Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/17122#discussion_r104090563
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/WholeStageCodegenExec.scala
---
@@ -206,6 +206,18 @@ trait CodegenSupport extends SparkPlan {
def doConsume(ctx: CodegenContext, input: Seq[ExprCode], row: ExprCode):
String = {
throw new UnsupportedOperationException
}
+
+ /**
+ * for optimization to suppress shouldStop() in a loop of
WholeStageCodegen
+ *
+ * isShouldStopRequired: require to insert shouldStop() into the loop if
true
+ */
+ def isShouldStopRequired: Boolean = {
+ return shouldStopRequired && !(this.parent != null &&
!this.parent.isShouldStopRequired)
+ }
+
+ // set false if doConsume() does not insert append() that requires
shouldStop() in the loop
--- End diff --
Look good, done
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