I would do it like this for performance. You don't want to count all the records, just to see if one exists, and you don't really need to join the two files. You just want to make sure there is a match in both. The "fetch first row only" is important.
wCount=0;
exec sql select 1 into :wCount
from file
where account=123
and exists
(select * from file2 where date2=file1.date1)
Fetch first row only
-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of dfreinkel@xxxxxxxxxxxxxxxxx
Sent: Thursday, July 1, 2021 9:25 AM
To: 'RPG programming on IBM i' <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: SQL help
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I have a SQLRPGLE program with the following example
Select CASE when count(*) is null then 0 else 1 end into :wCount
From file1 inner join file2 on date1=date2
Where account = 123
I get a decimal data error and it appears that the problem is with the result, I assume. wCount is an integer. There are 2 records in the files being read.
As it is in a RPG program, I cannot use IFNULL.
I can run the statement in interactive SQL without a problem.
Does anyone have a suggestion on how to resolve this?
Thank you.
Darryl Freinkel
A4G
Telephone: 770.321.8562 Mobile: 678.355.8562
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