db-jdo-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Andy Jefferson (JIRA)" <j...@apache.org>
Subject [jira] Updated: (JDO-660) Ability to specify positioning of field 'column(s)' in datastore "table"
Date Fri, 01 Oct 2010 18:06:34 GMT

     [ https://issues.apache.org/jira/browse/JDO-660?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Andy Jefferson updated JDO-660:
-------------------------------

    Attachment: column_position.patch

Replacement patch relative to start-point DTD/XSD

> Ability to specify positioning of field 'column(s)' in datastore "table"
> ------------------------------------------------------------------------
>
>                 Key: JDO-660
>                 URL: https://issues.apache.org/jira/browse/JDO-660
>             Project: JDO
>          Issue Type: New Feature
>          Components: api, specification, tck
>            Reporter: Andy Jefferson
>             Fix For: JDO 3 maintenance release 1
>
>         Attachments: column_position.patch
>
>
> With an RDBMS datastore, when generating the schema, it is desirable to be able to specify
the positioning of the column(s) of a field in the generated table. 
> With spreadsheet documents, it is critical to be able to define which column number is
used for a particular field.
> With other datastores it is also likely desirable.
> To achieve this I propose adding an attribute to the XML <column> called "position".
Similarly for the @Column annotation.
> This can take integer values with 0-origin.
> Complications : 
> 1. how this is handled when we have inheritance. If a root class has subclass-table inheritance,
then those fields are persisted into the tables of all subclasses, and we may want to override
the positions for those individually - to that end the user can override the metadata of the
superclass fields. 
> 2. anything else ?

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message