Answer / srinath.p

Push down Optimization is the great option provided by
informatica powercenter. this senario is used in both source
and targets are databases

Answer / jaspreet banga

One can push transformation logic to the source or target
database using pushdown optimization. The Integration
Service translates the transformation logic into SQL
queries and sends the SQL queries to the source or the
target database which executes the SQL queries to process
the transformations. The amount of transformation logic one
can push to the database depends on the database,
transformation logic, and mapping and session
configuration. The Integration Service analyzes the
transformation logic it can push to the database and
executes the SQL statement generated against the source or
target tables, and it processes any transformation logic
that it cannot push to the database.

just consider the example:----

Suppose a mapping contains a Filter transformation that
filters out all employees except those with a DEPTNO
greater than 40. The Integration Service can push the
transformation logic to the database. It generates the
following SQL statement to process the transformation logic:

INSERT INTO EMP_TGT(EMPNO, ENAME, SAL, COMM, DEPTNO)
SELECT
EMP_SRC.EMPNO,
EMP_SRC.ENAME,
EMP_SRC.SAL,
EMP_SRC.COMM,
EMP_SRC.DEPTNO
FROM EMP_SRC
WHERE (EMP_SRC.DEPTNO >40)
The Integration Service generates an INSERT SELECT
statement and it filters the data using a WHERE clause. The
Integration Service does not extract data from the database
at this time

what is mapping override?

2 Answers   Cap Gemini,

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If we have 1000 rows were loaded in to datawarehouse and next day the source have 1010 rows so, how can we loaded only updated rows into target.

6 Answers   Accenture,

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Hi I have been asked several times the following questions. 1.How does one do incremnental loading 2.Scenario - You are trying to load reasonable amount of rows into the target table, and its taking a helluva lot of time.What could be the reasons? I hate to answer these tw0 , gives me nightmares to even think of it!!! 3.Tell me any complex situation you have faced( as an Informatica Developer) and how did you resolve it. 4.tell me any complex mapping that you have done. All the experienced people out there , please please, reply to these questions.

2 Answers  

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my source is like this id,name sal 10 abc 1000,10 pqr 2000, 10 xyz 3000 ,10 jkl 4000 and my requirement is like this 10 abc,pqr,xyz,jkl 2000 .... i have try for this by using expression transformatin its ok of the concatenation of second column but the thing is that on third column if u group by using agg t/r the last value will com i.e 4000 but i asked by a interviewer that i dont want the first or last column i want the middle column i.e 2000 .plz reply for the same

2 Answers   KPIT,

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Explain the difference between mapping parameter and mapping variable?

0 Answers  

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if we have input eno 1,2,3,1,2,3 year 2001,2002,2003,2001,2002,2003 and sal 10000,20000,30000,20000,30000,40000 ex-output eno totsal 1 30000 2 50000 3 70000

7 Answers  

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Hi, I am unable to connect ports from two Active trasformations to another active transformation ? Why is it so? Why it is designed like that? Some rules has been designed like this that is We can't connect passive and another passive to active.Can any one please letme know all these rules. Ex:- I am trying to connect filter1 and filter2 to another filter. Please answer me Advance Thanks

1 Answers   IBM,

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How will you update the row without using update statergy?

10 Answers   CTS,

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What is parameter file?

2 Answers  

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Explain how many types of dimensions are available in informatica?

0 Answers  

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How can we trouble shoot the commas in a column of a comma delimited flat file in Informatica

1 Answers  

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Define filter transformation?

0 Answers  

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