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https://issues.apache.org/jira/browse/FLINK-12018?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-12018:
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Labels: pull-request-available (was: )
> Add support for generating optimized logical plan for Sort and Rank
> -------------------------------------------------------------------
>
> Key: FLINK-12018
> URL: https://issues.apache.org/jira/browse/FLINK-12018
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Planner
> Reporter: godfrey he
> Assignee: godfrey he
> Priority: Major
> Labels: pull-request-available
>
> Add support for generating optimized logical plan for Sort and Rank.
> There is a summary of Sort and Rank converters:
> for batch,
> 1. Sort without sort fields, fetch and offset will be converted to
> BatchExecLimit
> 2. Sort with sort fields, null-fetch and null-offset will be converted to
> BatchExecSort
> 3. otherwise, Sort will be converted to BatchExecSortLimit
> 4. RANK function on over with filter will be converted to BatchExecRank
> for stream,
> 1. Sort with time-ascending-order and non-limit will be converted to
> StreamExecTemporalSort
> 2. Sort with limit will be converted to StreamExecRank
> 3. Sort which is sorted on proc-time attribute and fetches only one record
> start from 0 will be converted to StreamExecFirstLastRow
> 4. otherwise, Sort will be converted to StreamExecSort
> 5. RANK function on over with filter will be converted to StreamExecRank
> 6. Rank with ROW_NUMBER function which is sorted on proc-time attribute and
> fetches only one record start from 0 will be converted to
> StreamExecFirstLastRow
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