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NULL 'vs' zero
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Kal
Silver Member
posted
Hi All -
Is there a way to seperate 'NULL' & 0 for an INT column of a 'SQL server' data source.

I am using SQLpassthru & trying to code in a Filter for 'NULL' like:

-SET NODATA = '' ;
-SET &WHERE = IF &VAR1 EQ '' THEN 'WHERE VAR IS NULL' ELSE 'WHERE VAR =' | &VAR1

SQL SQLMSS PREPARE SQLOUT FOR
SELECT * FROM TABLE WHERE &WHERE

The problem is this logic is not taking 'WHERE VAR = 0' For a zero value coming from data source.

-Any suggestions, much appreciated!

Thanks,
-Kal.


----------------------------------
WFS - V7.6.8 Servlet on Win2k3 VM, Tomcat, ResourceAnalyzer;
DevStudio - R7.6.8, FlexEnable,VisDis; MRE/BID/self-service/Rcaster/ Office2k3;
DB-SQL2005;
 
Posts: 33 | Location: MN | Registered: May 17, 2005Report This Post
FrankDutch
Virtuoso
posted Hide Post
Why not just write

SELECT * FROM TABLE
WHERE VAR IS NULL OR 0;

I tried this in access

SELECT *
FROM Table1
WHERE (((Table1.var) Is Null)) OR (((Table1.var)=0));




Frank
prod: WF 7.6.10 platform Windows,
databases: msSQL2000, msSQL2005, RMS, Oracle, Sybase,IE7
test: WF 7.6.10 on the same platform and databases,IE7

 
Posts: 2387 | Location: Amsterdam, the Netherlands | Registered: December 03, 2006Report This Post
dwf
Platinum Member
posted Hide Post
Kal,

Can't tell for sure, but you're problem may relate to the way Dialogue Manager treats zero in DM variables. I copies this from an IBI advanced search entry. Maybe it's relevant. Maybe not.

Symptom:

How to distinguish between a dot, a blank and a zero, in Dialogue Manager


Problem:

Dialogue Manager treats incoming values as either character strings or
numeric strings. Problem is that character string can contain numbers.
The ASIS function was created for this purpose


Solution:

-*ET &INPT='0';
-*ET &INPT=' ';
-SET &INPT='.' | X;
-SET &OUTPUT = IF ASIS(&INPT) EQ ' ' THEN 'BLANK' ELSE
-IF ASIS(&INPT) EQ '0' THEN 'ZERO' ELSE
-IF ASIS(&INPT) EQ '.X' THEN 'DOT' ELSE 'OTHER';
-TYPE &INPT &OUTPUT


dwf
 
Posts: 135 | Location: Portland, OR | Registered: March 23, 2005Report This Post
Kal
Silver Member
posted Hide Post
Hi Frank -
That was my issue- that the DM is giving a null for even a '0' value in the database & I wanted to differentiate! Thanks for your timely response!

Hi Dwf -
ASIS() worked!!
The explanation was very helpful, Thanks very much!!

Regards,
Kal.


----------------------------------
WFS - V7.6.8 Servlet on Win2k3 VM, Tomcat, ResourceAnalyzer;
DevStudio - R7.6.8, FlexEnable,VisDis; MRE/BID/self-service/Rcaster/ Office2k3;
DB-SQL2005;
 
Posts: 33 | Location: MN | Registered: May 17, 2005Report This Post
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