[jira] [Commented] (IMPALA-10453) Support file/partition pruning via runtime filters on Iceberg

["Riza Suminto (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-10453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17525694#comment-17525694 ] 

Riza Suminto commented on IMPALA-10453:
---------------------------------------

Since IMPALA-11147 gets in, we're not creating column readers for identity-partitioned columns anymore and lose some opportunity do min/max and dictionary filtering in row group level.
We will need this IMPALA-10453 to compensate for that.

> Support file/partition pruning via runtime filters on Iceberg
> -------------------------------------------------------------
>
>                 Key: IMPALA-10453
>                 URL: https://issues.apache.org/jira/browse/IMPALA-10453
>             Project: IMPALA
>          Issue Type: Improvement
>          Components: Backend
>            Reporter: Tim Armstrong
>            Assignee: Tamas Mate
>            Priority: Major
>              Labels: iceberg, impala-iceberg, performance
>
> This is a placeholder to figure out what we'd need to do to support dynamic file-level pruning in Iceberg using runtime filters, i.e. have parity for partition pruning.
> * If there is a single partition value per file, then applying bloom filters to the row group stats would be effective at pruning files.
> * If there are partition transforms, e.g. hash-based, then I think we probably need to track the partition that the file is associated with and then have some custom logic in the parquet scanner to do partition pruning.



--
This message was sent by Atlassian Jira
(v8.20.7#820007)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-all-unsubscribe@impala.apache.org
For additional commands, e-mail: issues-all-help@impala.apache.org