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[CLOSED] db_lookup
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Noel
Silver Member
posted
is it possible to do a db_lookup in a hold file?

This message has been edited. Last edited by: Kerry,


WebFocus 762 AS400 / DB2
 
Posts: 34 | Location: Winnipeg, MB | Registered: January 23, 2008Report This Post
Francis Mariani
Expert
posted Hide Post
quote:
There are no restrictions on the source file. The lookup file can be any non-FOCUS data source that is supported as the cross referenced file in a cluster join. The lookup fields used to find the matching record are subject to the rules regarding cross-referenced join fields for the lookup data source. A fixed format sequential file can be the lookup file if it is sorted in the same order as the source file.
- Documentation.


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
Noel
Silver Member
posted Hide Post
Hi Francis,

What if the db_lookup is in the DEFINE or COMPUTE? Will it work?

Thanks,
noel


WebFocus 762 AS400 / DB2
 
Posts: 34 | Location: Winnipeg, MB | Registered: January 23, 2008Report This Post
Francis Mariani
Expert
posted Hide Post
You really must read the documentation:

quote:
DB_LOOKUP can be called in a DEFINE command, TABLE COMPUTE command, MODIFY COMPUTE command, or DataMigrator flow.


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
GamP
Virtuoso
posted Hide Post
It's always easier to ask someone who knows.... Wink


GamP
- Using AS 8.2.01 on Windows 10 - IE11.
in Focus since 1988
 
Posts: 1961 | Location: Netherlands | Registered: September 25, 2007Report This Post
Waz
Expert
posted Hide Post
quote:
There are no restrictions on the source file. The lookup file can be any non-FOCUS data source


I got caught on this, not reading the rest of the paragraph. Created a FOCUS file and caused the server to crash.


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
Gokul Raj
Member
posted Hide Post
i've used db_lookup in DEFINE field of a HOLD file.
the Looked-up table is from the database.
its working without crashing the server.


-Gokul,
WebFOCUS 769, 773, Windows XP, 7.
 
Posts: 9 | Location: India | Registered: October 07, 2009Report This Post
M Meagher
Gold member
posted Hide Post
Just to clarify ... The file you are defining is the HOLD file. The table you are using for the DB_LOOKUP can be a SQL Server table.

 
TABLE FILE PASSED_BINNED
SUM
  PASSED
     TAGS
     PASSED_TAGS
     DETECTED_TAGS
     PPT_TAGS_REMAINING
BY SPECIES_RELEASE
BY RELEASE
BY REL_RELEASEDATETIME AS 'RELEASEDATETIME'
BY YEAR
BY SYSTEM
BY LD_TYPE
BY UNIT
BY JULDAY
BY HOUR
BY QUARTER_HOUR
BY HOURS
ON TABLE HOLD AS ALMOST_THERE
END
-RUN
DEFINE FILE ALMOST_THERE
  FLOW/D14.6 MISSING ON = DB_LOOKUP(OPS_HOLD_ALL,YEAR,OPS_YEAR,SYSTEM,OPS_SYSTEM,LD_TYPE,OPS_TYPE,UNIT,OPS_UNIT,JULDAY,OPS_JULDAY,HOUR,OPS_HOUR,QUARTER_HOUR,OPS_QUARTER_HOUR,OPS_VALUE );
...


The closer you can match the sort order (or index) of the two tables, the better. OPS_HOLD_ALL is a SQL Server table with dam flows taken every fifteen minutes for six years and FLOWs are returned with no noticeable lag.
 
Posts: 60 | Location: Ellensburg Washington | Registered: May 22, 2009Report This Post
Clif
Guru
posted Hide Post
One more thing. In Release 7.7 you can enable a cache for DB_LOOKUP. If you are looking up the same values repeatededly this can improve throughput.


N/A
 
Posts: 397 | Location: New York City | Registered: May 03, 2007Report This Post
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