maropu commented on a change in pull request #25666: [SPARK-28962][SQL] Provide
index argument to filter lambda functions
URL: https://github.com/apache/spark/pull/25666#discussion_r329832005
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/higherOrderFunctions.scala
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@@ -369,6 +383,9 @@ case class ArrayFilter(
var i = 0
while (i < arr.numElements) {
elementVar.value.set(arr.get(i, elementVar.dataType))
+ if (indexVar.isDefined) {
Review comment:
Can you avoid this per-row check? The current code causes unnecessary
runtime overheads.
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