Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18418#discussion_r124223602
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeCreator.scala
---
@@ -342,19 +343,38 @@ case class CreateNamedStruct(children:
Seq[Expression]) extends CreateNamedStruc
val values = ctx.freshName("values")
ctx.addMutableState("Object[]", values, s"$values = null;")
+ // `splitExpressions` might split codes to multiple functions. The
local variables of
+ // `LambdaVariable` can't be accessed in the functions. We need to add
them into the parameters
+ // of the functions.
+ val (valExprCodes, valExprParams) = valExprs.map { expr =>
+ val exprCode = expr.genCode(ctx)
+ val lambdaVars = expr.collect {
--- End diff --
This approach doesn't work well after rethinking about this and more
experiments.
A simpler approach is letting those lambda variables global as MapObjects`
and `CollectObjectsToMap` do.
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