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Posted to dev@calcite.apache.org by "Vladimir Sitnikov (Jira)" <ji...@apache.org> on 2020/01/01 20:23:00 UTC

[jira] [Created] (CALCITE-3661) Derive rowCount statistics for tables in ReflectiveSchema that are based on arrays/collections

Vladimir Sitnikov created CALCITE-3661:
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             Summary: Derive rowCount statistics for tables in ReflectiveSchema that are based on arrays/collections
                 Key: CALCITE-3661
                 URL: https://issues.apache.org/jira/browse/CALCITE-3661
             Project: Calcite
          Issue Type: Bug
          Components: core
    Affects Versions: 1.21.0
            Reporter: Vladimir Sitnikov


ReflectiveSchema is used quite common in Calcite tests, however, it misses statistics, so every reflective table is assumed to have 100 rows which makes it hard to understand if the optimizer is making reasonable decisions (e.g. join ordering).



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