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From "Peter Vary (Jira)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-23103) Oracle statement batching
Date Fri, 17 Apr 2020 18:43:00 GMT

     [ https://issues.apache.org/jira/browse/HIVE-23103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Peter Vary updated HIVE-23103:
------------------------------
    Attachment: HIVE-23103.06.patch

> Oracle statement batching
> -------------------------
>
>                 Key: HIVE-23103
>                 URL: https://issues.apache.org/jira/browse/HIVE-23103
>             Project: Hive
>          Issue Type: Improvement
>          Components: Transactions
>            Reporter: Peter Vary
>            Assignee: Peter Vary
>            Priority: Major
>         Attachments: HIVE-23103.02.patch, HIVE-23103.03.patch, HIVE-23103.04.patch, HIVE-23103.05.patch,
HIVE-23103.06.patch, HIVE-23103.patch
>
>
> Examine how to really get better performance for oracle statement batches.
> [Oracle JDBC doc|https://docs.oracle.com/cd/E11882_01/java.112/e16548/oraperf.htm#JJDBC28752]
describes:
> {quote}The Oracle implementation of standard update batching does not implement true
batching for generic statements and callable statements. Even though Oracle JDBC supports
the use of standard batching for {{Statement}} and {{CallableStatement}} objects, you
are unlikely to see performance improvement.
> {quote}
> I would look for connection properties to set, so it is handled anyway, or if not, then
use:
> {code}
> begin
>   query1;
>   query2;
>   query3;
> end;
> {code}
> to we will have only a single roundtrip for the db.



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