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https://issues.apache.org/jira/browse/FLINK-6219?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Fabian Hueske updated FLINK-6219:
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Summary: Add a sorted state primitive (was: Add a state backend which
supports sorting)
> Add a sorted state primitive
> ----------------------------
>
> Key: FLINK-6219
> URL: https://issues.apache.org/jira/browse/FLINK-6219
> Project: Flink
> Issue Type: New Feature
> Components: State Backends, Checkpointing, Table API & SQL
> Reporter: sunjincheng
>
> When we implement the OVER window of
> [FLIP11|https://cwiki.apache.org/confluence/display/FLINK/FLIP-11%3A+Table+API+Stream+Aggregations]
> We notice that we need a state backend which supports sorting, allows for
> efficient insertion, traversal in order, and removal from the head.
> For example: In event-time OVER window, we need to sort by time，If the datas
> as follow:
> {code}
> (1L, 1, Hello)
> (2L, 2, Hello)
> (5L, 5, Hello)
> (4L, 4, Hello)
> {code}
> We randomly insert the datas, just like:
> {code}
> put((2L, 2, Hello)),put((1L, 1, Hello)),put((5L, 5, Hello)),put((4L, 4,
> Hello)),
> {code}
> We deal with elements in time order:
> {code}
> process((1L, 1, Hello)),process((2L, 2, Hello)),process((4L, 4,
> Hello)),process((5L, 5, Hello))
> {code}
> Welcome anyone to give feedback，And what do you think? [~xiaogang.shi]
> [~aljoscha] [~fhueske]
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