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https://issues.apache.org/jira/browse/IMPALA-11238?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zoltán Borók-Nagy updated IMPALA-11238:
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Summary: Avoid the need for COMPUTE SATS for Iceberg tables (was: Avoid
the need for COMPUTE STAST for Iceberg tables)
> Avoid the need for COMPUTE SATS for Iceberg tables
> --------------------------------------------------
>
> Key: IMPALA-11238
> URL: https://issues.apache.org/jira/browse/IMPALA-11238
> Project: IMPALA
> Issue Type: Improvement
> Components: Frontend
> Reporter: Zoltán Borók-Nagy
> Priority: Major
> Labels: impala-iceberg
>
> We still need to issue COMPUTE STATS for Iceberg tables to do proper planning.
> The main reason for it that Iceberg metadata lacks NDV information about
> columns at the table level.
> There are plans in Iceberg to store HyperLogLog arrays for data files, so
> once we have that we could use that information.
> Until that maybe we could use some heuristics from Iceberg metadata when
> there is no precise NDV available.
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