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From "Yury Gerzhedovich (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-11499) SQL: DML should not use batches by default
Date Thu, 18 Apr 2019 11:51:00 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-11499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16820996#comment-16820996
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Yury Gerzhedovich commented on IGNITE-11499:
--------------------------------------------

[~tledkov-gridgain], just one minor comment [ConnectionPropertiesImpl.java|https://github.com/apache/ignite/pull/6381/files#diff-815dbcdf24e2a2b4fc9c2236ca20a4c9] -
need to amend javadoc for updateBatchSize field.

> SQL: DML should not use batches by default
> ------------------------------------------
>
>                 Key: IGNITE-11499
>                 URL: https://issues.apache.org/jira/browse/IGNITE-11499
>             Project: Ignite
>          Issue Type: Task
>          Components: sql
>            Reporter: Vladimir Ozerov
>            Assignee: Taras Ledkov
>            Priority: Major
>             Fix For: 2.8
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> Currently DML apply updates in batches equal to {{SqlFieldsQuery.pageSize}}. This is
prone to deadlocks. Instead, we should apply updates one-by-one by default. Proposal:
> # Introduce {{SqlFieldsQuery.updateBatchSize}} property, set it to {{1}} by default
> # Print a warning about deadlock to log if it is greater than 1
> # Add it to JDBC and ODBC drivers
> # Add it to other languages



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