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From "Vladimir Ozerov (JIRA)" <j...@apache.org>
Subject [jira] [Created] (IGNITE-6022) SQL: add native batch execution support for DML statements
Date Thu, 10 Aug 2017 08:35:00 GMT
Vladimir Ozerov created IGNITE-6022:
---------------------------------------

             Summary: SQL: add native batch execution support for DML statements
                 Key: IGNITE-6022
                 URL: https://issues.apache.org/jira/browse/IGNITE-6022
             Project: Ignite
          Issue Type: Bug
          Components: sql
    Affects Versions: 2.1
            Reporter: Vladimir Ozerov
             Fix For: 2.2


We have batch execution support for JDBC and ODBC drivers. This decreases number of network
hops. However, we do not have any batch execution support on the server side. It means that
for batch of N similar statements, every statement will go through the whole execution chain
- parsing, splitting, communication with servers. And while parsing and splitting might be
avoided with help of statement cache, the most heavy part - network communication - is still
there.

We need to investigate how to optimize the flow for batch updates. Possible improvements:
1) Execute statements with certain degree of parallelism;
2) Send several query execution requests to the server at once;
3) Ensure that caches are used properly for batching - we should not parse the same request
multiple times.



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