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Date: Wed, 9 Jul 2008 07:43:31 -0700 (PDT)
From: "Kristian Waagan (JIRA)" <jira@apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Updated: (DERBY-3768) Make EmbedBlob.length use skip instead
 of read
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     [ https://issues.apache.org/jira/browse/DERBY-3768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Kristian Waagan updated DERBY-3768:
-----------------------------------

    Attachment: derby-3768-2a-misc_fixes.diff

'derby-3768-2a-misc_fixes.diff' contains a set of small fixes:
 - JavaDoc improvements
 - set locator value explicitly to indicate default value (must not be a valid locator)
 - renamed 'myLength' to 'streamLength'
 - keep variables 'materialized' and 'streamLength' in sync
 - throw exception in second constructor (mistakenly swallowed)
 - only clear LOB mapping if a mapping has been created

Awaiting test run completion.
Patch ready for review.

> Make EmbedBlob.length use skip instead of read
> ----------------------------------------------
>
>                 Key: DERBY-3768
>                 URL: https://issues.apache.org/jira/browse/DERBY-3768
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC
>    Affects Versions: 10.5.0.0
>            Reporter: Kristian Waagan
>            Assignee: Kristian Waagan
>            Priority: Minor
>             Fix For: 10.5.0.0
>
>         Attachments: derby-3768-1a-length_skip.diff, derby-3768-1b-length_skip.diff, derby-3768-2a-misc_fixes.diff
>
>
> EmbedBlob.length uses read to process the whole Blob when the length has not been encoded at the head of the stream.
> Using skip instead of read can lead to better performance.
> I also plan to make some minor cleanups under this issue; JavaDoc and to rename a variable.

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