Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/13730#discussion_r67462488
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/PartitioningUtils.scala
---
@@ -339,6 +339,9 @@ private[sql] object PartitioningUtils {
private val upCastingOrder: Seq[DataType] =
Seq(NullType, IntegerType, LongType, FloatType, DoubleType, StringType)
+ /**
+ * Validate partition columns for writing executions.
+ */
--- End diff --
Since `validatePartitionColumn` is used for only writing-related classes, I
added this description for clarification.
We can update the function description if the usage pattern is changed in
the future.
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