion_r933220602
########## sql/core/src/test/scala/org/apache/spark/sql/jdbc/JDBCV2Suite.scala: ########## @@ -811,6 +800,244 @@ class JDBCV2Suite extends QueryTest with SharedSparkSession with ExplainSuiteHel checkAnswer(df2, Seq(Row(2, "david", 10000.00))) } + test("scan with aggregate push-down and top N push-down") { + val df1 = spark.read + .table("h2.test.employee") + .groupBy("DEPT").sum("SALARY") + .orderBy("DEPT") + .limit(1) + checkSortRemoved(df1) + checkLimitRemoved(df1) + checkPushedInfo(df1, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT]", + "PushedFilters: []", + "PushedTopN: ORDER BY [DEPT ASC NULLS FIRST] LIMIT 1") + checkAnswer(df1, Seq(Row(1, 19000.00))) + + val df2 = sql( + """ + |SELECT dept AS my_dept, SUM(SALARY) FROM h2.test.employee + |GROUP BY dept + |ORDER BY my_dept + |LIMIT 1 + |""".stripMargin) + checkSortRemoved(df2) + checkLimitRemoved(df2) + checkPushedInfo(df2, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT]", + "PushedFilters: []", + "PushedTopN: ORDER BY [DEPT ASC NULLS FIRST] LIMIT 1") + checkAnswer(df2, Seq(Row(1, 19000.00))) + + val df3 = spark.read + .table("h2.test.employee") + .select($"SALARY", + when(($"SALARY" > 8000).and($"SALARY" < 10000), $"salary").otherwise(0).as("key")) + .groupBy("key").sum("SALARY") + .orderBy("key") + .limit(1) + checkSortRemoved(df3) + checkLimitRemoved(df3) + checkPushedInfo(df3, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: " + + "[CASE WHEN (SALARY > 8000.00) AND (SALARY < 10000.00) THEN SALARY ELSE 0.00 END]", + "PushedFilters: []", + "PushedTopN: ORDER BY [" + + "CASE WHEN (SALARY > 8000.00) AND (SALARY < 10000.00) THEN SALARY ELSE 0.00 END " + + "ASC NULLS FIRST] LIMIT 1") + checkAnswer(df3, Seq(Row(0, 44000.00))) + + val df4 = spark.read + .table("h2.test.employee") + .groupBy("DEPT", "IS_MANAGER").sum("SALARY") + .orderBy("DEPT", "IS_MANAGER") + .limit(1) + checkSortRemoved(df4) + checkLimitRemoved(df4) + checkPushedInfo(df4, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT, IS_MANAGER]", + "PushedFilters: []", + "PushedTopN: ORDER BY [DEPT ASC NULLS FIRST, IS_MANAGER ASC NULLS FIRST] LIMIT 1") + checkAnswer(df4, Seq(Row(1, false, 9000.00))) + + val df5 = sql( + """ + |SELECT dept AS my_dept, is_manager AS my_manager, SUM(SALARY) FROM h2.test.employee + |GROUP BY dept, my_manager + |ORDER BY my_dept, my_manager + |LIMIT 1 + |""".stripMargin) + checkSortRemoved(df5) + checkLimitRemoved(df5) + checkPushedInfo(df5, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT, IS_MANAGER]", + "PushedFilters: []", + "PushedTopN: ORDER BY [DEPT ASC NULLS FIRST, IS_MANAGER ASC NULLS FIRST] LIMIT 1") + checkAnswer(df5, Seq(Row(1, false, 9000.00))) + + val df6 = spark.read + .table("h2.test.employee") + .select($"SALARY", $"IS_MANAGER", + when(($"SALARY" > 8000).and($"SALARY" < 10000), $"salary").otherwise(0).as("key")) + .groupBy("key", "IS_MANAGER").sum("SALARY") + .orderBy("key", "IS_MANAGER") + .limit(1) + checkSortRemoved(df6) + checkLimitRemoved(df6) + checkPushedInfo(df6, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: " + + "[CASE WHEN (SALARY > 8000.00) AND (SALARY < 10000.00) THEN SALARY ELSE 0.00 END, " + + "IS_MANAGER]", + "PushedFilters: []", + "PushedTopN: ORDER BY [" + + "CASE WHEN (SALARY > 8000.00) AND (SALARY < 10000.00) THEN SALARY ELSE 0.00 END " + + "ASC NULLS FIRST, IS_MANAGER ASC NULLS FIRST] LIMIT 1") + checkAnswer(df6, Seq(Row(0.00, false, 