RE: Select Row

["DeLong, Eric" <EDeLong@xxxxxxxxxxxxxxx>]

The RRN technique breaks as soon as you need an order by.  There's no way
(besides making a temporary table) to use the RRN values for ordered
recordsets.

Eric DeLong
Sally Beauty Company
MIS-Project Manager (BSG)
940-898-7863 or ext. 1863



-----Original Message-----
From: Haas, Matt [mailto:Matt.Haas@xxxxxxxxxxxxxxxxxxx]
Sent: Thursday, May 15, 2003 8:40 AM
To: RPG programming on the AS400 / iSeries
Subject: RE: Select Row


Steve,

I saw your post almost right after I sent mine (it takes forever for my
e-mails to make the round trip for some reason) and you're right, the fetch
xx rows does work on V5R1. Thanks for sharing that, I'm sure it will come in
handy.

As for the RRN trick, I didn't mean to say it doesn't work at all, I meant
to say it isn't all that useful for selecting x number of rows on real world
files. For example, let's say you try your example where CUNBR > 9000 and
CUNBR < 10000 and RRN < 10. Chances are, none of these records will have a
RRN less than 10 so you get no data.

Matt

-----Original Message-----
From: Steve Landess [mailto:steve_landess@xxxxxxxxxxx]
Sent: Thursday, May 15, 2003 9:05 AM
To: RPG programming on the AS400 / iSeries
Subject: Re: Select Row


>Matt wrote:

> Ren,
> Prior to V5R2 (I think this is part of V5R2), you can't do this with a
SELECT statement. The relative record number idea will only work if there
are no deleted records and you don't use a where clause which, IMHO, makes
this trick all but useless in most cases.

Matt:

I don't know about prior releases, but both of the following SQL statements
work on V5R1:

select *from cusmst fetch first 2 rows only
SELECT statement run complete.

SELECT * FROM cusmst WHERE CUNBR < 100 AND rrn(cusmst) < 10
SELECT statement run complete.

Steve Landess
Austin, Texas
(512) 423-0935

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