gengliangwang commented on code in PR #51236:
URL: https://github.com/apache/spark/pull/51236#discussion_r2162663639
##########
sql/core/src/test/scala/org/apache/spark/sql/DataFrameAggregateSuite.scala:
##########
@@ -2567,6 +2571,266 @@ class DataFrameAggregateSuite extends QueryTest
checkAnswer(df, Row(1.001d, 1, 1) :: Row(6.002d, 1, 1) :: Nil)
}
}
+
+ test("SPARK-52515: test of 1 parameter") {
+ val res = sql(
+ "SELECT approx_top_k(expr) FROM VALUES (0), (0), (1), (1), (2), (3),
(4), (4) AS tab(expr);"
+ )
+ checkAnswer(res, Row(Seq(Row(0, 2), Row(4, 2), Row(1, 2), Row(2, 1),
Row(3, 1))))
+ }
+
+ test("SPARK-52515: test of 2 parameter") {
+ val res = sql(
+ "SELECT approx_top_k(expr, 2) " +
+ "FROM VALUES 'a', 'b', 'c', 'c', 'c', 'c', 'd', 'd' AS tab(expr);")
+ checkAnswer(res, Row(Seq(Row("c", 4), Row("d", 2))))
+ }
+
+ test("SPARK-52515: test of 3 parameter") {
+ val res = sql(
+ "SELECT approx_top_k(expr, 10, 100) FROM VALUES (0), (1), (1), (2), (2),
(2) AS tab(expr);"
+ )
+ checkAnswer(res, Row(Seq(Row(2, 3), Row(1, 2), Row(0, 1))))
+ }
+
+ test("SPARK-52515: test of Integer type") {
+ val res = sql(
+ "SELECT approx_top_k(expr) FROM VALUES (0), (0), (1), (1), (2), (3),
(4), (4) AS tab(expr);"
+ )
+ checkAnswer(res, Row(Seq(Row(0, 2), Row(4, 2), Row(1, 2), Row(2, 1),
Row(3, 1))))
+ }
+
+ test("SPARK-52515: test of String type") {
Review Comment:
what about binary type?
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