GeekInterview.com
   Home |  Tech FAQ  |   Interview Questions |  Placement Papers |  Tech Articles |  Learn |  Freelance Projects |  Online Testing |  Geeks Talk |  Job Postings |  Knowledge Base | Site Search |  Add/Ask Question

  GeekInterview.com  >  Interview Questions  >  Data Warehousing  >  Informatica

 Print  |  
Question:  Unconnected Lookup

Answer: In which situation do we use unconnected lookup?


June 06, 2009 02:34:11 #3
 pooja.verma   Member Since: June 2009    Total Comments: 2 

RE: Unconnected Lookup
 
Unconnected lookup should be used when we need to call same lookup multiple times in one mapping. For example, in a parent child relationship you need to pass mutiple child id's to get respective parent id's.

One can argue that this can be achieved by creating resusable lookup as well. Thats true, but reusable components are created when the need is across mappings and not one mapping. Also, if we use connected lookup multiple times in a mapping, by default the cache would be persistent.
     

 

Back To Question