[
https://issues.apache.org/jira/browse/FLINK-12173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Dawid Wysakowicz reassigned FLINK-12173:
----------------------------------------
Assignee: Yiyu Tian
> Optimize "SELECT DISTINCT" into Deduplicate with keep first row
> ---------------------------------------------------------------
>
> Key: FLINK-12173
> URL: https://issues.apache.org/jira/browse/FLINK-12173
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Planner
> Reporter: Jark Wu
> Assignee: Yiyu Tian
> Priority: Major
> Labels: auto-deprioritized-major, auto-deprioritized-minor
>
> The following distinct query can be optimized into deduplicate on keys "a, b,
> c, d" and keep the first row.
> {code:sql}
> SELECT DISTINCT a, b, c, d;
> {code}
> We can optimize this query into Deduplicate to get a better performance than
> GroupAggregate.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
