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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3907) Save useful length information for Clobs in store
Date Thu, 08 Jan 2009 10:28:59 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Kristian Waagan updated DERBY-3907:

    Attachment: derby-3907-3b-readertoutf8stream_cleanup.diff

Attaching patch 3b.
I had to pull parts of the patch out. The error reporting for truncation failure during insert
from a stream isn't adequate, and requires additional work. I filed DERBY-4005 for some of
it, but I expect there will be another Jira as well.

The patch now changes ReaderToUTF8Stream and UTF8UtilTest only. See commit message for more
detailed description of changes.

Committed 3b to trunk with revision 732676.

> Save useful length information for Clobs in store
> -------------------------------------------------
>                 Key: DERBY-3907
>                 URL: https://issues.apache.org/jira/browse/DERBY-3907
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC, Store
>    Affects Versions:
>            Reporter: Kristian Waagan
>            Assignee: Kristian Waagan
>         Attachments: derby-3907-1a-alternative_approach.diff, derby-3907-2b-header_write_preparation.diff,
derby-3907-2b-header_write_preparation.stat, derby-3907-3a-readertoutf8stream_cleanup.diff,
derby-3907-3a-readertoutf8stream_cleanup.diff, derby-3907-3a-readertoutf8stream_cleanup.stat,
> The store should save useful length information for Clobs. This allows the length to
be found without decoding the whole data stream.
> The following thread raised the issue on what information to store, and also contains
some background information: http://www.nabble.com/Storing-length-information-for-CLOB-on-disk-tp19197535p19197535.html
> The information to store, and the exact format of it, is still to be discussed/determined.
> Currently two bytes are set aside for length information, which is inadequate.

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