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Posted to issues@ignite.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2017/02/27 08:39:45 UTC
[jira] [Commented] (IGNITE-3487) _key and _val fields should be
excluded from 'select * from' queries
[ https://issues.apache.org/jira/browse/IGNITE-3487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15885357#comment-15885357 ]
ASF GitHub Bot commented on IGNITE-3487:
----------------------------------------
GitHub user skalashnikov opened a pull request:
https://github.com/apache/ignite/pull/1573
IGNITE-3487 Removed _key and _val from table column list
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:
https://github.com/apache/ignite/pull/1573.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1573
----
commit f5847b8129c77a5200a48d6fa64f25b2b6f5b945
Author: skalashnikov <sk...@gridgain.com>
Date: 2017-02-27T08:33:02Z
IGNITE-3487 Removed _key and _val from table column list
----
> _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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