Sql-OWB conversion

Question

Hi All
I have an SQL here which I need to try convert into OWB mapping. Suppose I have a table Sequences which has Route code, planned route sequence to be followed and actual route sequence followed as follows
ROUTE     PLANNED     ACTUAL
A     1     1
A     2     3
A      3     2
A      4     4
A     5 5
Now from above table,I need to calculate the number of deviations in the sequence planned. In above case we can see one deviation between 3 and 2
My SQL is
select S3.Route,
(Select count(1)
from Sequences S1
where S1.Actual <> (
select min(actual)
from sequences S2
where S2.planned >= S1.planned
and s2. Route = S3. Route
and S1. Route = S3. Route)
) Deviations,
(Select count(1)
from Sequences S1
where S1.Actual = (
select min(actual)
from sequences S2
where S2.planned >= S1.planned
and s2. Route = S3. Route
and S1. Route = S3. Route)
) Successes
from Sequences S3
group by S3. Route
so my output is
Route Deviations Successess
A     1     4
I want to do the same in OWB. Any ideas please?
Birdy

Answer 1

Doing the same as the query posted, you can do this to calculate deviations:
1 - Add 3 times the sequences table to the mapping (s1, s2 and s3).
2 - Join the the tables using the joiner operator with the conditions:
S2.planned >= S1.planned
and s2. Route = S3. Route
and S1. Route = S3. Route
3 - Add an aggregation operator to get the min(actual)
4 - Add another joiner operator and join s1 with the result of the previous aggregator:
S1.Actual = min(actual)
5 - Add another aggregator and get count(1)
After getting the correct result, you can optimize the mapping or try to make it simple.