Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/6853#discussion_r32770725
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -315,25 +315,20 @@ class Analyzer(
if
AttributeSet(windowExpressions.map(_.toAttribute)).intersect(conflictingAttributes)
.nonEmpty =>
(oldVersion, oldVersion.copy(windowExpressions =
newAliases(windowExpressions)))
- }.headOption.getOrElse { // Only handle first case, others will be
fixed on the next pass.
- sys.error(
- s"""
- |Failure when resolving conflicting references in Join:
- |$plan
- |
- |Conflicting attributes:
${conflictingAttributes.mkString(",")}
- """.stripMargin)
- }
-
- val attributeRewrites =
AttributeMap(oldRelation.output.zip(newRelation.output))
- val newRight = right transformUp {
- case r if r == oldRelation => newRelation
- } transformUp {
- case other => other transformExpressions {
- case a: Attribute => attributeRewrites.get(a).getOrElse(a)
- }
+ }.headOption match {
--- End diff --
Actually, you can probably ignore my foreach suggestion now that I look
closer, but I do want better comments explaining why its okay to ignore
conflicts here.
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