Re: Gaps in Sequence

From: Howard J. Rogers <dba_at_hjrdba.com>
Date: Mon, 17 Jun 2002 18:48:57 +1000
Message-ID: <aek7qg$q75$1@lust.ihug.co.nz>

Can't answer the specific question (although a single rollback or failure of a transaction for some reason would suffice to cause the gap).

But the essential point is this: do not, ever, use Oracle sequences if continuity of numbering is important to you. Sequences guarantee uniqueness, nothing more. Anything else is an unreasonable expectation.

Regards
HJR "Steven" <steven.pannell_at_gmx.net> wrote in message news:aek775$6rms7$1_at_ID-82797.news.dfncis.de...
> Hi,
>
> I have sequences on all our tables in a oracle 8.1.7. database, Solaris
2.7.
> However, these sequences are not always in sequence. Sometimes there is a
> gap of 20 numbers, but also there are lots of random gaps between 2-20
> numbers. I have not stopped the database or performed any rollback and
the
> entries on the tables are entered through an application so we can be sure
> of this. This happens on all my tables. All tables are accessed through
> the same user. The default cache is 20 numbers but why the gap where there
> is no stopping of the database or rollback??
>
> Any help appreciated.
>
> Steve.
>
>
>
Received on Mon Jun 17 2002 - 03:48:57 CDT