Focal Point Banner


As of December 1, 2020, Focal Point is retired and repurposed as a reference repository. We value the wealth of knowledge that's been shared here over the years. You'll continue to have access to this treasure trove of knowledge, for search purposes only.

Join the TIBCO Community
TIBCO Community is a collaborative space for users to share knowledge and support one another in making the best use of TIBCO products and services. There are several TIBCO WebFOCUS resources in the community.

  • From the Home page, select Predict: WebFOCUS to view articles, questions, and trending articles.
  • Select Products from the top navigation bar, scroll, and then select the TIBCO WebFOCUS product page to view product overview, articles, and discussions.
  • Request access to the private WebFOCUS User Group (login required) to network with fellow members.

Former myibi community members should have received an email on 8/3/22 to activate their user accounts to join the community. Check your Spam folder for the email. Please get in touch with us at community@tibco.com for further assistance. Reference the community FAQ to learn more about the community.


Focal Point    Focal Point Forums  Hop To Forum Categories  iWay Software Product Forum on Focal Point    [SOLVED] How to handle NULL values returned by db_lookup function

Read-Only Read-Only Topic
Go
Search
Notify
Tools
[SOLVED] How to handle NULL values returned by db_lookup function
 Login/Join
 
lalvarez13
Member
posted
Hi.

We would like to know how to handle NULL values returned by the db_lookup function. We have the following expression, but we don't know if there's a polish way to do it:

 IF DB_LOOKUP( dim_producto, PROD_ID, PRODUCTO_ID_NK, PRODUCTO_SK ) GE 1 THEN DB_LOOKUP( dim_producto, PROD_ID, PRODUCTO_ID_NK, PRODUCTO_SK ) ELSE -1


Any suggestions?

Thanks in advance.

Regards,

Leonardo.

This message has been edited. Last edited by: Tamra,
 
Posts: 9 | Registered: February 09, 2016Report This Post
Dan Satchell
Virtuoso
posted Hide Post
From the Using Functions reference manual:

If the lookup field has the MISSING=ON attribute in its Master File and the DEFINE or
COMPUTE command specifies MISSING ON, the missing value is returned when the
lookup field is missing. Without MISSING ON in both places, the missing value is converted
to a default value (blank for an alphanumeric field, zero for a numeric field).


WebFOCUS 7.7.05
 
Posts: 1213 | Location: Seattle, Washington - USA | Registered: October 22, 2007Report This Post
lalvarez13
Member
posted Hide Post
Well, my question concerns when the db_lookup function returns NULL, how should I handle that NULL value (missing value)? I tried to find an NVL function or similar and I didn't. All our Oracle targets don't allow nulls, hence I shouldn't select MISSING option in the master.

Thanks.

Regards,

Leonardo.
 
Posts: 9 | Registered: February 09, 2016Report This Post
Clif
Guru
posted Hide Post
You can check for a NULL value with syntax like
IF DB_LOOKUP( ... ) IS MISSING THEN ...


N/A
 
Posts: 397 | Location: New York City | Registered: May 03, 2007Report This Post
Kevin W
Platinum Member
posted Hide Post
MISSING is the WebFocus keyword for NULL. But you have to explicitly look for it (MISSING=ON). Otherwise they kindly turn a NULL into a zero or a space. Dan gave you some key information for turning it on so you can use it. Clif told you how to use it.


WebFOCUS 7.7.05 (Someday 8)
Windows 7, All Outputs
In Focus since 1983.
 
Posts: 103 | Registered: April 27, 2011Report This Post
Dan Satchell
Virtuoso
posted Hide Post
If your Oracle targets don't allow nulls (and therefore MISSING isn't ON in the synonym), then the DB_LOOKUP function should return either a value, or a blank (if the field is alphanumeric and no match is found), or a zero (if the field is numeric and no match is found).

For alphanumeric field:
IF DB_LOOKUP(...) EQ '' THEN ....

For a numeric field:
IF DB_LOOKUP(...) EQ 0 THEN ....


WebFOCUS 7.7.05
 
Posts: 1213 | Location: Seattle, Washington - USA | Registered: October 22, 2007Report This Post
  Powered by Social Strata  

Read-Only Read-Only Topic

Focal Point    Focal Point Forums  Hop To Forum Categories  iWay Software Product Forum on Focal Point    [SOLVED] How to handle NULL values returned by db_lookup function

Copyright © 1996-2020 Information Builders