kiszk commented on a change in pull request #25728: [SPARK-29020][WIP][SQL]
Improving array_sort behaviour
URL: https://github.com/apache/spark/pull/25728#discussion_r324499400
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala
##########
@@ -311,8 +311,73 @@ class DataFrameFunctionsSuite extends QueryTest with
SharedSparkSession {
Seq(Row(2))
)
}
+ test("array_sort with lambda functions") {
- test("sort_array/array_sort functions") {
+ spark.udf.register("fAsc", (x: Int, y: Int) => {
+ if(x < y) -1
+ else if(x == y) 0
+ else 1
+ })
+
+ spark.udf.register("fDesc", (x: Int, y: Int) => {
+ if(x < y) 1
+ else if(x == y) 0
+ else -1
+ })
+
+ spark.udf.register("fString", (x: String, y: String) => {
+ if(x < y) -1
+ else if(x == y) 0
+ else 1
+ })
+
+ spark.udf.register("fStringLength", (x: String, y: String) => {
+ if(x.length < y.length) 1
+ else if(x.length == y.length) 0
+ else -1
+ })
+
+ spark.udf.register("fArraylength", (x: Int, y: Int) => {
+ if(x < y) 1
+ else if(x == y) 0
+ else -1
+ })
+
+
+ val df1 = Seq(Array[Int](3, 2, 5, 1, 2)).toDF("a")
+
+ checkAnswer(
+ df1.selectExpr("array_new_sort(a, (b, i) -> fAsc(b,i))"),
+ Seq(
+ Row(Seq(5, 3, 2, 2, 1))))
+
+ checkAnswer(
+ df1.selectExpr("array_new_sort(a, (b, i) -> fDesc(b,i))"),
+ Seq(
+ Row(Seq(1, 2, 2, 3, 5))))
+
+ val df2 = Seq(Array[String]("bc", "ab", "dc")).toDF("a")
+ checkAnswer(
+ df2.selectExpr("array_new_sort(a, (b, i) -> fString(b,i))"),
+ Seq(
+ Row(Seq("dc", "bc", "ab"))))
+
+ val df3 = Seq(Array[String]("a", "abcd", "abc")).toDF("a")
+ checkAnswer(
+ df3.selectExpr("array_new_sort(a, (b, i) -> fStringLength(b,i))"),
+ Seq(
+ Row(Seq("a", "abc", "abcd"))))
+
+
+ val df4 = Seq((Array[Array[Int]](Array(2, 3, 1), Array(4, 2, 1, 4),
Array(1, 2)), "x")).toDF("a", "b")
+ checkAnswer(
+ df4.selectExpr("array_new_sort(a, (b, i) ->
fArraylength(cardinality(b),cardinality(i)))"),
+ Seq(
+ Row(Seq[Seq[Int]](Seq(1, 2), Seq(2,3,1), Seq(4, 2, 1, 4)))))
+
+ }
+
+ test("sort_array/array_sort functions") {
Review comment:
nit: fix indent position (no indent is required here).
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