How to define the order of GROUPBYs, JOINs and FILTERS in an interface?

Question

Hello,
I would like to define an interface which implements the following logic:
Give me a list of all customers with less then 2 orders in status = 'A'.
SELECT C.Name, o.cnt
FROM CUSTOMER C
LEFT OUTER JOIN (SELECT cust_id, count(*) cnt FROM ORDERS WHERE status = 'A' GROUP BY cust_id) O
ON C.cust_id = O.cust_id
WHERE O.cnt < 2 OR O.cust_id IS NULL
In this case, the right order of operations is essential:
First apply filter, then group, then join, then apply the second filter.
How can I define this in an ODI interface?
Thanks in advance for any hints...
Best regards,
Karol

Answer 1

Defining JOINs order :
1 - Go in topology manager and verify that your technologie support the ISO ordered join ( left inner join ...)
NB : by default Oracle data sources are configured with the old syntax ( ie : columns(+)=expr )
- Open technology Oracle: Check SQL ISO
- Go to the SQL tab
- select "FROM" in the filter place
- verify the join syntax
2 - Define the alias order in the source table
3 - Check the ordered join (ISO) and a num-order on the join operator
Defining GROUPBYs and FILTERS orders seems to be impossible
but you can create a mapping as a view and use this mapping as a source in an other one !