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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-712) Support for sequences
Date Fri, 12 Jun 2009 15:40:07 GMT

    [ https://issues.apache.org/jira/browse/DERBY-712?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12718882#action_12718882
] 

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

My regression test run finished. As expected, the catalogs_b.patch introduces a number of
errors, largely related to the fact that the existing tests need to be made aware of the new
catalogs:

Failures in tests run under the old harness:

altertable
compressTable
dropcrash2

Failures in JUnit tests:

SystemCatalogTest
DatabaseMetaDataTest
PrimaryKeyTest
ViewsTest
metadataMultiConnTest
OfflineBackupTest
CollationTest
GrantRevokeDDLTest
DMDBugsTest
ToolScripts


> 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: catalogs_a.patch, catalogs_b.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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