The best answer I can give is that it's in the docs - it's been years since
I've declared one.

Roughly, from memory, it's something like:
DECLARE EXTERNAL FUNCTION lower
cstring(2000)
returns cstring(2000) free_it
entry_point "IB_UDF_lower' MODULE_NAME 'ib_udf';

Have a look in the PDF's that came with Firebird, and on the Firebird site.
No doubt knowledgeable people in this list will correct my
recollection...;-)

Nige

> -----Original Message-----
> From: Martin Catherall [mailto:mc@...]
> Sent: Thursday, 10 February 2005 11:10 AM
> To: firebird-support@yahoogroups.com
> Subject: RE: [firebird-support] convert field to lower/upper case in
> where clause
>
>
>
> Hi Nigel,
>
> I am using firebird 1.03, the lower and upper function do not
> work when
> i do the following query in IBEXPERT
>
> select * from tblTest where lower(tblTest.first_name) = 'james';
>
> I get
> An error was found in the application program input parameters for the
> SQL statement.
> Dynamic SQL Error.
> SQL error code = -804.
> Function unknown.
> LOWER.
>
> (note that the lower function I used was lower case, however I also
> tried upper case)
>
> please could you tell me how to decalare the external functions (do I
> have to do this in firebird)????
>
> cheers
>
> martin.
>
>
> -----Original Message-----
> From: Nigel Weeks [mailto:nweeks@...]
> Sent: Thursday, 10 February 2005 1:03 p.m.
> To: firebird-support@yahoogroups.com
> Subject: RE: [firebird-support] convert field to lower/upper case in
> where clause
>
>
>
>
> > trouble is I'm not sure how to convert a field to lower case.
> > to get the gist of what I am trying to acheive I have
> > included the where
> > clause below -- which does not work.
> >
> > select * from tblTest
> > where LCASE(tblTest.first_name) = 'james'
> >
>
> You've almost got it!
>
> select * from tblTest where lower(tblTest.first_name) = 'james';
>
> Nige.
>
> ps. I think the lower() and upper() are (still) UDF's, so
> remember to
> declare the external functions if they don't work. I could be
> wrong on
> this...!!!
>
>
>
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