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From "Daniel John Debrunner (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2336) Enable collation based ordering for CHAR data type.
Date Wed, 07 Mar 2007 00:53:24 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2336?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12478660
] 

Daniel John Debrunner commented on DERBY-2336:
----------------------------------------------

On the metadata, I think the store stores more information that just the format identifiers
for an index.
The class BTree has a number of fields that seem to be metadata for the index including the
ascending/descending status for each column.
How flexible is that metadata? can additional information be added without requiring an upgrade
of previous versions, e.g. if information
about column collation was added?

And does each index/table have a set of properties associated with it that could be used to
store metadata?

> Enable collation based ordering for CHAR data type.
> ---------------------------------------------------
>
>                 Key: DERBY-2336
>                 URL: https://issues.apache.org/jira/browse/DERBY-2336
>             Project: Derby
>          Issue Type: Sub-task
>          Components: SQL
>    Affects Versions: 10.3.0.0
>            Reporter: Mamta A. Satoor
>         Attachments: DERBY_LocalFinder_CodeCleanup_diff_V01.txt, DERBY_LocalFinder_CodeCleanup_stat_V01.txt
>
>
> I am breaking down the Parent task DERBY-1478 (Add built in language based ordering and
like processing to Derby) into multiple sub tasks. One of them is to concentrate on enabling
the collation based ordering on (hopefully the simplest of all the character data types) CHAR
data type. This task in itself might need subtasks if it is later found that it can be subdivided
into multiple smaller steps.

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