HeartSaVioR commented on a change in pull request #28831:
URL: https://github.com/apache/spark/pull/28831#discussion_r440592664
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
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@@ -123,26 +123,41 @@ case class ConcatWs(children: Seq[Expression])
val idxVararg = ctx.freshName("idxInVararg")
val evals = children.map(_.genCode(ctx))
+ val supportSplitExpressions =
ctx.supportSplitExpressionsWithCurrentInputs
Review comment:
We may be able to employ some threshold of the number of children or
fallback logic if we want to also exclude the case where the number of blocks
for all three parts are all 1, but that's going to be complicated a bit, so
would like to hear others' voices before applying.
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