[jira] [Created] (FLINK-21225) OverConvertRule does not consider distinct

["Timo Walther (Jira)" <ji...@apache.org>]

Timo Walther created FLINK-21225:
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             Summary: OverConvertRule does not consider distinct
                 Key: FLINK-21225
                 URL: https://issues.apache.org/jira/browse/FLINK-21225
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
            Reporter: Timo Walther


We don't support OVER window distinct aggregates in Table API. Even though this is explicitly documented:

https://ci.apache.org/projects/flink/flink-docs-release-1.12/dev/table/tableApi.html#aggregations

{code}
// Distinct aggregation on over window
Table result = orders
    .window(Over
        .partitionBy($("a"))
        .orderBy($("rowtime"))
        .preceding(UNBOUNDED_RANGE)
        .as("w"))
    .select(
        $("a"), $("b").avg().distinct().over($("w")),
        $("b").max().over($("w")),
        $("b").min().over($("w"))
    );
{code}

The distinct flag is set to false in {{OverConvertRule}}.

See also
http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Unknown-call-expression-avg-amount-when-use-distinct-in-Flink-Thanks-td40905.html



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