RE: Join 2 files with 1 key from each file.

John,

You cannot join and index two files with fields from each file in the index.
A join LF will not allow and field from the secondary file(s) in the index
and you cannot have an index in a SQL VIEW.  It depends on how you are
planning on accessing the data.    

You need to start debug and then look at the job log message after the SQL
is finished to see what it did not make the join work.  I have had to make
programs that respond poorly for the sole purpose of pleasing the end user.


Your SQL example below is never going to give good results in large data
sets.   The system will more than likely have to build a temporary data set
so that it can complete the data ording.  Check out the debug messages and
see if that is the case. 

You want to order by fields not in the join.  Is there a way to use those
fields in the join as well?  Is there an index that starts with those two
fields?  


Thank you,
Matt Tyler
WinCo Foods, LLC
mattt@xxxxxxxxxxxxxx


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx [mailto:rpg400-l-bounces@xxxxxxxxxxxx]
On Behalf Of Rusling, John B. (Alliance)
Sent: Wednesday, May 04, 2005 11:22 AM
To: rpg400-l@xxxxxxxxxxxx
Subject: Join 2 files with 1 key from each file.

I have 2 files I want joined and indexed on 1 key from each of the 2
files.

The 2 files are named s1 and s3, both have the common field of Order#
(on) in them

s1 JOIN s3 ON s1on = s3on .

I want the joined file indexed by s1name, then s3itno

ORDER BY s1name, s3itno .


I'm using embedded sql in rpg and everything works fine except the
response
time on one of our production machines gets to be 5+ minutes.!

---->
I want to have a prebuilt, index or logical so that when this program is
used, the response time will fall into the acceptable range.

I've built most every combination of logical file (using dds) to this
end
but the response time is still horrid.

The s1 file has 2.25 million records and the s3 file has about 2.8
million.

Can anyone give me some guidance on this please?  I've tried everything
I can think of for the last day or 2 and response time is still crappy.


Thanks for any help at all,

John B.

-- 

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