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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IGNITE-4524) Indexes usage in SQL functions like min/max
Date Thu, 06 Apr 2017 10:58:41 GMT

    [ https://issues.apache.org/jira/browse/IGNITE-4524?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15958737#comment-15958737
] 

ASF GitHub Bot commented on IGNITE-4524:
----------------------------------------

GitHub user skalashnikov opened a pull request:

    https://github.com/apache/ignite/pull/1749

    IGNITE-4524: Index direct lookup for SQL MIN() and MAX()

    

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

    $ git pull https://github.com/gridgain/apache-ignite ignite-4524

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

    https://github.com/apache/ignite/pull/1749.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 #1749
    
----
commit 9fd888e30397612d9b732264da8b3e265ff27175
Author: skalashnikov <skalashnikov@gridgain.com>
Date:   2017-04-06T10:50:15Z

    IGNITE-4524: Index direct lookup for SQL MIN() and MAX()

----


> Indexes usage in SQL functions like min/max
> -------------------------------------------
>
>                 Key: IGNITE-4524
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4524
>             Project: Ignite
>          Issue Type: Bug
>          Components: SQL
>            Reporter: Denis Magda
>            Assignee: Sergey Kalashnikov
>              Labels: important
>             Fix For: 2.0
>
>
> If to execute queries like this
> {code}
> select min(id) from MyValue
> select max(id) from MyValue
> {code}
> assuming that 'id' is an indexed field then the engine will not gain from this. 
> The SQL engine needs to be improved so that the indexes are used for queries like the
ones above.
> More details can be found in this discussion:
> http://apache-ignite-developers.2346864.n4.nabble.com/min-max-SQL-and-indexes-td13492.html



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