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From "Roman Kondakov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-7039) SQL: local query should pin affected partitions
Date Fri, 15 Dec 2017 08:02:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-7039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16292167#comment-16292167
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Roman Kondakov commented on IGNITE-7039:
----------------------------------------

[~vozerov], please review.
1) In {{IgniteH2Indexing.queryLocalSqlFields}} I implemented an eager partitions reservation
on {{IgniteCache.query()}} call. I also implemented a test {{IgniteCacheLocalQueryReservationsTest}}
for checking a partitions reservation status on each stage:
*  Before {{IgniteCache.query()}}.
*  After {{IgniteCache.query()}}.
*  After {{QueryCursor.iterator()}}.
*  After {{Iterator.next()}}.
*  After {{QueryCursor.close()}}.

2. I implemented another method for a gathering all caches ids used in a query based on {{GridSqlQueryParser}}.
I also added a cache map for the parsed queries.

> SQL: local query should pin affected partitions
> -----------------------------------------------
>
>                 Key: IGNITE-7039
>                 URL: https://issues.apache.org/jira/browse/IGNITE-7039
>             Project: Ignite
>          Issue Type: Bug
>          Components: sql
>            Reporter: Vladimir Ozerov
>            Assignee: Roman Kondakov
>             Fix For: 2.4
>
>
> When distributed query is executed, we pin cache partitions for particular topology version
on map nodes [1]. However, it seems that we do no do that for local queries. This is a bug
because partition with required data could be evicted from local node at any time, leading
to incorrect results.
> [1] https://github.com/apache/ignite/blob/ignite-2.3/modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/twostep/GridMapQueryExecutor.java#L288



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