Github user eatoncys commented on a diff in the pull request:
https://github.com/apache/spark/pull/18810#discussion_r132388819
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/WholeStageCodegenExec.scala
---
@@ -370,6 +370,14 @@ case class WholeStageCodegenExec(child: SparkPlan)
extends UnaryExecNode with Co
override def doExecute(): RDD[InternalRow] = {
val (ctx, cleanedSource) = doCodeGen()
+ if (ctx.isTooLongGeneratedFunction) {
+ logWarning("Found too long generated codes and JIT optimization
might not work, " +
+ "Whole-stage codegen disabled for this plan, " +
+ "You can change the config spark.sql.codegen.MaxFunctionLength " +
+ "to adjust the function length limit:\n "
+ + s"$treeString")
+ return child.execute()
+ }
--- End diff --
Ok ,I have added a test, would you like to review it again, thanks.
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