At 06:47 AM 20/07/2004 +0000, you wrote:

>--- In firebird-support@yahoogroups.com, Helen Borrie <helebor@t...>
>wrote:
> >
> > >What I wan't to do is extracting PKs from a string
> > >which is delivered by my app.
> >
> > If you're using Firebird, don't use a UDF for substring, use the
> > SUBSTRING() internal function.
>
>Where can I find information about such functions?
>I'm still using 'IB 6 Language Reference' and there this
>function is not mentioned.

Release notes. (PDF file in your Firebird installation). For full
documentation, get both 1.0 and 1.5 release notes. You can pick up German
versions from the Main Downloads page at www.ibphoenix.com.

/heLen