Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/22731#discussion_r225337806
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileScanRDD.scala
---
@@ -106,15 +106,16 @@ class FileScanRDD(
// don't need to run this `if` for every record.
val preNumRecordsRead = inputMetrics.recordsRead
if (nextElement.isInstanceOf[ColumnarBatch]) {
+ incTaskInputMetricsBytesRead()
--- End diff --
Makes sense. In this case the behavior should be the same before and after
this change, but it's therefore fine, too.
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