Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/17707#discussion_r112611803
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
---
@@ -214,8 +214,11 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef]
with Logging {
* Create a partition specification map without optional values.
*/
protected def visitNonOptionalPartitionSpec(
- ctx: PartitionSpecContext): Map[String, String] = withOrigin(ctx) {
- visitPartitionSpec(ctx).mapValues(_.orNull).map(identity)
+ ctx: PartitionSpecContext): Map[String, String] = withOrigin(ctx) {
+ visitPartitionSpec(ctx).map {
+ case (key, None) => throw new ParseException(s"Found empty key
'$key'.", ctx)
--- End diff --
How about `Found an empty partition key '$key'`?
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