Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/15704#discussion_r86291653
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
---
@@ -204,6 +207,40 @@ class AstBuilder extends SqlBaseBaseVisitor[AnyRef]
with Logging {
}
/**
+ * Create a partition filter specification.
+ */
+ def visitPartitionFilterSpec(ctx: PartitionSpecContext): Expression =
withOrigin(ctx) {
+ val parts = ctx.partitionVal.asScala.map { pVal =>
+ val name = pVal.identifier.getText
+ val operator = Option(pVal.comparisonOperator).map(_.getText)
+ validate(operator.nonEmpty && !operator.get.equals("<=>"),
+ "'<=>' operator is not allowed in partition specification.", ctx)
--- End diff --
Actually, this is wrong.
```Scala
sql("ALTER TABLE sales DROP PARTITION (country < 'KR', quarter)")
```
The above statement also matches this case, right?
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