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Posted to issues@impala.apache.org by "Tim Armstrong (Jira)" <ji...@apache.org> on 2021/01/25 18:55:00 UTC

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

Tim Armstrong created IMPALA-10453:
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             Summary: 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


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.



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