maropu commented on a change in pull request #24992: [SPARK-28194][SQL]
Refactor code to prevent None.get in EnsureRequirements
URL: https://github.com/apache/spark/pull/24992#discussion_r298888620
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/EnsureRequirements.scala
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@@ -231,14 +231,15 @@ case class EnsureRequirements(conf: SQLConf) extends
Rule[SparkPlan] {
val keysAndIndexes = currentOrderOfKeys.zipWithIndex
expectedOrderOfKeys.foreach(expression => {
- val index = keysAndIndexes.find { case (e, idx) =>
+ keysAndIndexes.find { case (e, idx) =>
// As we may have the same key used many times, we need to filter out
its occurrence we
// have already used.
e.semanticEquals(expression) && !pickedIndexes.contains(idx)
- }.map(_._2).get
- pickedIndexes += index
- leftKeysBuffer.append(leftKeys(index))
- rightKeysBuffer.append(rightKeys(index))
+ }.map(_._2).map(index => {
Review comment:
If `Set(currentOrderOfKeys) == Set(expectedOrderOfKeys)`, I think we cannot
hit the exception...
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