HyukjinKwon commented on a change in pull request #24182:
[SPARK-27246][SQL]scalar subquery with no column test fails as it is throwing
NoSuchElementException instead of AnalysisException
URL: https://github.com/apache/spark/pull/24182#discussion_r268591718
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/subquery.scala
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@@ -248,7 +248,10 @@ case class ScalarSubquery(
children: Seq[Expression] = Seq.empty,
exprId: ExprId = NamedExpression.newExprId)
extends SubqueryExpression(plan, children, exprId) with Unevaluable {
- override def dataType: DataType = plan.schema.fields.head.dataType
+ override def dataType: DataType = {
+ assert(!plan.schema.fields.isEmpty, "scalar subquery does not have any
column")
Review comment:
Also, the message looks a bit odd. It should rather be `Scala subquery
should have only one column`
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