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From "Dag H. Wanvik (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5505) BLOB and CLOB Reference Manual topics could use some fixes
Date Fri, 18 Nov 2011 14:24:51 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13152890#comment-13152890
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Dag H. Wanvik commented on DERBY-5505:
--------------------------------------

Thanks for improving our docs in this area, Kim! 

Kim> I can get rid of the error either by commenting out the first statement or by rewriting
the second one as follows: 

This is because we now enforce the JDBC recommendation that result set columns be read only
once (and in order, not sure if we enforce that, I believe not) for maximum portability. 
It turned out to be hard to allow multiple reads of a lob result set column in the general
case, so I think Kristian implemented this new restriction. I think we do no enforce it for
non-lob columns, though.

I'll have a look at your new sample programs.
                
> BLOB and CLOB Reference Manual topics could use some fixes
> ----------------------------------------------------------
>
>                 Key: DERBY-5505
>                 URL: https://issues.apache.org/jira/browse/DERBY-5505
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions: 10.8.2.2
>            Reporter: Kim Haase
>            Assignee: Kim Haase
>            Priority: Minor
>         Attachments: blobex.java, clobex.java
>
>
> The Reference Manual documentation on BLOBs and CLOBs has some gaps that I would like
to fill as a result of my efforts to insert a BLOB into a table column. This should affect
the following topics:
> CAST function (rrefsqlj33562.dita)
> CLOB data type (rrefclob.dita)
> BLOB data type (rrefblob.dita)
> A comment will provide further details.

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