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Posted to issues@spark.apache.org by "jiaan.geng (Jira)" <ji...@apache.org> on 2022/07/01 04:34:00 UTC
[jira] [Updated] (SPARK-39651) Prune filter condition compare rand function with foldable expression
[ https://issues.apache.org/jira/browse/SPARK-39651?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
jiaan.geng updated SPARK-39651:
-------------------------------
Description:
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.
was:
The SQL
SELECT * FROM tab WHERE rand(1) < 2
evaluate rand(1) < 2 for rows one by one.
In fact, we can prune the filter condition.
> Prune filter condition compare rand function with foldable expression
> ---------------------------------------------------------------------
>
> 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
> 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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