Hi,
Assuming that CUS_MSTR.CUS_CIF_NBR is mandatory, your query can be re-written as follows:
select CUS_MSTR.*
from CUS_MSTR
left outer join EXCLU_CUS
on CUS_MSTR.CUS_CIF_NBR = EXCLU_CUS.CUS_CIF_NBR
and EXCLU_CUS.RULE_ID = 'RULE01'
where EXCLU_CUS.CUS_CIF_NBR is null
This can now be implemented in IS. However, depending on how IS handles the 'RULE01' condition in the ON clause, you may need to implement this view in 2 stages:
1) view1: select CUS_CIF_NBR from EXCLU_CUS where RULE_ID = 'RULE01'
2) view2: select CUS_MSTR.* from CUS_MSTR left outer join view1 on CUS_MSTR.CUS_CIF_NBR = view1.CUS_CIF_NBR where view1.CUS_CIF_NBR is null.
If CUS_MSTR.CUS_CIF_NBR is optional, you would need to adjust the SQL slightly to exclude records where CUS_MSTR.CUS_CIF_NBR is null.
Alternatively, if permitted in your environment, you could just create your required view in the underlying database and import this into IS.
Regards
Nigel