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Focal Point    Focal Point Forums  Hop To Forum Categories  WebFOCUS/FOCUS Forum on Focal Point     Testing a NULL value after the -READ command

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Testing a NULL value after the -READ command
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<ludo>
posted
Hi,

How can I test if the value that I have read with the -READ command is not null? I tested with this

SET NODATA = '00'


but it doesn't work.

Somebody have an idea?
 
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GamP
Virtuoso
posted Hide Post
With -READ you read a certain value into an &-variable.
This &var will always contain a value and if you do not specify anything, the value of the &var will be interpreted before it is being used in a comparison.
To prevent Dialog Manager from first interpreting and then evaluating, you can use the asis-phrase like:
-IF ASIS(&VAR) EQ '0'
For further info on this see:
this IB article.


GamP
- Using AS 8.2.01 on Windows 10 - IE11.
in Focus since 1988
 
Posts: 1961 | Location: Netherlands | Registered: September 25, 2007Report This Post
<ludo>
posted
Thanks Gamp but when I use the ASIS function, I always have the same message:

(FOC295) A VALUE IS MISSING FOR: &EFDECI
 
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GinnyJakes
Expert
posted Hide Post
How are you creating the file that you are reading?

Have you tried testing the length?

-IF &EFDECI.LENGTH EQ 0 THEN ...


Ginny
---------------------------------
Prod: WF 7.7.01 Dev: WF 7.6.9-11
Admin, MRE,self-service; adapters: Teradata, DB2, Oracle, SQL Server, Essbase, ESRI, FlexEnable, Google
 
Posts: 2723 | Location: Ann Arbor, MI | Registered: April 05, 2006Report This Post
<ludo>
posted
quote:
ave you tried testing the length?


Great it seems to work I'm going into next step of my developments

Thx GinnyJakes
 
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Tony A
Expert
posted Hide Post
Ludo,

You can always use -IF &EFDECI.EXISTS THEN ......

T


In FOCUS
since 1986		WebFOCUS Server 8.2.01M, thru 8.2.07 on Windows Svr 2008 R2  
WebFOCUS App Studio 8.2.06 standalone on Windows 10 
 
Posts: 5694 | Location: United Kingdom | Registered: April 08, 2004Report This Post
jgelona
Master
posted Hide Post
If you are creating the file with WebFOCUS/FOCUS, you can test for the NODATA character string. For example:
TABLEF FILE xyz
PRINT FLD1 FLD2 FLD3 ... FLDX
ON TABLE SET NODATA NULL
ON TABLE SAVE
END
-RUN
-READ SAVE &FLD1.8 &FLD2.12 &FLD3.6...
-IF &FLD1 EQ NULL....


In FOCUS since 1985. Prod WF 8.0.08 (z90/Suse Linux) DB (Oracle 11g), Self Serv, Report Caster, WebServer Intel/Linux.
 
Posts: 975 | Location: Oklahoma City | Registered: October 27, 2006Report This Post
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