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Posted to issues@spark.apache.org by "jiaan.geng (Jira)" <ji...@apache.org> on 2022/11/17 12:05:00 UTC
[jira] [Updated] (SPARK-41171) Push down filter through window when partitionSpec is empty
[ https://issues.apache.org/jira/browse/SPARK-41171?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
jiaan.geng updated SPARK-41171:
-------------------------------
Description:
Sometimes, filter compares the rank-like window functions with number.
{code:java}
SELECT *, ROW_NUMBER() OVER(ORDER BY a) AS rn FROM Tab1 WHERE rn <= 5
{code}
We can create a Limit(5) and push down it as the child of Window.
{code:java}
SELECT *, ROW_NUMBER() OVER(ORDER BY a) AS rn FROM (SELECT * FROM Tab1 ORDER BY a LIMIT 5) t
{code}
> Push down filter through window when partitionSpec is empty
> -----------------------------------------------------------
>
> Key: SPARK-41171
> URL: https://issues.apache.org/jira/browse/SPARK-41171
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.4.0
> Reporter: jiaan.geng
> Priority: Major
>
> Sometimes, filter compares the rank-like window functions with number.
> {code:java}
> SELECT *, ROW_NUMBER() OVER(ORDER BY a) AS rn FROM Tab1 WHERE rn <= 5
> {code}
> We can create a Limit(5) and push down it as the child of Window.
> {code:java}
> SELECT *, ROW_NUMBER() OVER(ORDER BY a) AS rn FROM (SELECT * FROM Tab1 ORDER BY a LIMIT 5) t
> {code}
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