Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/19964#discussion_r156675877
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
---
@@ -289,53 +289,56 @@ case class Elt(children: Seq[Expression])
val index = indexExpr.genCode(ctx)
val strings = stringExprs.map(_.genCode(ctx))
val indexVal = ctx.freshName("index")
+ val resultState = ctx.freshName("eltResultState")
--- End diff --
Ok.
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