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https://issues.apache.org/jira/browse/FLINK-11949?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kurt Young closed FLINK-11949.
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Resolution: Implemented
Fix Version/s: 1.9.0
fixed in 4bd2db2abf73f233632a0f256ac00c30dba0c6ec
> Introduce DeclarativeAggregateFunction and AggsHandlerCodeGenerator to blink
> planner
> ------------------------------------------------------------------------------------
>
> Key: FLINK-11949
> URL: https://issues.apache.org/jira/browse/FLINK-11949
> Project: Flink
> Issue Type: New Feature
> Components: SQL / Planner
> Reporter: Jingsong Lee
> Assignee: Jingsong Lee
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.9.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> Introduce DeclarativeAggregateFunction: Use java Expressions to write a
> AggregateFunction, just like Table Api. Then the Table generates the
> corresponding CodeGenerator code according to the user's Expression logic.
> This avoids the Java object overhead in AggregateFunction before.
> Introduce AggsHandlerCodeGenerator: According to multiple AggregateFunctions,
> generate a complete aggregation processing Class.
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