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Posted to issues@spark.apache.org by "Felipe (Jira)" <ji...@apache.org> on 2022/08/04 17:07:00 UTC
[jira] [Updated] (SPARK-39971) ANALYZE TABLE makes some queries run forever
[ https://issues.apache.org/jira/browse/SPARK-39971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Felipe updated SPARK-39971:
---------------------------
Description:
I'm using TPCDS to run benchmarks, and after running ANALYZE TABLE (without the FOR ALL COLUMNS) some queries became really slow. For example query24 - [https://raw.githubusercontent.com/Agirish/tpcds/master/query24.sql|https://raw.githubusercontent.com/Agirish/tpcds/master/query24.sql,],takes between 10~15min before running the ANALYZE TABLE.
After running ANALYZE TABLE I waited 24h before cancelling the execution.
If I disable spark.sql.cbo.joinReorder.enabled or
spark.sql.cbo.enabled it becomes fast again.
It seems something in join reordering is not working well when we have table stats, but not column stats.
was:
I'm using TPCDS to run benchmarks, and after running ANALYZE TABLE (without the FOR ALL COLUMNS) some queries became really slow. For example query24 - [https://raw.githubusercontent.com/Agirish/tpcds/master/query24.sql,] takes between 10~15min before running the ANALYZE TABLE.
After running ANALYZE TABLE I waited 24h before cancelling the execution.
If I disable spark.sql.cbo.joinReorder.enabled or
spark.sql.cbo.enabled it becomes fast again.
It seems something in join reordering is not working well when we have table stats, but not column stats.
> ANALYZE TABLE makes some queries run forever
> --------------------------------------------
>
> Key: SPARK-39971
> URL: https://issues.apache.org/jira/browse/SPARK-39971
> Project: Spark
> Issue Type: Bug
> Components: Optimizer
> Affects Versions: 3.2.2
> Reporter: Felipe
> Priority: Major
>
> I'm using TPCDS to run benchmarks, and after running ANALYZE TABLE (without the FOR ALL COLUMNS) some queries became really slow. For example query24 - [https://raw.githubusercontent.com/Agirish/tpcds/master/query24.sql|https://raw.githubusercontent.com/Agirish/tpcds/master/query24.sql,],takes between 10~15min before running the ANALYZE TABLE.
> After running ANALYZE TABLE I waited 24h before cancelling the execution.
> If I disable spark.sql.cbo.joinReorder.enabled or
> spark.sql.cbo.enabled it becomes fast again.
> It seems something in join reordering is not working well when we have table stats, but not column stats.
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