Github user navis commented on a diff in the pull request:
https://github.com/apache/spark/pull/8456#discussion_r43711653
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/generators.scala
---
@@ -53,7 +53,7 @@ trait Generator extends Expression {
* The output element data types in structure of Seq[(DataType,
Nullable)]
* TODO we probably need to add more information like metadata etc.
*/
- def elementTypes: Seq[(DataType, Boolean)]
+ def elementTypes: Seq[(DataType, Boolean, Option[String])]
--- End diff --
Right, we can remove Option for field name. I'll update that.
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