Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/13095#discussion_r63151860
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
---
@@ -220,11 +220,18 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef]
with Logging {
*/
override def visitPartitionSpec(
ctx: PartitionSpecContext): Map[String, Option[String]] =
withOrigin(ctx) {
- ctx.partitionVal.asScala.map { pVal =>
+ val parts = ctx.partitionVal.asScala.map { pVal =>
val name = pVal.identifier.getText.toLowerCase
val value = Option(pVal.constant).map(visitStringConstant)
name -> value
- }.toMap
+ }
+ // Check for duplicate partition columns in one spec.
+ parts.groupBy(_._1).filter(_._2.size > 1).foreach {
+ case (name, _) =>
--- End diff --
(it seems putting the case in the same line is preferred `foreach { case
(name, _) =>`,
[scala-style-guide#pattern-matching](https://github.com/databricks/scala-style-guide#pattern-matching))
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