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From "Kristian Waagan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2450) Clob.Position returning wrong value when operating on Reader
Date Fri, 23 Mar 2007 10:20:32 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12483499

Kristian Waagan commented on DERBY-2450:

A few more comments and observations.

 (a) The longest search pattern we can handle if the Clob is materialized is INTEGER.MAX_VALUE.
I think this is perfectly fine :)
 (b) The number of chars to read is a tunable parameter. A new Reader object is created for
each iteration of the outer for. In addition, the new stream must skip chars up until the
current position. 256 chars per iteration seemed a bit small to me, but there is nothing wrong
with it. I guess it must be balanced between memory usage, cost per iteration and "expected
search pattern length". Opinions?
 (c) Do you know how well the position-method is tested in existing tests? If it is not that
well tested, I can volunteer to write some tests for it.

Overall I think the patch is good, but I would like the JavaDoc issue to be commented/resolved
(see my previous comment), and get feedback on my questions above.
I'll hold off the commit for a few days, but I won't object if anyone else wants to commit
it ASAP.

> Clob.Position returning wrong value when operating on Reader
> ------------------------------------------------------------
>                 Key: DERBY-2450
>                 URL: https://issues.apache.org/jira/browse/DERBY-2450
>             Project: Derby
>          Issue Type: Bug
>         Environment: all
>            Reporter: Anurag Shekhar
>         Assigned To: Anurag Shekhar
>         Attachments: derby-2250.diff, PositionTest.java

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