when will we go for unconnected lookup transformation in
Informatica?
Answers were Sorted based on User's Feedback
Answer / suneelkumar.dasari
If u want to use the same look up T/R more than one time,you should use compulsory Unconnected lookup.A common use for unconnected Lookup transformations is to update slowly changing dimension tables.I know these 2 uses.
| Is This Answer Correct ? | 15 Yes | 0 No |
Answer / balu
above cases as well as if you want to get single port from
the lookup table then you should go for unconnected lookup
transformation.
| Is This Answer Correct ? | 7 Yes | 0 No |
Answer / g. manthiramoorthy
1. Calling the same lookup multiple times in one mapping
2. Testing the results of a lookup in an expression
3. Filtering rows based on the lookup results
4. Marking rows for update based on the result of a lookup,
such as updating slowly changing dimension tables
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / naresh
If we want to use multiple times in same mapping you can go
for un-connected lookup and It depends on how much data
your processing.
performance wise unconnected lookup is better because its
like reusable one and it will lookup the values only the
condition meet the criteria.
1. It will return only one value
2. It will act as static cache
| Is This Answer Correct ? | 3 Yes | 0 No |
Answer / kamesh
The main advantage of using an unconnected lookup is the fact that you can use it in an expression/any other transformation like a “function” in other programming languages. The Lookup Cache is calculated only once as part of the session initialization and hence more efficient, since all subsequent look-ups will re-use the Cache.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / nag
To retrieve the data dynamically. And it is used for other
transformations in the same mapping.
| Is This Answer Correct ? | 1 Yes | 12 No |
Is informatica power center designer has 64 bit support?
Explain is there any way to read the ms excel datas directly into informatica? Like is there any possibilities to take excel file as target?
What all are steps in up gradation of Informatica server?
Filter condition at workflow level & filter condition at mapping level . Which will get preference or which will work.
what is the incremental agrrigation?
WHAT IS USE OF SQL OVERRIDE IN SOURCE QUALIFIER? chandumba2005@gmai.com
What is meant by lookup transformation? Explain the types of lookup transformation?
As a support project team member, how will you get the questions regarding errors from client or customers (in which format)?
explain about session partitions ?
how to use incremental load?
If u r using dynamic cache lookup port will be thier in thet which option u will select
how the informatica server sorts the strings values in rank transformations?