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Posted to issues@impala.apache.org by "Zoltán Borók-Nagy (Jira)" <ji...@apache.org> on 2022/09/13 13:41:00 UTC

[jira] [Created] (IMPALA-11582) Implement table sampling for Iceberg tables

Zoltán Borók-Nagy created IMPALA-11582:
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             Summary: Implement table sampling for Iceberg tables
                 Key: IMPALA-11582
                 URL: https://issues.apache.org/jira/browse/IMPALA-11582
             Project: IMPALA
          Issue Type: Bug
          Components: Frontend
            Reporter: Zoltán Borók-Nagy


Currently Iceberg tables cannot be sampled.

We should allow table sampling for Iceberg tables in SELECT and COMPUTE STATS statements.

Predicates in the WHERE clause should affect the results of table sampling similarly to how legacy tables work (sampling is applied after static partition pruning).

Make the operation repeatable via the REPEATABLE clause.

See details at https://impala.apache.org/docs/build/html/topics/impala_tablesample.html




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