Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/14638#discussion_r90098551
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/TableReader.scala ---
@@ -122,10 +126,20 @@ class HadoopTableReader(
val attrsWithIndex = attributes.zipWithIndex
val mutableRow = new SpecificInternalRow(attributes.map(_.dataType))
- val deserializedHadoopRDD = hadoopRDD.mapPartitions { iter =>
+ val deserializedHadoopRDD = hadoopRDD.mapPartitionsWithIndex { (index,
iter) =>
val hconf = broadcastedHadoopConf.value.value
val deserializer = deserializerClass.newInstance()
deserializer.initialize(hconf, tableDesc.getProperties)
+ if (skipHeaderLineCount > 0 && isTextInputFormatTable) {
+ val partition =
hadoopRDD.partitions(index).asInstanceOf[HadoopPartition]
+ if (partition.inputSplit.t.asInstanceOf[FileSplit].getStart() ==
0) {
--- End diff --
is `partition.inputSplit.t.asInstanceOf[FileSplit].getStart() != 0` tested
(for a split that does not start from the start of the file, we do not skip)?
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