Github user bersprockets commented on a diff in the pull request: https://github.com/apache/spark/pull/21621#discussion_r197623576 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala --- @@ -556,6 +556,17 @@ class DataFrameFunctionsSuite extends QueryTest with SharedSQLContext { checkAnswer(df8.selectExpr("arrays_zip(v1, v2)"), expectedValue8) } + test("SPARK-24633: arrays_zip splits input processing correctly") { + Seq("true", "false").foreach { wholestageCodegenEnabled => + withSQLConf(SQLConf.WHOLESTAGE_CODEGEN_ENABLED.key -> wholestageCodegenEnabled) { + val df = spark.range(1) + val exprs = (0 to 5).map(x => array($"id" + lit(x))) --- End diff -- This wasn't splitting input processing for me. Maybe splitExpressionsWithCurrentInputs has a bigger threshold than splitExpressions. Even at 90, it still had not split the input processing. At 100, it finally did. So someplace between 90 and 100, it starts splitting. I might be looking at the wrong thing. Check at your end. <pre> val exprs = (0 to 100).map(x => array($"id" + lit(x))) checkAnswer(df.select(arrays_zip(exprs: _*)), Row(Seq(Row(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100)))) </pre>
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