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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