[jira] [Created] (IGNITE-5331) Investigate performance implications of SQL schema refactoring

["Vladimir Ozerov (JIRA)" <ji...@apache.org>]

Vladimir Ozerov created IGNITE-5331:
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             Summary: Investigate performance implications of SQL schema refactoring
                 Key: IGNITE-5331
                 URL: https://issues.apache.org/jira/browse/IGNITE-5331
             Project: Ignite
          Issue Type: Task
          Components: sql
            Reporter: Vladimir Ozerov
             Fix For: 2.1


SQL is now decoupled from concrete cache. It means tha:
1) Special cache-agnostic implementation {{CacheQueryObjectValueContext}} is passed to binary objects, with {{copyOnGet}} always returning true.
2) {{GridH2ValueCacheObject.getObject(boolean)}} is now called with {{true}} argument more oftner (see usages and Git history).

All in all it means that more object copying could occur than before. We need to understand whether performance is affected. 

One important thing to consider is immutability of binary object. That is, once created, {{BinaryObject}} never changes. It means that is {{BinaryMarshaller}} is enabled, we can always avoid copying safely.



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