[jira] [Created] (FLINK-6839) Improve SQL OVER alias When only one OVER window agg in selection.

["sunjincheng (JIRA)" <ji...@apache.org>]

sunjincheng created FLINK-6839:
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             Summary: Improve SQL OVER alias When only one OVER window agg in selection.
                 Key: FLINK-6839
                 URL: https://issues.apache.org/jira/browse/FLINK-6839
             Project: Flink
          Issue Type: Improvement
            Reporter: sunjincheng


For OVER SQL:
{code}
SELECT a COUNT(c) OVER (ORDER BY proctime  RANGE BETWEEN INTERVAL '10' SECOND PRECEDING AND CURRENT ROW) as cnt1 FROM MyTable
{code}

We expect plan {{DataStreamCalc(select=[a, w0$o0 AS cnt1]) But we get {{DataStreamCalc(select=[a, w0$o0 AS $1]) }}. this improve only for plan check.  the functional is work well in nested queries，e.g.: 
{code}
SELECT cnt1 from (SELECT a COUNT(c) OVER (ORDER BY proctime  RANGE BETWEEN INTERVAL '10' SECOND PRECEDING AND CURRENT ROW) as cnt1 FROM MyTable) 
{code}
The SQL above is work well. which mentioned in [FLINK-6760|https://issues.apache.org/jira/browse/FLINK-6760].



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