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From Øystein Grøvlen (JIRA) <j...@apache.org>
Subject [jira] Updated: (DERBY-2495) Create framework for calling locator related stored procedures from client
Date Mon, 16 Apr 2007 13:52:15 GMT

     [ https://issues.apache.org/jira/browse/DERBY-2495?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Øystein Grøvlen updated DERBY-2495:
-----------------------------------

    Attachment: derby-2459-followup.diff

This follow-up patch, derby-2495/trunk/derby-2459-followup.diff, contains mostly javadoc changes
etc.  In addition, a 'return new String("")' had been changed to 'return ""'.

M      java/client/org/apache/derby/client/am/PreparedStatement.java
M      java/client/org/apache/derby/client/am/CallableLocatorProcedures.java

> Create framework for calling locator related stored procedures from client
> --------------------------------------------------------------------------
>
>                 Key: DERBY-2495
>                 URL: https://issues.apache.org/jira/browse/DERBY-2495
>             Project: Derby
>          Issue Type: Sub-task
>          Components: Network Client
>            Reporter: Øystein Grøvlen
>         Assigned To: Øystein Grøvlen
>             Fix For: 10.3.0.0
>
>         Attachments: blobframework.diff, blobframework_v2.diff, blobframework_v2.diff,
derby-2459-followup.diff
>
>
> The client JDBC driver will need to call stored procedures (ref DERBY-2257) to operate
on LOBs identified by locators.  We should create a framework that implement the stored procedure
calls.  This way, the rest of the client code can call methods in this framework when needing
to call the stored procedures without having to prepare SQL statements themselves.  
> The framework should make sure that prepared statements are reused within a connection.
 Each procedure call should only be prepared once per connection.
> Since LOBs can not be parameters to stored procedures, the framework should make sure
that calls involving a byte[] or String that does not fit in a VARCHAR (FOR BIT DATA), are
split into several calls each operating on a fragment of the LOB.

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