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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3326) Introduce a caching logical connection and logical prepared statement in the client driver
Date Fri, 15 Feb 2008 17:20:08 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3326?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Kristian Waagan updated DERBY-3326:
-----------------------------------

    Attachment: derby-3326-3a-new_classes.stat
                derby-3326-3a-new_classes.diff

'derby-3326-3a-new_classes.diff' introduces the new classes to support statement pooling.
Note that some of the classes are almost pure forwarding classes, and the patch basically
contains two classes with special logic (LogicalStatementEntity and StatementCacheInteractor),
two connection classes with special logic and four forwarding classes (two for each of Prepared-
and CallableStatement).
The "special logic classes" were introduced because I cannot inherit from two classes. I'm
sure there are other design choices too.

I'm not quite happy with the code in LogicalStatementEntity, any suggestions for improvement?
Further, these things need more work:
 1) Integrate DERBY-3192 (compilation schema)
 2) The 'am.PreapredStatement.reset(true)' is just a "placeholder", and I have to check it
and possibly write a special reset method for pooling.

If I get no major pushback on the design/approach, I will commit the patch rather quickly
as part of incremental development. The code won't be enabled yet anyway.

Patch ready for review.

> Introduce a caching logical connection and logical prepared statement in the client driver
> ------------------------------------------------------------------------------------------
>
>                 Key: DERBY-3326
>                 URL: https://issues.apache.org/jira/browse/DERBY-3326
>             Project: Derby
>          Issue Type: Sub-task
>          Components: JDBC, Network Client
>    Affects Versions: 10.4.0.0
>            Reporter: Kristian Waagan
>            Assignee: Kristian Waagan
>             Fix For: 10.4.0.0
>
>         Attachments: derby-3326-1a_cpds_testing_preparation.diff, derby-3326-1a_cpds_testing_preparation.stat,
derby-3326-1b_cpds_testing_preparation.diff, derby-3326-2a-method_rename.diff, derby-3326-3a-new_classes.diff,
derby-3326-3a-new_classes.stat
>
>
> A logical connection with statement caching capabilities is required to support JDBC
prepared statement pooling. Further, a logical prepared statement object is also needed.
> The logical prepared statements will be generated by the logical connection's 'prepareStatement'-method.

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