Gidday Chris,
All the fields are coming form the same file and none of the fields are
null capable therefore if a record is retrieved all fields in the sum will
be valid numeric values and if no record is retrieved the coalesce on the
entire statement will return 0.
If however the fields were coming from different tables then I agree that
coalesce should be applied to each individual field.
Thank you for your feedback
Don Brown
From: "Hiebert, Chris" <chris.hiebert@xxxxxxxxxxxxxx>
To: "Midrange Systems Technical Discussion" <midrange-l@xxxxxxxxxxxx>
Date: 04/10/2017 12:23 AM
Subject: RE: SQL0305 Message in 5000 page joblog
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
This may be a very "bad" fix because this will skip a row if *any* of the
values are null.
If 4 out of 5 of the fields contain a value, do you really want to omit
the row?
Or would you rather just zero out that single column?
That is the reason multiple people have already suggested this:
sum(coalesce(uddamt,0) + coalesce(uddaoa,0) +
coalesce(uddeam,0) - coalesce(uddcct,0) - coalesce(uddbkf,0))
Chris Hiebert
Senior Programmer/Analyst
Disclaimer: Any views or opinions presented are solely those of the author
and do not necessarily represent those of the company.
-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Don
Brown
Sent: Monday, October 2, 2017 4:06 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Re: SQL0305 Message in 5000 page joblog
Thank you to all who replied.
I have modified the sql as follows which has solved the issue - joblog now
down to 3 pages.
TotAmt = 0;
select COALESCE(sum(uddamt + uddaoa + uddeam - uddcct - uddbkf), 0) into
:TotAmt
Just to reply to a couple of questions raised;
All the fields in the sum( ) are from the same file and are numeric fields
so if a record is retrieved there will not be null values in any of the
summed fields.
The where clause did result in no records found quite commonly and
therefore the reason the SQL0305 was being received - no records found =
null result. But the TotAmt was initialised to zero so while the sql
statement resulted in a null result the return value was still zero.
And I have removed the sql prefix from the variable :-)
Cheers
Don Brown
From: "Sam_L" <lennon_s_j@xxxxxxxxxxx>
To: midrange-l@xxxxxxxxxxxx
Date: 03/10/2017 03:46 AM
Subject: Re: SQL0305 Message in 5000 page joblog
Sent by: "MIDRANGE-L" <midrange-l-bounces@xxxxxxxxxxxx>
Don,
This suggestion from Steve appears to be what you should be doing:
select (sum(coalesce(uddamt,0) + coalesce(uddaoa,0) +
coalesce(uddeam,0) - coalesce(uddcct,0) - coalesce(uddbkf,0)) into
:sqlToaAmt from your_table
From what I can tell, you are using 4 files and selecting just one field,
which is the sum over 5 fields. I can't tell from the names, but I'd
guess that the 5 fields come from at least two different files.
So, probably one (or more) of the joined files has no matching record and
the field from that file results in a null value. This null in turn
results in the sum returning a null.
Depending on your underlying logic, the program may currently be returning
incorrect results. I'd hazard a guess that if you change it to use
coalesce, you'll get different results from the original program using the
same data.
Sam
(Is the program checking SQLCOD or SQLSTATE after the select statement?
If not, it should.)
On 10/2/2017 8:35 AM, Steve Needles wrote:
Don,
I think that your math will fail as presented if any of the variables
is
null. I don't know if it would result in an SQL0305 error or not.
You need to resolve each potentially null variable before being able
to
use it in a SUM scalar function. I think that you will need something
like:
select (sum(coalesce(uddamt,0) + coalesce(uddaoa,0) +
coalesce(uddeam,0)
- coalesce(uddcct,0) - coalesce(uddbkf,0)) into :sqlToaAmt from
your_table
Otherwise you are attempting math on invalid values. Nulls aren't
numbers after all.
Steve Needles
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