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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-712) Support for sequences
Date Mon, 07 Dec 2009 15:23:21 GMT

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

Rick Hillegas updated DERBY-712:
--------------------------------

    Attachment: derby-712-02-aa-privilegeNodeCleanup.diff

Attaching derby-712-02-aa-privilegeNodeCleanup.diff. This slightly reworks the code in PrivilegeNode
so that it will be easier to add the USAGE privilege. GrantRevokeDDLTest runs cleanly. I intend
to commit this patch if the full regression tests pass.

This patch makes the following changes:

1) Abstracts out the notion of a qualified objectName, which is common to all privileges.

2) Moves the self-revoke check outside the individual bind() cases so that it doesn't have
to be repeated for each case.

3) Adds braces around dangling conditional consequences because, in my experience, unbraced
single-line consequences are a brittle source of bugs.


Touches the following file:

M      java/engine/org/apache/derby/impl/sql/compile/PrivilegeNode.java


> 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
>
>
> 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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