[ic] DatabaseAuto and auto_increment

Mike Heins mike at perusion.com
Wed Nov 2 15:08:44 EST 2005

Quoting Jon Jensen (jon at endpoint.com):
> On Wed, 2 Nov 2005, JT Justman wrote:
> >I've recently set up DatabaseAuto on first my testing and now production
> >servers. I neglected to notice, however, that for tables with
> >auto_incriment set, IC still tries to set an index in the UI. If I set
> >like this:
> >
> >Database table_name AUTO_SEQUENCE 1
> >
> >in catalog/db config, as I had before, it seems to work. But, the point
> >of using DatabaseAuto was to avoid having to specify such things for
> >each table, and I've got tons of custom tables.
> Does that really work with MySQL? Does MySQL 4.1 have sequences?

It doesn't have sequences, but we emulate the behavior with

> They are 
> different than AUTO_INCREMENT columns. I believe you should be supplying 
> the sequence name, not a boolean '1'. But I haven't tried it.

1 is the same as a sequence name for MySQL. It wouldn't work for
Postgres (certainly not more than once).

> >I was looking at the DatabaseDefault code and it's a tad over my head. I
> >can only imagine that there is some kind of magic going on that pulls
> >the hash of the table info from DBI. Is there an existing mechanism that
> >can help me out here?
> I'm not aware of any. It would be nice to have. Still, using DatabaseAuto 
> saves you a fair amount of manual configuration even if you still need to 
> specify sequences separately ...

If the OP could explain precisely how we might intuit the AUTO_SEQUENCE
behavior from the SQL configuration perhaps we would. But I think we are
waiting on the Mind::Read module for Perl....

Mike Heins
Perusion -- Expert Interchange Consulting    http://www.perusion.com/
phone +1.765.647.1295  tollfree 800-949-1889 <mike at perusion.com>

For a successful technology, reality must take precedence over public
relations, for Nature cannot be fooled. -- Dick Feynman

More information about the interchange-users mailing list