jinchengchenghh commented on code in PR #9350:
URL: https://github.com/apache/incubator-gluten/pull/9350#discussion_r2048540098
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backends-velox/src/main/scala/org/apache/gluten/execution/RowToVeloxColumnarExec.scala:
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@@ -168,35 +165,28 @@ object RowToVeloxColumnarExec {
val rowLength = new ListBuffer[Long]()
var rowCount = 0
var offset = 0L
- val sizeInBytes = row.getSizeInBytes
- // allocate buffer based on 1st row, but if first row is very big,
this will cause OOM
- // maybe we should optimize to list ArrayBuf to native to avoid buf
close and allocate
- // 31760L origins from
BaseVariableWidthVector.lastValueAllocationSizeInBytes
- // experimental value
- val estimatedBufSize = Math.max(
- Math.min(sizeInBytes.toDouble * columnBatchSize * 1.2, 31760L *
columnBatchSize),
- sizeInBytes.toDouble * 10)
- arrowBuf = arrowAllocator.buffer(estimatedBufSize.toLong)
- Platform.copyMemory(
- row.getBaseObject,
- row.getBaseOffset,
- null,
- arrowBuf.memoryAddress() + offset,
- sizeInBytes)
- offset += sizeInBytes
- rowLength += sizeInBytes.toLong
- rowCount += 1
-
- convertTime += System.currentTimeMillis() - start
while (rowCount < columnBatchSize && !finished) {
- val iterHasNext = it.hasNext
- if (!iterHasNext) {
+ // The first row does not need to call it.hasNext, otherwise metrics
will be updated repeatedly.
+ if (rowCount != 0 && !it.hasNext) {
Review Comment:
hasNext should allow to call twice, what problem do you meet?
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