RE: Retrieving 1, and only 1, row in SQL

["Dan Bale" <dbale@xxxxxxxxx>]

Does SQL have something similar to the OPNQRYF's UNIQUEKEY(1) parameter?
Maybe you need to use that for this one case?  YMMV.

Dan Bale
SAMSA, Inc.
989-790-0507
DBale@SAMSA.com <mailto:DBale@SAMSA.com>
  Quiquid latine dictum sit altum viditur.
  (Whatever is said in Latin seems profound.)


-----Original Message-----
From: midrange-l-admin@midrange.com
[mailto:midrange-l-admin@midrange.com]On Behalf Of rob@dekko.com
Sent: Friday, March 15, 2002 2:28 PM
To: midrange-l@midrange.com
Subject: Retrieving 1, and only 1, row in SQL



The file being queried is QSYS2/SYSCOLUMNS.  This file has 6.6million
records on our development box.  There are no keys on the file and I am not
going to create an index on an IBM supplied file.

The following subprocedure is used to access the file.  The point of this
subprocedure is threefold depending on how it is called.  One, determine
the existence of the library.  Two determine the existence of the file.
Three determine the existence of the field.  Performance is fast on the
field check and the file check.  Performance plummets on the file check.
For example a check on one of our BPCS data libraries returned a count of
81,390 and took about a minute.

<snip>