[jira] [Created] (CALCITE-5089) Allow GROUP BY ALL or DISTINCT set quantifier on GROUPING SETS

["yanjing.wang (Jira)" <ji...@apache.org>]

yanjing.wang created CALCITE-5089:
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             Summary: Allow GROUP BY ALL or DISTINCT set quantifier on GROUPING SETS
                 Key: CALCITE-5089
                 URL: https://issues.apache.org/jira/browse/CALCITE-5089
             Project: Calcite
          Issue Type: Improvement
          Components: core
    Affects Versions: 1.30.0
         Environment: jdk8
            Reporter: yanjing.wang
            Assignee: yanjing.wang
             Fix For: 1.31.0


GROUP BY DISTINCT will be used to remove duplicate GROUPING SETS, for example:
{code:java}
SELECT product_id, product_class_id, count(*) from product GROUP BY DISTINCT CUBE (product_id, product_class_id), ROLLUP (product_id, product_class_id){code}
it's equivalent to 
{code:java}
SELECT product_id, product_class_id, count(*) from product GROUP BY GROUPING SETS ((product_id, product_class_id), (product_id), (product_class_id), ()) {code}
GROUP BY ALL will remain the duplicate GROUPING SETS, it's equivalent to GROUP BY, so most databases use ALL as the default set quantifier.

As far as I know the PostgreSQL and Trino support this syntax.



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