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Posted to issues@ignite.apache.org by "Andrey Mashenkov (Jira)" <ji...@apache.org> on 2019/10/03 14:43:00 UTC
[jira] [Commented] (IGNITE-12189) Implement correct limit for
TextQuery
[ https://issues.apache.org/jira/browse/IGNITE-12189?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16943640#comment-16943640 ]
Andrey Mashenkov commented on IGNITE-12189:
-------------------------------------------
[~Yuriy_Shuliha], good try. I've left few comments to the PR.
Change in PlatformCache can broke text queries in .NET. Let's make a stub and fix it later within a new ticket.
Other my comments relates to code styles.
> Implement correct limit for TextQuery
> -------------------------------------
>
> Key: IGNITE-12189
> URL: https://issues.apache.org/jira/browse/IGNITE-12189
> Project: Ignite
> Issue Type: Improvement
> Components: general
> Reporter: Yuriy Shuliha
> Assignee: Yuriy Shuliha
> Priority: Major
> Fix For: 2.8
>
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> PROBLEM
> For now each server-node returns all response records to the client-node and it may contain ~thousands, ~hundred thousands records.
> Event if we need only first 10-100. Again, all the results are added to queue in _*GridCacheQueryFutureAdapter*_ in arbitrary order by pages.
> There are no any means to deliver deterministic result.
> SOLUTION
> Implement _*limit*_ as parameter for _*TextQuery*_ and _*GridCacheQueryRequest*_
> It should be passed as limit parameter in Lucene's _*IndexSearcher.search()*_ in _*GridLuceneIndex*_.
> For distributed queries _*limit*_ will also trim response queue when merging results.
> Type: long
> Special value: : 0 -> No limit (Integer.MAX_VALUE);
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