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https://issues.apache.org/jira/browse/FLINK-12208?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu updated FLINK-12208:
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Summary: Introduce Sort & TemporalSort & SortLimit & Limit operators for
blink streaming runtime (was: Support translation from StreamExecSort /
TemporalSort / SortLimit/ Limit to StreamTransformation.)
> Introduce Sort & TemporalSort & SortLimit & Limit operators for blink
> streaming runtime
> ---------------------------------------------------------------------------------------
>
> Key: FLINK-12208
> URL: https://issues.apache.org/jira/browse/FLINK-12208
> Project: Flink
> Issue Type: Task
> Components: Table SQL / Runtime
> Reporter: Jing Zhang
> Priority: Major
>
> Support translation from StreamExecSort / TemporalSort / SortLimit/ Limit to
> StreamTransformation.
> 1. StreamExecSort handles query which requires sort on non-time fields, which
> caches all inputs elements, sorts all cached elements when the bounded-stream
> is finished, outputs sorted elements one by one then.
> *Notes:* it's only used for testing with bounded source now. If a query is
> converted to this node in product environment, an exception will be thrown.
> 2. StreamExecTemporalSort handles query which requires sort on EventTime/
> ProcTime fields
> 3. StreamExecLimit could handles query which only takes `limit` elements
> from offset.
> *Notes:* StreamExecLimit could only support take limited elements currently,
> that is, `fetch` must be present in query.
> 4. StreamExecSortLimit handles query which not only requires sort, but also
> only takes `limit` elements from offset.
> *Notes:* StreamExecSortLimit could only support take limited elements
> currently, that is, `fetch` must be present in query.
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