Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/6723#discussion_r32077703
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypes.scala
---
@@ -29,11 +30,16 @@ case class CreateArray(children: Seq[Expression])
extends Expression {
lazy val childTypes = children.map(_.dataType).distinct
- override lazy val resolved =
- childrenResolved && childTypes.size <= 1
+ override def checkInputDataTypes(): TypeCheckResult = {
+ if (childTypes.size > 1) {
+ TypeCheckResult.TypeCheckFailure(
+ "children of CreateArray should all be same type")
--- End diff --
maybe this?
```
"Input to array function should all be the same type. Input types " +
childTypes.mkString("[", ", ", "]")
```
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