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Focal Point    Focal Point Forums  Hop To Forum Categories  WebFOCUS/FOCUS Forum on Focal Point     [SOLVED] Evaluate COMPUTE expression

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[SOLVED] Evaluate COMPUTE expression
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Carlos Dias
Platinum Member
posted
Hello,
I'm trying to find a way to get the columns fields that a COMPUTE expression contains.
Something like:
COMPUTE XPTO/A30 = COL1+COL2+COL3;

I thought in using the WF parsing functions to get the columns. But is very difficult to parse complex expression.

The other option was something like:
TABLE FILE filename
PRINT COMPUTE XPTO/A30 = COL1+COL2+COL3;
ON TABLE HOLD AS RES
END

CHECK FILE RES HOLD AS MYCHECK
TABLE FILE MYCHECK
PRINT *
END

This way I get the COL1, COL2 and COL3. The point is that I need to execute the query. In may case this is not an option.
So my question is: It's possible to get this information without executing the query?

Or maybe there is another way to solve this issue.

Thanks in advanced,
Carlos Dias

This message has been edited. Last edited by: Carlos Dias,


WebFOCUS version: 7.6
Linux/Windows
HTML, Excel
 
Posts: 127 | Location: Aveiro, Portugal | Registered: February 04, 2011Report This Post
Waz
Expert
posted Hide Post
Why do you want to eval COMPUTES ?

Is there a reason or problem ?


Waz...

Prod:WebFOCUS 7.6.10/8.1.04Upgrade:WebFOCUS 8.2.07OS:LinuxOutputs:HTML, PDF, Excel, PPT
In Focus since 1984
Pity the lost knowledge of an old programmer!

 
Posts: 6347 | Location: 33°49'23.0"S, 151°11'41.0"E | Registered: October 31, 2006Report This Post
Carlos Dias
Platinum Member
posted Hide Post
There is no problem at all... I just want to get the columns of the COMPUTE to make another operations.

I can get this running the query. But the best was to create the HOLD to get the master file without running the query. It's possible? Why is necessary to execute the query to get the master file created by the HOLD? The data is not necessary.

Thanks,
Carlos Dias


WebFOCUS version: 7.6
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Posts: 127 | Location: Aveiro, Portugal | Registered: February 04, 2011Report This Post
FrankDutch
Virtuoso
posted Hide Post
Should the result of the expression be an a30 field?
But maybe I lust do not understand the question.




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
Francis Mariani
Expert
posted Hide Post
Carlos,

To get a Master for a HOLD file without accessing the data, add this code before the TABLE FILE command:

SET XRETRIEVAL=OFF
Change it to ON when you want to access data (or delete the command).

You are using + signs in your COMPUTE statement, we assume the columns COL1, COL2 and COL3 are numeric. If so, XPTO must be numeric. If COL1, COL2 and COL3 are alphanumeric, you need to concatenate the columns:

COMPUTE XPTO/A30 = COL1 | COL2 | COL3;
COMPUTE XPTO/A30 = COL1 || COL2 || COL3;


| - Weak concatenation - Preserves trailing blanks.

|| - Strong concatenation - Moves trailing blanks to the end of a concatenated string.


Francis


Give me code, or give me retirement. In FOCUS since 1991

Production: WF 7.7.05M, Dev Studio, BID, MRE, WebSphere, DB2 / Test: WF 8.1.05M, App Studio, BI Portal, Report Caster, jQuery, HighCharts, Apache Tomcat, MS SQL Server
 
Posts: 10577 | Location: Toronto, Ontario, Canada | Registered: April 27, 2005Report This Post
Carlos Dias
Platinum Member
posted Hide Post
The XRETRIEVAL works.

In the example XPTO in not a alphanumeric, but a number.

Thank you.


WebFOCUS version: 7.6
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HTML, Excel
 
Posts: 127 | Location: Aveiro, Portugal | Registered: February 04, 2011Report This Post
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