cloud-fan commented on a change in pull request #34575:
URL: https://github.com/apache/spark/pull/34575#discussion_r772888602
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileScanRDD.scala
##########
@@ -103,6 +116,108 @@ class FileScanRDD(
context.killTaskIfInterrupted()
(currentIterator != null && currentIterator.hasNext) || nextIterator()
}
+
+ ///////////////////////////
+ // FILE METADATA METHODS //
+ ///////////////////////////
+
+ // metadata columns unsafe row, will only be updated when the current
file is changed
+ @volatile private var metadataColumnsUnsafeRow: UnsafeRow = _
+ // metadata columns internal row, will only be updated when the current
file is changed
+ @volatile private var metadataColumnsInternalRow: InternalRow = _
+ // an unsafe joiner to join an unsafe row with the metadata unsafe row
+ lazy private val metadataUnsafeRowJoiner =
Review comment:
nit: `private lazy val`
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