[jira] [Commented] (SPARK-32331) Keep advanced statistics when pruning partitions

["Apache Spark (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-32331?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17159214#comment-17159214 ] 

Apache Spark commented on SPARK-32331:
--------------------------------------

User 'peter-toth' has created a pull request for this issue:
https://github.com/apache/spark/pull/29132

> Keep advanced statistics when pruning partitions
> ------------------------------------------------
>
>                 Key: SPARK-32331
>                 URL: https://issues.apache.org/jira/browse/SPARK-32331
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.1.0
>            Reporter: Peter Toth
>            Priority: Major
>
> The rule {{PruneFileSourcePartitions}} deletes the advances statistics (cardinality, column stats) of the underlying {{LogicalRelation}} and keeps only {{sizeInBytes}} as that is the only value we can be sure that is accurate.
> I think we should keep all statistics as they are a good upper limit estimates and by keeping them other rules that depend on the presence of these statistics (like {{CostBasedJoinReorder}}) can still ran.



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