Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7060#discussion_r33440738
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/stat/StatFunctions.scala
---
@@ -119,14 +119,14 @@ private[sql] object StatFunctions extends Logging {
rows.foreach { (row: Row) =>
// row.get(0) is column 1
// row.get(1) is column 2
- // row.get(3) is the frequency
+ // row.get(2) is the frequency
countsRow.setLong(distinctCol2.get(row.get(1)).get + 1,
row.getLong(2))
}
// the value of col1 is the first value, the rest are the counts
countsRow.setString(0, col1Item.toString)
countsRow
}.toSeq
- val headerNames = distinctCol2.map(r => StructField(r._1.toString,
LongType)).toSeq
+ val headerNames = distinctCol2.toSeq.sortBy(_._2).map(r =>
StructField(r._1.toString, LongType))
--- End diff --
maybe add inline comment explaining what _2 is?
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