Jark Wu created FLINK-12173:
-------------------------------
Summary: 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
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
(v7.6.3#76005)
