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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/03/10 03:51:00 UTC
[jira] [Commented] (SPARK-38489) Aggregate.groupOnly support foldable expressions
[ https://issues.apache.org/jira/browse/SPARK-38489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17503984#comment-17503984 ]
Apache Spark commented on SPARK-38489:
--------------------------------------
User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/35795
> Aggregate.groupOnly support foldable expressions
> ------------------------------------------------
>
> Key: SPARK-38489
> URL: https://issues.apache.org/jira/browse/SPARK-38489
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: Yuming Wang
> Priority: Major
>
> {code:scala}
> spark.range(200L).selectExpr("id AS a").createTempView("t1")
> spark.range(300L).selectExpr("id AS b").createTempView("t2")
> spark.sql("SELECT DISTINCT a AS newAlias FROM t1 LEFT JOIN t2 ON a = b").explain(true)
> {code}
> Expected optimized plan:
> {noformat}
> == Optimized Logical Plan ==
> Aggregate [newAlias#8L], [newAlias#8L]
> +- Project [id#0L AS newAlias#8L]
> +- Range (0, 200, step=1, splits=Some(2))
> {noformat}
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