dongjoon-hyun commented on code in PR #47843:
URL: https://github.com/apache/spark/pull/47843#discussion_r1729207423
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TableOutputResolver.scala:
##########
@@ -413,8 +413,16 @@ object TableOutputResolver extends SQLConfHelper with
Logging {
resolveColumnsByPosition(tableName, Seq(param), Seq(fakeAttr), conf,
addError, colPath)
}
if (res.length == 1) {
- val func = LambdaFunction(res.head, Seq(param))
- Some(Alias(ArrayTransform(nullCheckedInput, func), expected.name)())
+ if (res.head == param) {
+ // If the element type is the same, we can reuse the input array
directly.
+ Some(
+ Alias(nullCheckedInput, expected.name)(
+ nonInheritableMetadataKeys =
+ Seq(CharVarcharUtils.CHAR_VARCHAR_TYPE_STRING_METADATA_KEY)))
Review Comment:
cc @cloud-fan
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