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https://issues.apache.org/jira/browse/IMPALA-11591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy reassigned IMPALA-11591:
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Assignee: Zoltán Borók-Nagy
> Avoid calling planFiles() on Iceberg tables when there are no predicates
> ------------------------------------------------------------------------
>
> Key: IMPALA-11591
> URL: https://issues.apache.org/jira/browse/IMPALA-11591
> Project: IMPALA
> Issue Type: Improvement
> Reporter: Zoltán Borók-Nagy
> Assignee: Zoltán Borók-Nagy
> Priority: Major
> Labels: impala-iceberg
>
> Currently we always invoke Iceberg's planFiles() API for creating Iceberg
> scans.
> When there are no predicates (and no time travel) on the table we could avoid
> that because we already cache everything we need (schema, partition
> information, file descriptors).
> We can also consider only pushing down predicates if at least one of the
> predicates refer to a partition column. Otherwise it's possible that the
> overhead of reading, decoding, evaluating all the manifest files is too large.
> I think the change should be fairly simple, we just need to take care:
> * store delete files separately, so we can still do the V2 scans from cache
> * During time-travel we also cache old file descriptors, so we need to
> separate them from the actual snapshot's file descriptors.
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