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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-4509) SQL: query with condition on affinity columns and without joins and subqueries can be replaced with GET
Date Thu, 29 Dec 2016 09:41:58 GMT
Vladimir Ozerov created IGNITE-4509:
---------------------------------------

             Summary: 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
             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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