Interested to Buy Any Domain ? << Click Here >> for more details...
When we enable pushdown optimization technique, two options
will be enabled (use view,..). Can anyone tell me how these
two options will work ?
When do we need to go for pushdown optimization technique ?
- 3 Answers
- 17398 Views
- IBM, I also Faced
- E-Mail Answers
Answer Posted / priyank
Hi,
For Pushdown optimization, we use
1. Temporary View for the below scenarios:
a. When the SQ or look up t/f contain a SQL override.
b. When the look up t/f is used with Filter t/f.
c. When an unconnected look up is used.
2. Temporary Sequence is used for the below scenario:
a. When a Sequence generator t.f is used in the mapping.
When Source side PDO is selected, the IS traverses from
Source side to the Target side till it comes across a
transformation whose logic cannot be pushed to the
database. If the logic for all the transformations can be
pushed to the database, still the target update override
query will be executed on the target database as logic of
transformations are pushed to the database whcih includes
the SQ query.
As per me, the push down optimizations are mainly used for
performance enhancement of the workflows as there are some
logics which can be exected faster on the database compared
to Informatica.
Please let me know all your comments if any on the above.
| Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
Whats there in global repository
What is joiner transformation?
What are mapplets? How is it different from a Reusable Transformation?
Hi Everybody, I have one fixed width file as source and 4 oracle tables (relational) as target. What are the Unit test cases i need to implement ? 1.Using TextPad software i tested postion of the field 2.As per specification i tested like whether it is correctly mapped or not? Is there any other test case do i need to implement. If possible can any one give me the test cases Advance Thanks
What is a sequence generator transformation?
What are the mapping parameters and mapping variables?
Explain in detail about scd type 1 through mapping.
Separate from a database, an information bazaar, and an information stockroom?
How can we improve session performance in aggregator transformation?
What is the function of union transformation?
What is status code in informatica?
What are the types of schemas we have in data warehouse.
How you prepared reports for OLAP?
difference between repository database and repository service?
Describe the scenarios where we go for joiner transformation instead of source qualifier transformation?
