[
https://issues.apache.org/jira/browse/FLINK-12017?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
aloyszhang updated FLINK-12017:
-------------------------------
Description:
Support translation from Rank/FirstLastRow to StreamTransformation, So
following sql can be run:
1.
SELECT a, b, c
FROM (
SELECT *,
ROW_NUMBER() OVER (PARTITION BY b ORDER BY proc DESC) as rowNum
FROM T
)
WHERE rowNum = 1
2.
SELECT *
FROM (
SELECT category, shopId, num,
ROW_NUMBER() OVER (PARTITION BY category ORDER BY num DESC) as rank_num
FROM T)
WHERE rank_num <= 2
was:
Support translation from Rank/FirstLastRow to StreamTransformation, So
following sql can be run:
1.
SELECT a, b, c
FROM (
SELECT *,
ROW_NUMBER() OVER (PARTITION BY b ORDER BY proc DESC) as rowNum
FROM T
)
WHERE rowNum = 1
2.
SELECT *
FROM (
SELECT category, shopId, num,
ROW_NUMBER() OVER (PARTITION BY category ORDER BY num DESC) as rank_num
FROM T)
WHERE rank_num <= 2
> Support translation from Rank/FirstLastRow to StreamTransformation
> ------------------------------------------------------------------
>
> Key: FLINK-12017
> URL: https://issues.apache.org/jira/browse/FLINK-12017
> Project: Flink
> Issue Type: Task
> Components: Table SQL / Planner
> Reporter: Jing Zhang
> Priority: Major
>
> Support translation from Rank/FirstLastRow to StreamTransformation, So
> following sql can be run:
> 1.
> SELECT a, b, c
> FROM (
> SELECT *,
> ROW_NUMBER() OVER (PARTITION BY b ORDER BY proc DESC) as rowNum
> FROM T
> )
> WHERE rowNum = 1
> 2.
> SELECT *
> FROM (
> SELECT category, shopId, num,
> ROW_NUMBER() OVER (PARTITION BY category ORDER BY num DESC) as rank_num
> FROM T)
> WHERE rank_num <= 2
>
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