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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-712) Support for sequences
Date Sat, 26 Dec 2009 16:24:29 GMT

    [ https://issues.apache.org/jira/browse/DERBY-712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12794633#action_12794633
] 

Rick Hillegas commented on DERBY-712:
-------------------------------------

Thanks Suran. The patch looks good. I made a couple changes:

1) I fixed DBMSNodes.properties. The addition of the NextSequenceNode to the jar file pushed
the DropSequenceNode out of the jar file.

2) I changed the test case for NEXT VALUE FOR to call execute() rather than executeUpdate().
The latter call kills the statement.

With these changes, the regression tests passed cleanly for me. Committed at subversion revision
894002. Thanks!

> 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: 10.6.0.0
>
>         Attachments: 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, derby-712-02-aa-privilegeNodeCleanup.diff,
SequenceGenerator.html, 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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