Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/19811#discussion_r156928231
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/DataSourceScanExec.scala
---
@@ -110,8 +110,8 @@ case class RowDataSourceScanExec(
override protected def doProduce(ctx: CodegenContext): String = {
val numOutputRows = metricTerm(ctx, "numOutputRows")
// PhysicalRDD always just has one input
- val input = ctx.freshName("input")
- ctx.addMutableState("scala.collection.Iterator", input, s"$input =
inputs[0];")
+ val input = ctx.addMutableState("scala.collection.Iterator", "input",
v => s"$v = inputs[0];",
+ forceInline = true)
--- End diff --
why inline
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