[jira] Commented: (DERBY-712) Support for sequences

["Zied Hamdi (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12516727 ] 

Zied Hamdi commented on DERBY-712:
----------------------------------

Hi people there,

I'm using derby as a jee/jpa application endpoint (through hibernate), before I encountred this missing feature Derby seamed to me the perfect product, evolving drastically even in performance if I beleive what was said in the sun tech days(compared to mySql). I think the sequence mecanism is one that should be implemented by a serious database like Derby, one -but not the only- good reason for that is that persistence frameworks are more and more present in applications, and to have portability between databases (to be able to migrate to Derby), it's important to have this feature that I imagine doesn't take a lot to implement / compared to what it brings to users.

I'll try the @TableGenerator approach, hoping it will work.

Regards,
Zied Hamdi

> Support for sequences
> ---------------------
>
>                 Key: DERBY-712
>                 URL: https://issues.apache.org/jira/browse/DERBY-712
>             Project: Derby
>          Issue Type: New Feature
>          Components: SQL
>         Environment: feature request 
>            Reporter: Tony Dahbura
>
> Would like to see support added for sequences.  This would permit a select against the sequence to always obtain a ever increasing/decreasing value.  The identity column works fine but there are times for applications where the application needs to obtain the sequence number and use it prior to the database write.  Subsequent calls to the table/column would result in a new number on each call.
> SQL such as the following:
> SELECT NEXT VALUE FOR sequence_name FROM sometable ; would result in a next value.

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