Answer / mahaboob basha

Hi,
the only condition for a transformation to bcum active is
row number changes.
Now the thing is how a row number can change. Then there are
2 conditions:
1. either the no of rows coming in and going out is diff.
eg: in case of filter we have the data like
id name dept row_num
1 aa 4 1
2 bb 3 2
3 cc 4 3
and we have a filter condition like dept=4 then the o/p wld
b like

id name dept row_num
1 aa 4 1
3 cc 4 2

So row num changed and it is an active transformation



2. or the order of the row changes
eg: when Union transformation pulls in data, suppose we have
2 sources
sources1:
id name dept row_num
1 aa 4 1
2 bb 3 2
3 cc 4 3
source2:
id name dept row_num
4 aaa 4 4
5 bbb 3 5
6 ccc 4 6

it never restricts the data from any source so the data can
come in any manner

id name dept row_num old row_num
1 aa 4 1 1
4 aaa 4 2 4
5 bbb 3 3 5
2 bb 3 4 2
3 cc 4 5 3
6 ccc 4 6 6

so the row_num are changing . Thus we say that union is an
active transformation

Answer / rock

Since union is derived from Custom T/R which is of type Active.

Answer / raji

Hai frnds,
According to my knoweledge,active t/f means which changes the number of rows that can pass through it.
coming to why union t/s is active.......because union t/f merges the data which is coming from two sources,it means that it summarizes the data which is passing through union t/f,with this the no.of rows coming from that will be less....
so it is an active t/f...

Thanks.....Raji

Answer / hanumantharao

Active transformation means recieve n number of records and
return < or > that of n number of records.
Union transformation is Active transformation because it
return less than that of recieved records.

Answer / venkateshmalneni

If the source1 has 10 records and the it contains 3 records
and the same 3 records are in the second source,the second
source contains 10 records if we want to join them using union
t/r then the output is 17 records instead of 20 records.
thats why we say that UNION T/R is active t/r

Answer / sony

actually union transformation is a passive
transformation,not an active transformation.

what is the difference between Informatica7.1 & informatica 8.1

4 Answers  

What are the uses of etl tools?

0 Answers  

You have defined the following: - Commit Type = 'Target' - Commit Interval = 10000 - writer buffer block can hold multiple 7,500 rows - you are loading 40,000 records into the target After how many records will the Informatica Server issue commit commands? a)7500, 15000, 22500, 30000, 40000 b)15000, 22500, 30000, 37500, 40000 c)15000, 22500, 30000, 40000 d)15000, 30000, 40000

7 Answers   Deloitte,

Tell me about Propagate functions in informatica

0 Answers  

Have you worked with/created Parameter file

0 Answers  

Which will beter perform IIf or decode?

3 Answers   TCS,

What is factless fact schema?

1 Answers  

tell me the push down optimization

2 Answers   Wipro,

What is partioning?how many types of partinings are there

2 Answers   HCL,

What is use of batch file in informatica? How many types of batch file in informatica?

2 Answers   EXL,

What is the difference between sequential batch and concurrent batch and which is recommended and why?

1 Answers  

How to Migrate the UNIX SCRIPTS from SIT TO PROD?

1 Answers