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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-712) Support for sequences
Date Tue, 23 Jun 2009 18:36:07 GMT

    [ https://issues.apache.org/jira/browse/DERBY-712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12723241#action_12723241
] 

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

Hi Suran,

The altertable.diff indicates that the test was run under the old harness using the Derby
client.  Looking through the output of a full test run, which I launched earlier today, I
only see altertable.sql logged once--as an embedded test. Are you sure that you are supposed
to run this test under the Derby client?

The dropcrash2 test is one of the Store tests which is never run standalone. It depends on
the setup performed by tests which run before it in the storerecovery suite, so dropcrash2
is only run as part of that suite. You run that suite like this:

java org.apache.derbyTesting.functionTests.harness.RunSuite storerecovery

Hope this helps,
-Rick

> 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
>            Assignee: Suran Jayathilaka
>             Fix For: 10.6.0.0
>
>         Attachments: altertable.diff, catalogs_a.patch, catalogs_b.patch, catalogs_c.patch,
catalogs_d.patch, SequenceGenerator.html
>
>
> 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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