[hibernate-issues] [Hibernate-JIRA] Updated: (HHH-3271) Prepare Statement Caching

[Swagat Kumar Sahoo (JIRA)]

     [ http://opensource.atlassian.com/projects/hibernate/browse/HHH-3271?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Swagat Kumar Sahoo updated HHH-3271:
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    Attachment: PreparedStatementTest.java

This is an example of usage of the prepared statement. This test case may not work properly but gives an idea of how we use it. That means after commit, the PS is unusable. We have to manually reopen it. So, pls provide a way to reuse the same PS.

> Prepare Statement Caching
> -------------------------
>
>                 Key: HHH-3271
>                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3271
>             Project: Hibernate Core
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 3.2.5
>         Environment: Hibernate 3.2.5, Oracle 10g
>            Reporter: lalit railwani
>         Attachments: PreparedStatementTest.java
>
>
> We are using Hibernate 3.2.5 are trying to evaluate hibernate batching vis a vis JDBC batching.
> As per our results the hibernate batching takes approx 2 times the time taken by JDBC batching.
> The problem is we need to commit the batches also so in a loop we are commiting the transaction also (batching). 
> But for every new loop hibernate creates new prepared statements i.e. if we have 20 batches 20 prepared statements per table/entity are being created but in case of JDBC the same can be done using 1 prepared statement per table/entity.
> Hibernate does reuse the prepared statements within a batch but not across batches. If hibernate can reuse these statements it would significantly reduce the timings and would bring the hibernate batching close to jdbc batching.
> This is happening even after enabling prepare statement caching in the hibernate cfg xml.

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