[
https://issues.apache.org/jira/browse/IMPALA-12786?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Michael Smith updated IMPALA-12786:
-----------------------------------
Component/s: Backend
(was: be)
> Optimize count(*) for JSON scans
> --------------------------------
>
> Key: IMPALA-12786
> URL: https://issues.apache.org/jira/browse/IMPALA-12786
> Project: IMPALA
> Issue Type: Sub-task
> Components: Backend
> Affects Versions: Impala 4.3.0
> Reporter: Zihao Ye
> Assignee: Zihao Ye
> Priority: Major
>
> The current JSON scanner does not optimize the scanning of count(*) (zero
> slots). Even if we do not need the actual data of any fields, the JSON parser
> will still parse and copy strings during the scanning process. Skipping these
> parsing and copying operations during the scanning of zero slots can
> significantly improve performance.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
