ignite-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-5571) Make sure that cache-less execution works as good as cache-based
Date Wed, 21 Jun 2017 14:15:02 GMT
Vladimir Ozerov created IGNITE-5571:
---------------------------------------

             Summary: Make sure that cache-less execution works as good as cache-based
                 Key: IGNITE-5571
                 URL: https://issues.apache.org/jira/browse/IGNITE-5571
             Project: Ignite
          Issue Type: Task
          Components: sql
            Reporter: Vladimir Ozerov
            Assignee: Alexander Paschenko
            Priority: Critical
             Fix For: 2.1


Compare the following two methods:
1) {{GridQueryProcessor.querySqlFields}} - old good entry point for query execution;
2) {{GridQueryProcessor.querySqlFieldsNoCache}} - new method for "cache-less" execution.

Note how cache context is used in the first method:
1) First, it helps determine whether query can be converted to "local"
2) Second, it gets query parallelism of current cache, and if it differs from {{1}}, then
it turns on {{distributedJoins}}.

Neither of this happens in the second implementation. Moreover, I had to throw an exception
for local queries, as I didn't know how to handle them properly.

We need to investigate and fix these two deficiencies somehow. Probably some inputs from [~sergi.vladykin]
would be required, to understand what is going on.

Our ultimate goal is to make "cache-less" execution as good as the old one.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Mime
View raw message