Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/17436#discussion_r151764870
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryTableScanExec.scala
---
@@ -62,7 +69,11 @@ case class InMemoryTableScanExec(
private def createAndDecompressColumn(cachedColumnarBatch: CachedBatch):
ColumnarBatch = {
val rowCount = cachedColumnarBatch.numRows
- val columnVectors = OnHeapColumnVector.allocateColumns(rowCount,
columnarBatchSchema)
+ val columnVectors = if (!conf.offHeapColumnVectorEnabled) {
--- End diff --
only enable it when `TaskContext.get != null`?
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