Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/18747#discussion_r144933968
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/ColumnarBatchScan.scala
---
@@ -84,6 +82,7 @@ private[sql] trait ColumnarBatchScan extends
CodegenSupport {
val columnarBatchClz = classOf[ColumnarBatch].getName
val batch = ctx.freshName("batch")
ctx.addMutableState(columnarBatchClz, batch, s"$batch = null;")
+ val cachedBatch = ctx.freshName("cachedBatch")
--- End diff --
is this needed?
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