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https://issues.apache.org/jira/browse/SPARK-23281?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-23281:
------------------------------------
Assignee: Apache Spark
> Query produces results in incorrect order when a composite order by clause
> refers to both original columns and aliases
> ----------------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-23281
> URL: https://issues.apache.org/jira/browse/SPARK-23281
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Dilip Biswal
> Assignee: Apache Spark
> Priority: Major
>
> Here is the test snippet.
> {code}
> scala> Seq[(Integer, Integer)](
> | (1, 1),
> | (1, 3),
> | (2, 3),
> | (3, 3),
> | (4, null),
> | (5, null)
> | ).toDF("key", "value").createOrReplaceTempView("src")
> scala> sql(
> | """
> | |SELECT MAX(value) as value, key as col2
> | |FROM src
> | |GROUP BY key
> | |ORDER BY value desc, key
> | """.stripMargin).show
> +-----+----+
> |value|col2|
> +-----+----+
> | 3| 3|
> | 3| 2|
> | 3| 1|
> | null| 5|
> | null| 4|
> +-----+----+
> {code}
> Here is the explain output :
> {code}
> == Parsed Logical Plan ==
> 'Sort ['value DESC NULLS LAST, 'key ASC NULLS FIRST], true
> +- 'Aggregate ['key], ['MAX('value) AS value#9, 'key AS col2#10]
> +- 'UnresolvedRelation `src`
> == Analyzed Logical Plan ==
> value: int, col2: int
> Project [value#9, col2#10]
> +- Sort [value#9 DESC NULLS LAST, col2#10 DESC NULLS LAST], true
> +- Aggregate [key#5], [max(value#6) AS value#9, key#5 AS col2#10]
> +- SubqueryAlias src
> +- Project [_1#2 AS key#5, _2#3 AS value#6]
> +- LocalRelation [_1#2, _2#3]
> {code}
> The sort direction should be ascending for the 2nd column. Instead its being
> changed
> to descending in Analyzer.resolveAggregateFunctions.
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