1.why we need to use unconnected transformation?
2.where we can static chach,dynamic chach
Answers were Sorted based on User's Feedback
Answer / rahul
In Lookup transformation;
Unconencted is used when ever u want to call the same
transformation several times and u have one return port.
Use dynamic cache if u want to update the case while
updating the target table itself and static is untouched
with the cache.
| Is This Answer Correct ? | 6 Yes | 1 No |
Answer / sreenu
Unconnected lkp is used for the performance preps bcz hear
we can return only one port and also it is not participated
in mapping directly in ulkp we can use only static cache.
Static cache: static cache is used in unconnected lkp, once
the data is cached it won’t modified.
Dynamic cache: in connected lkp we can use dynamic lkp. By
the use of dynamic lkp we can capture the changed
data.becage dynamic cache is automatically update the
cached data
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / satyam
We use an unconnected transformation when we need one
return column from each row and it receives values from:
LKP expression from another transformation.
| Is This Answer Correct ? | 1 Yes | 0 No |
we have 20 records in source system, when we run for the 1st time, it should load only 10 records into the target, when you run for the second time it should load another 10 record which are not loaded. How do we do that? Can we write a SQL query in source qualifier to do it. This q' is asked in one f the interviews. Please let me know if anyone knows. Thanks
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