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From "Dag H. Wanvik (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-712) Support for sequences
Date Mon, 31 Jan 2011 17:42:29 GMT

    [ https://issues.apache.org/jira/browse/DERBY-712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12988808#comment-12988808
] 

Dag H. Wanvik commented on DERBY-712:
-------------------------------------

Thanks, Brett. I just did. It will take some time before the update is reflected on the web
site, though.

> Support for sequences
> ---------------------
>
>                 Key: DERBY-712
>                 URL: https://issues.apache.org/jira/browse/DERBY-712
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>         Environment: feature request 
>            Reporter: Tony Dahbura
>            Assignee: Suran Jayathilaka
>             Fix For: 10.6.1.0
>
>         Attachments: SequenceGenerator.html, SequenceGenerator.html, altertable.diff,
catalogs_a.patch, catalogs_b.patch, catalogs_c.patch, catalogs_d.patch, catalogs_e.patch,
catalogs_f.patch, catalogs_f_2.patch, catalogs_g.diff, catalogs_h.diff, create_drop_sequence_a.patch,
create_drop_sequence_b.patch, create_drop_sequence_c.patch, create_drop_sequence_d.patch,
create_sequence_a.patch, createseq_args_bind_a.diff, createseq_args_bind_b.diff, derby-712-02-aa-privilegeNodeCleanup.diff,
derby-712-03-aa-usagePrivilege.diff, derby-712-03-ac-usagePrivilege.diff, derby-712-04-aa-dblook.diff,
derby-712-05-af-sequenceGenerator.diff, derby-712-05-al-sequenceGenerator.diff, derby-712-06-aa-restrictedDrops.diff,
sequences_next_value_a.patch
>
>
> 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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