[jira] [Assigned] (IGNITE-4509) SQL: query with condition on affinity columns and without joins and subqueries can be replaced with GET

["Sergey Kalashnikov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/IGNITE-4509?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Kalashnikov reassigned IGNITE-4509:
------------------------------------------

    Assignee: Sergey Kalashnikov

> SQL: query with condition on affinity columns and without joins and subqueries can be replaced with GET
> -------------------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-4509
>                 URL: https://issues.apache.org/jira/browse/IGNITE-4509
>             Project: Ignite
>          Issue Type: Task
>          Components: SQL
>    Affects Versions: 1.8
>            Reporter: Vladimir Ozerov
>            Assignee: Sergey Kalashnikov
>              Labels: performance, sql
>             Fix For: 2.0
>
>
> Simple SQL queries usually demonstrate negative scalability when more nodes are added. 
> Consider the following query:
> {code}
> SELECT * FROM Person p
> WHERE p.id = ?
> {code}
> If {{Person.id}} is affinity field, then query can be replaced with plain {{IgniteCache.get}} or some specialized version of GET, which will return only desired fields. This optimization will guarantee smooth scale with any number of nodes.



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