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Posted to issues@spark.apache.org by "Wenchen Fan (Jira)" <ji...@apache.org> on 2022/07/13 06:07:00 UTC
[jira] [Assigned] (SPARK-39651) Prune filter condition if compare with rand is deterministic
[ https://issues.apache.org/jira/browse/SPARK-39651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wenchen Fan reassigned SPARK-39651:
-----------------------------------
Assignee: jiaan.geng
> Prune filter condition if compare with rand is deterministic
> ------------------------------------------------------------
>
> Key: SPARK-39651
> URL: https://issues.apache.org/jira/browse/SPARK-39651
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: jiaan.geng
> Assignee: jiaan.geng
> Priority: Major
>
> The SQL
> {code:java}
> SELECT * FROM tab WHERE rand(1) < 2
> {code}
> evaluate rand(1) < 2 for rows one by one.
> In fact, we can prune the filter condition.
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