Re: SQL Question: Combine Several Rows Into One Column?

Also, while it works OK, the TRIM() would be more appropriate as in:

SET STR = (STR || ' ' || trim(subtype)) ;

Assuming, of course, that SUBTYPE is defined as a CHAR variable, instead of
VARCHAR.


Regards,

Luis Rodriguez
IBM Certified Systems Expert — eServer i5 iSeries


On Wed, Apr 7, 2010 at 12:17 PM, Luis Rodriguez <luisro58@xxxxxxxxx> wrote:

Mike,

The FOR_LOOP tag is totally redundant (a leftover from a previous version
of the UDF) and you can delete it without problems (I hope :-) )

Regards,

Luis Rodriguez
IBM Certified Systems Expert — eServer i5 iSeries


On Wed, Apr 7, 2010 at 12:10 PM, Luis Rodriguez <luisro58@xxxxxxxxx>wrote:

Mike,

The follownig UDF works for me:

***********************************

Drop Function
qgpl/SubTypeTXT;

Create Function qgpl/SubTypeTXT (InputType Numeric(1, 0) )
Returns varchar(1024)
Language SQL
Returns null on null input
Deterministic
Begin
Declare Str VarChar(1024);
Set Str = '' ;
for_loop:
for rec as (
SELECT Subtype FROM @TEST/MikeTAB
WHERE TypeNum = InputType
)
DO
IF rec.SubType is not null THEN
SET STR = (trim(STR) || ' ' || subtype) ;
END IF;
END FOR for_loop;
RETURN STR ;
End

*****************************

Please be aware that this is a VERY basic UDF, almost not checking and
very simple. Also, the only way you can be sure of the sequence of records
in a SQL table is using the ORDER BY clause, so you need a good sequence
field (timestamp, id value, etc) in order to avoid sending your swimsuit to
Calgary...

HTH,

Luis Rodriguez
IBM Certified Systems Expert — eServer i5 iSeries


On Wed, Apr 7, 2010 at 11:47 AM, Michael Naughton <
michael_naughton@xxxxxxxxxxxx> wrote:

Thanks, Alan, and also to Luis, who suggested recursive views. I've
played around some, but nothing is really working yet. I'm coming to the
conclusion that the easiest thing will be to write a UDF using good old RPG
...

Mike Naughton
Senior Programmer/Analyst
Judd Wire, Inc.
124 Turnpike Road
Turners Falls, MA 01376
413-676-3144
Internal: x 444
mnaughton@xxxxxxxxxxxx
****************************************
NOTICE: This e-mail and any files transmitted with it are confidential
and solely for the use of the intended recipient. If you are not the
intended recipient or the person responsible for delivering to the intended
recipient, be advised that any use is
strictly prohibited. If you have received this e-mail in error, please
notify us immediately by replying to it and then delete it from your
computer.

--
This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing
list
To post a message email: MIDRANGE-L@xxxxxxxxxxxx
To subscribe, unsubscribe, or change list options,
visit: http://lists.midrange.com/mailman/listinfo/midrange-l
or email: MIDRANGE-L-request@xxxxxxxxxxxx
Before posting, please take a moment to review the archives
at http://archive.midrange.com/midrange-l.