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https://issues.apache.org/jira/browse/FLINK-8739?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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sunjincheng closed FLINK-8739.
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Resolution: Fixed
Fix Version/s: 1.8.0
Fixed in master: 12260a27ddb0ec8356b4981f033c6c9954fe2ab4
> Optimize runtime support for distinct filter
> --------------------------------------------
>
> Key: FLINK-8739
> URL: https://issues.apache.org/jira/browse/FLINK-8739
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Rong Rong
> Assignee: Dian Fu
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.8.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Possible optimizaitons:
> 1. Decouple distinct map and actual accumulator so that they can separately
> be created in codegen.
> 2. Reuse same distinct accumulator for filtering, e.g. `SELECT
> COUNT(DISTINCT(a)), SUM(DISTINCT(a))` should reuse the same distinct map.
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