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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-3487) _key and _val fields should be excluded from 'select * from' queries
Date Mon, 24 Apr 2017 16:14:04 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15981429#comment-15981429

ASF GitHub Bot commented on IGNITE-3487:

GitHub user skalashnikov opened a pull request:


    IGNITE-3487: hidden _key and _val columns


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/gridgain/apache-ignite ignite-3487

Alternatively you can review and apply these changes as the patch at:


To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #1865


> _key and _val fields should be excluded from 'select * from' queries
> --------------------------------------------------------------------
>                 Key: IGNITE-3487
>                 URL: https://issues.apache.org/jira/browse/IGNITE-3487
>             Project: Ignite
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.6
>            Reporter: Valentin Kulichenko
>            Assignee: Sergey Kalashnikov
>              Labels: important
>             Fix For: 2.0
> We have a pretty serious usability issue - predefined {{_key}} and {{_val}} fields are
returned when query like {{select * from}} is executed. First of all, this is counterintuitive
because user never defines or configures these fields. Second of all, they actually duplicate
all other fields. And finally, they cause serialization exceptions because classes for key
and value are not always available.
> We should exclude these fields from {{select * from}} queries, but this is a compatibility
breaking change. It should be done in 2.0.

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