Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/11658#discussion_r55917330 --- Diff: sql/hive/src/main/scala/org/apache/spark/sql/hive/SQLBuilder.scala --- @@ -54,8 +55,26 @@ class SQLBuilder(logicalPlan: LogicalPlan, sqlContext: SQLContext) extends Loggi def toSQL: String = { val canonicalizedPlan = Canonicalizer.execute(logicalPlan) + val outputNames = logicalPlan.output.map(_.name) + val qualifiers = logicalPlan.output.flatMap(_.qualifiers).distinct + + // Keep the qualifier information by using it as sub-query name, if there is only one qualifier + // present. + val finalName = if (qualifiers.isEmpty || qualifiers.length > 1) { + SQLBuilder.newSubqueryName + } else { + qualifiers.head + } + + // Canonicalizer will remove all naming information, we should add it back by adding an extra + // Project and alias the outputs. + val aliasedOutput = canonicalizedPlan.output.zip(outputNames).map { + case (attr, name) => Alias(attr.withQualifiers(Nil), name)() + } + val finalPlan = Project(aliasedOutput, SubqueryAlias(finalName, canonicalizedPlan)) --- End diff -- Sure, I can do it tomorrow.
--- If your project is set up for it, you can reply to this email and have your reply appear on GitHub as well. If your project does not have this feature enabled and wishes so, or if the feature is enabled but not working, please contact infrastructure at infrastruct...@apache.org or file a JIRA ticket with INFRA. --- --------------------------------------------------------------------- To unsubscribe, e-mail: reviews-unsubscr...@spark.apache.org For additional commands, e-mail: reviews-h...@spark.apache.org