viirya commented on a change in pull request #28831:
URL: https://github.com/apache/spark/pull/28831#discussion_r442563136
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
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@@ -182,7 +208,9 @@ case class ConcatWs(children: Seq[Expression])
ev.copy(
code"""
- $codes
+ boolean[] $isNullArgs = new boolean[${children.length - 1}];
+ Object[] $valueArgs = new Object[${children.length - 1}];
+ $argBuilds
Review comment:
Don't we need to evaluate `evals.head.code`? Previously it is in `codes`
but now `argBuilds` only includes `children.tail`.
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