[
https://issues.apache.org/jira/browse/IGNITE-9933?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Vladimir Ozerov reassigned IGNITE-9933:
---------------------------------------
Assignee: (was: Taras Ledkov)
> SQL: lazy mode isn't used on reduce step
> ----------------------------------------
>
> Key: IGNITE-9933
> URL: https://issues.apache.org/jira/browse/IGNITE-9933
> Project: Ignite
> Issue Type: Improvement
> Components: sql
> Affects Versions: 2.6
> Reporter: Taras Ledkov
> Priority: Major
>
> Lazy execution is introduced as default by IGNITE-9171.
> But queries are executed lazy only in map phase now.
> So, we have introduce lazy query execution on reduce step when merge table is
> user to prevent waits for fetch all results on reduce step and excessive
> allocate memory.
> It will be applicable for queries sorted by index.
> Attention: when reduce query is executed in lazy mode the release remote
> resource and query cancellation must be changed.
> See:
> - {{GridReduceQueryExecutor#query}}
> - {{GridReduceQueryExecutor#releaseRemoteResources}}
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
