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https://issues.apache.org/jira/browse/FLINK-14053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16928289#comment-16928289
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Jingsong Lee commented on FLINK-14053:
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[~jackylau] Thanks for reporting this bug. Yes, DenseRankAggFunction should be
same as RankAggFunction, you can do some abstract to RankLikeAggFunctionBase,
these two functions can share some logical. Feel free to submit a PR, I can
review it.
> blink planner dense_rank corner case bug
> ----------------------------------------
>
> Key: FLINK-14053
> URL: https://issues.apache.org/jira/browse/FLINK-14053
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 1.9.0
> Reporter: jackylau
> Priority: Major
> Fix For: 1.10.0
>
>
> sql :
> val rank =
> """
> |SELECT
> | gradeId,
> | classId,
> | stuId,
> | score,
> | dense_rank() OVER (PARTITION BY gradeId, classId ORDER BY score asc) as
> dense_rank_num
> |FROM student
> |
> """.stripMargin
> sample date:
> row("grade2", "class2", "0006", 90),
> row("grade1", "class2", "0007", 90),
> row("grade1", "class1", "0001", 95),
> row("grade1", "class1", "0002", 94),
> row("grade1", "class1", "0003", 97),
> row("grade1", "class1", "0004", 95),
> row("grade1", "class1", "0005", 0)
> the dense_rank ranks from 0, but it should be from 1
>
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