[
https://issues.apache.org/jira/browse/FLINK-21573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Flink Jira Bot updated FLINK-21573:
-----------------------------------
Labels: auto-deprioritized-major (was: stale-major)
Priority: Minor (was: Major)
This issue was labeled "stale-major" 7 days ago and has not received any
updates so it is being deprioritized. If this ticket is actually Major, please
raise the priority and ask a committer to assign you the issue or revive the
public discussion.
> Support expression reuse in codegen
> -----------------------------------
>
> Key: FLINK-21573
> URL: https://issues.apache.org/jira/browse/FLINK-21573
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Runtime
> Reporter: Benchao Li
> Priority: Minor
> Labels: auto-deprioritized-major
>
> Currently there is no expression reuse in codegen, and this may result in
> more CPU overhead in some cases. E.g.
> {code:java}
> SELECT my_map['key1'] as key1, my_map['key2'] as key2, my_map['key3'] as key3
> FROM (
> SELECT dump_json_to_map(col1) as my_map
> FROM T
> )
> {code}
> `dump_json_to_map` will be called 3 times.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