12000.00))) + + val df7 = sql( + """ + |SELECT dept, SUM(SALARY) FROM h2.test.employee + |GROUP BY dept + |ORDER BY SUM(SALARY) + |LIMIT 1 + |""".stripMargin) + checkSortRemoved(df7, false) + checkLimitRemoved(df7, false) + checkPushedInfo(df7, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT]", + "PushedFilters: []") + checkAnswer(df7, Seq(Row(6, 12000.00))) + + val df8 = sql( + """ + |SELECT dept, SUM(SALARY) AS total FROM h2.test.employee + |GROUP BY dept + |ORDER BY total + |LIMIT 1 + |""".stripMargin) + checkSortRemoved(df8, false) + checkLimitRemoved(df8, false) + checkPushedInfo(df8, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT]", + "PushedFilters: []") + checkAnswer(df8, Seq(Row(6, 12000.00))) + } + + test("scan with aggregate push-down and paging push-down") { + val df1 = spark.read + .table("h2.test.employee") + .groupBy("DEPT").sum("SALARY") + .orderBy("DEPT") + .offset(1) + .limit(1) + checkSortRemoved(df1) + checkLimitRemoved(df1) + checkPushedInfo(df1, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT]", + "PushedFilters: []", + "PushedOffset: OFFSET 1", + "PushedTopN: ORDER BY [DEPT ASC NULLS FIRST] LIMIT 2") + checkAnswer(df1, Seq(Row(2, 22000.00))) + + val df2 = sql( + """ + |SELECT dept AS my_dept, SUM(SALARY) FROM h2.test.employee + |GROUP BY my_dept + |ORDER BY my_dept + |LIMIT 1 + |OFFSET 1 + |""".stripMargin) + checkSortRemoved(df2) + checkLimitRemoved(df2) + checkPushedInfo(df2, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT]", + "PushedFilters: []", + "PushedOffset: OFFSET 1", + "PushedTopN: ORDER BY [DEPT ASC NULLS FIRST] LIMIT 2") + checkAnswer(df2, Seq(Row(2, 22000.00))) + + val df3 = spark.read + .table("h2.test.employee") + .select($"SALARY", + when(($"SALARY" > 8000).and($"SALARY" < 10000), $"salary").otherwise(0).as("key")) + .groupBy("key").sum("SALARY") + .orderBy("key") + .offset(1) + .limit(1) + checkSortRemoved(df3) + checkLimitRemoved(df3) + checkPushedInfo(df3, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: " + + "[CASE WHEN (SALARY > 8000.00) AND (SALARY < 10000.00) THEN SALARY ELSE 0.00 END]", + "PushedFilters: []", + "PushedOffset: OFFSET 1", + "PushedTopN: ORDER BY [" + + "CASE WHEN (SALARY > 8000.00) AND (SALARY < 10000.00) THEN SALARY ELSE 0.00 END " + + "ASC NULLS FIRST] LIMIT 2") + checkAnswer(df3, Seq(Row(9000, 9000.00))) + + val df4 = sql( + """ + |SELECT dept AS my_dept, is_manager, SUM(SALARY) FROM h2.test.employee + |GROUP BY my_dept, is_manager + |ORDER BY my_dept, is_manager + |LIMIT 1 + |OFFSET 1 + |""".stripMargin) + checkSortRemoved(df4) + checkLimitRemoved(df4) + checkPushedInfo(df4, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT, IS_MANAGER]", + "PushedFilters: []", + "PushedOffset: OFFSET 1", + "PushedTopN: ORDER BY [DEPT ASC NULLS FIRST, IS_MANAGER ASC NULLS FIRST] LIMIT 2") + checkAnswer(df4, Seq(Row(1, true, 10000.00))) + + val df5 = sql( + """ + |SELECT dept, SUM(SALARY) FROM h2.test.employee + |GROUP BY dept + |ORDER BY SUM(SALARY) + |LIMIT 1 + |OFFSET 1 + |""".stripMargin) + checkSortRemoved(df5, false) + checkLimitRemoved(df5, false) + checkPushedInfo(df5, + "PushedAggregates: [SUM(SALARY)]", + "PushedGroupByExpressions: [DEPT]", + "PushedFilters: []") + checkAnswer(df5, Seq(Row(1, 19000.00))) + + val df6 = sql( + """ + |SELECT dept, SUM(SALARY) AS total FROM h2.test.employee + |GROUP BY dept + |ORDER BY total 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