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From "Mamta A. Satoor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2416) Provide a shell for a subclass of SQLChar which will use the passed Collator to do the collation rather than SQLChar's default collation of UCS_BASIC
Date Fri, 09 Mar 2007 21:52:09 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2416?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12479730
] 

Mamta A. Satoor commented on DERBY-2416:
----------------------------------------

Manish, thanks for your time.

Answers to your comments
1)I like your name suggestion because it is shorter but one thing to note is that the existing
SQLChars do have collation associated with them, it's just that it happens to be the default
collation. So, if we call the subclass as SQLCharWithCollation, will it cause confusion about
collation requirement for SQLChar and the new class? 
2)As for the cut and paste, the reason behind it is we do not want to penalize the existing
SQLChar performance by addition of this new feature. Ideally, all the non-default collation
related information should go away from SQLChar because that class is supposed to work with
the default collation. As a cleanup step we should look at cleaning up methods like getIntArray
from the superclass SQLChar and have the new subclass deal with non-default collation. Note
that the existing getIntArray in SQLChar gets used for national character datatypes related
code. But since Derby doesn't support that datatype any more, we can get rid of getIntArray
entirely from SQLChar class.

> Provide a shell for a subclass of SQLChar which will use the passed Collator to do the
collation rather than SQLChar's default collation of UCS_BASIC
> -----------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-2416
>                 URL: https://issues.apache.org/jira/browse/DERBY-2416
>             Project: Derby
>          Issue Type: New Feature
>          Components: SQL
>    Affects Versions: 10.3.0.0
>            Reporter: Mamta A. Satoor
>         Assigned To: Mamta A. Satoor
>         Attachments: DERBY2416_NewCharClassWithDifferentCollationSupport_diff_v1.txt,
DERBY2416_NewCharClassWithDifferentCollationSupport_stat_v1.txt
>
>
> This jira entry is one of the tasks involved in implementing DERBY-2336.
> The existing SQLChar datatype has the Derby's default collation which is UCS_BASIC defined
on them. With Derby 10.3, we want to support an additional collation for char datatypes which
will be based on the territory. This jira issue is the placeholder for creating subclass of
SQLChar which will use the passed Collator to do the collation. The current use of this class
in Derby 10.3 will be for territory based collation but this class can be used in future for
other kinds of collations like case-insensitive etc.

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