RE: SQL vs. traditional I/O?

["Bramley, Stu" <stu.bramley@xxxxxxxxxxxxx>]

Given that you know the lower and upper limits then if the SQL statement
said something like:

select * from j4pp1 where key1 >= ('1') and key1 <= char(:count) 

Then the cursor wouldn't need to be closed every time..

Cheers,
Stu

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James Rich
Sent: Friday 23 July 2004 10:55
To: Midrange Systems Technical Discussion
Subject: RE: SQL vs. traditional I/O?


On Thu, 22 Jul 2004, Joe Pluta wrote:

> c                   for       x = 1 to count
> c                   eval      mykey = %char(count)
> c/EXEC SQL declare c cursor for select * from j4pp1 where key1 = :mykey
> c/END-EXEC
> c/EXEC SQL open c
> c/END-EXEC
> c/EXEC SQL fetch from c into :j4pp1
> c/END-EXEC
> c/EXEC SQL close c
> c/END-EXEC
> c                   enddo

Can this be restructured in such a way that it doesn't required opening
and closing the cursor for every iteration through the loop?  That seems
awful wasteful and could be responsible for a large amount of the
performance difference.  Maybe SQL is still slower, but it seems like this
opening/closing of the cursor needs to be removed from the loop in order
to make an appropriate comparison.  If they can't be removed, this seems
like another example of the shortcomings of the way SQL is used within RPG
more than a problem with SQL itself.

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