How to extract all rows, for which row a particular criteria is met? Details in description - etl

Question

I am trying to load a set of policy numbers in my Target based on below criteria using Informatica PowerCenter.
I want to select all those rows of policy numbers, for which policy the Rider = 0
This is my source: -
Policy Rider Plan
1234 0 1000
1234 1 1010
1234 2 3000
9090 0 2000
9090 2 2545
4321 3 2000
4321 1 2000
Target should look like this: -
Policy Rider Plan
1234 0 1000
1234 1 1010
1234 2 3000
9090 0 2000
9090 2 2545
The policy number 4321 would not be loaded.
If I use filter as Rider = 0, then I miss out on below rows: -
1234 1 1010
1234 2 3000
9090 0 2000
9090 2 2545
What would be ideal way to load this kind of data using PowerCenter Designer?

Answer 1

Take the same source in one more qualifier in same mapping, use a filter as Rider=0 to get list of unique policy numbers that has Rider=0, then use a joiner with your regular source on policy number. This should work.
Another method, sort your data based on policy and Rider, and use variable ports with condition similar to below.
v_validflag=IIF(v_policy_prev!=policy, IIF(Rider=0, 'valid','invalid'), v_validflag)
v_policy_prev=policy
Then filter valid records.

Answer 2

There are many options. Here are two...
First:
It'll look like:
// AGGREGATOR \\
SOURCE >> SOURCE QUALIFIER >> SORTER << >> JOINER >> TARGET
\\============//
Connect all ports from Source Qualifier (SQ) to SORTER transformation (or sort in SQ itself) and define sorting Key for ‘Policy’ and ‘Rider’. After that split stream into two pipelines:
- Connect ‘Policy’ and ‘Rider’ to FILTER transformation and filter records by ‘Rider’ = 0. - After that link ‘Policy’ (only) to AGGREGATOR and set Group By to ‘YES’ for ‘Policy’. - Add a new port with FIRST or MAX function for ‘Policy’ port. This is to remove duplicate ‘Policy’-es.- Indicate ‘Sorted Input’ in the AGGREGATOR properties.- After that link ‘Policy’ from AGR to JOINER as Master in Port tab.
2.- Second stream, from SORTER, directly link to above JOINER (with aggregated ‘Policy’) as Detail. - Indicate ‘Sorted Input’ in the JOINER properties. - Set Join Type as ‘Normal Join’ and Join Condition as POLICY(master)=POLICY(detail) in JOINER properties.
... Target
Second option:
Just Override SQL in Source Qualifier...
WITH PLC as (
select POLICY
from SRC_TBL
where RIDER=0)
select s.POLICY, s.RIDER, s.PLAN
from PLC p left JOIN SRC_TBL s on s.POLICY = p.POLICY;
may vary depend on your source table constructions...