Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/10630#discussion_r51059167 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala --- @@ -388,57 +445,18 @@ class Analyzer( .map(_.asInstanceOf[NamedExpression]) a.copy(aggregateExpressions = expanded) - // Special handling for cases when self-join introduce duplicate expression ids. - case j @ Join(left, right, _, _) if !j.selfJoinResolved => - val conflictingAttributes = left.outputSet.intersect(right.outputSet) - logDebug(s"Conflicting attributes ${conflictingAttributes.mkString(",")} in $j") - - right.collect { - // Handle base relations that might appear more than once. - case oldVersion: MultiInstanceRelation - if oldVersion.outputSet.intersect(conflictingAttributes).nonEmpty => - val newVersion = oldVersion.newInstance() - (oldVersion, newVersion) - - // Handle projects that create conflicting aliases. - case oldVersion @ Project(projectList, _) - if findAliases(projectList).intersect(conflictingAttributes).nonEmpty => - (oldVersion, oldVersion.copy(projectList = newAliases(projectList))) - - case oldVersion @ Aggregate(_, aggregateExpressions, _) - if findAliases(aggregateExpressions).intersect(conflictingAttributes).nonEmpty => - (oldVersion, oldVersion.copy(aggregateExpressions = newAliases(aggregateExpressions))) - - case oldVersion: Generate - if oldVersion.generatedSet.intersect(conflictingAttributes).nonEmpty => - val newOutput = oldVersion.generatorOutput.map(_.newInstance()) - (oldVersion, oldVersion.copy(generatorOutput = newOutput)) - - case oldVersion @ Window(_, windowExpressions, _, _, child) - if AttributeSet(windowExpressions.map(_.toAttribute)).intersect(conflictingAttributes) - .nonEmpty => - (oldVersion, oldVersion.copy(windowExpressions = newAliases(windowExpressions))) - } - // Only handle first case, others will be fixed on the next pass. - .headOption match { - case None => - /* - * No result implies that there is a logical plan node that produces new references - * that this rule cannot handle. When that is the case, there must be another rule - * that resolves these conflicts. Otherwise, the analysis will fail. - */ - j - case Some((oldRelation, newRelation)) => - 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) - } - } - j.copy(right = newRight) - } + // To resolve duplicate expression IDs for all the BinaryNode + case b: BinaryNode if !b.duplicateResolved => b match { + case j @ Join(left, right, _, _) => + j.copy(right = dedupRight(left, right)) + case i @ Intersect(left, right) => + i.copy(right = dedupRight(left, right)) + case e @ Except(left, right) => + e.copy(right = dedupRight(left, right)) + case cg: CoGroup => --- End diff -- In this case, it should work! Let me know if we should deduplicate the expression IDs for the other operators. Thanks!
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