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https://issues.apache.org/jira/browse/FLINK-19079?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu closed FLINK-19079.
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Fix Version/s: 1.12.0
Resolution: Fixed
Fixed in master (1.12.0): ad18d13080f409223e955a1bb7c80239b74989a2
> Support row time deduplicate operator
> -------------------------------------
>
> Key: FLINK-19079
> URL: https://issues.apache.org/jira/browse/FLINK-19079
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Runtime
> Reporter: Leonard Xu
> Assignee: Leonard Xu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.12.0
>
>
> To convert a insert-only table to versioned table, the recommended way is use
> deduplicate query as following, the converted *versioned_view* owns primary
> key and event time and thus can be a versioned table.
> {code:java}
> CREATE VIEW versioned_rates AS
> SELECT currency, rate, currency_time
> FROM (
> SELECT *,
> ROW_NUMBER() OVER (PARTITION BY currency -- inferred primary key
> ORDER BY currency_time -- the event time
> DESC) AS rowNum
> FROM rates)
> WHERE rowNum = 1;
> {code}
> But currently deduplicate operator only support on process time, this issue
> aims to support deduplicate on Event time.
>
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