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Posted to derby-dev@db.apache.org by "Dag H. Wanvik (JIRA)" <de...@db.apache.org> on 2006/10/03 19:19:20 UTC
[jira] Updated: (DERBY-1918) INCREMENT of IDENTITY column described
as allowing a value of zero in reference manual
[ http://issues.apache.org/jira/browse/DERBY-1918?page=all ]
Dag H. Wanvik updated DERBY-1918:
---------------------------------
Fix Version/s: 10.3.0.0
Affects Version/s: 10.2.1.6
10.2.2.0
10.3.0.0
> INCREMENT of IDENTITY column described as allowing a value of zero in reference manual
> --------------------------------------------------------------------------------------
>
> Key: DERBY-1918
> URL: http://issues.apache.org/jira/browse/DERBY-1918
> Project: Derby
> Issue Type: Bug
> Components: Documentation
> Affects Versions: 10.2.1.6, 10.3.0.0, 10.2.2.0
> Reporter: Dag H. Wanvik
> Priority: Trivial
> Fix For: 10.3.0.0
>
>
> In the description of how INCREMENT work with IDENTITY columns, th
> reference manual is out of step with the implementation in the following respect
> (quote from http://db.apache.org/derby/docs/10.2/ref/rrefsqlj37836.html):
> > By default, the initial value of an identity column is 1, and the
> > amount of the increment is 1. You can specify non-default values for
> > both the initial value and the interval amount when you define the
> > column with the key words STARTS WITH and INCREMENT BY. And if you
> > specify a negative number for the increment value, Derby decrements
> > the value with each insert. If this value is 0, or positive, Derby
> ******************
> > increments the value with each insert.
> In fact, the implementation does not allow a value of zero, but gives
> error 42Z21 (LANG_AI_INVALID_INCREMENT):
> ij> create table f (i int generated by default as identity (start with 1, increment by 0), j int);
> ERROR 42Z21: Invalid increment specified for identity for column 'I'. Increment cannot be zero.
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