Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/13663#discussion_r67213607
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
---
@@ -60,18 +60,24 @@ case class CreateArray(children: Seq[Expression])
extends Expression {
ctx.INPUT_ROW,
children.zipWithIndex.map { case (e, i) =>
val eval = e.genCode(ctx)
- eval.code + s"""
- if (${eval.isNull}) {
--- End diff --
Let me change my opinion. Another PR will handle this elimination and
related features.
This PR will focus on "each element of project_values is null if it never
occurs".
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