Splitter Operator Help

So a bit new at this, and struggling mightily - any help or insight would be very much appreciated as I have read around the forums, google and have found nothing.
I have two tables
TAB1
TAB2
I used a joiner on these two tables
INGRP1.METHOD = INGRP2.ENRL_METHOD_CODE (left outer join)
I then take the output of these two tables and put them through a splitter
I have in the splitter
INSERT group with the condition: INGRP1.METHOD != INGRP1.ENRL_METHOD_CODE
and an
UPDATE group with the condition: INGRP1.DESCRIPTION != INGRP1.ENRL_METHOD_DESC
I want to join these two tables, and then take the output and either
Insert back into TAB2 if the column METHOD has changed between TAB1 and TAB2
OR
Update TAB2 if the DESCRIPTION has changed
Whats happening right now
1) Everytime I run the mapping I am getting unique constraint violated on ENRL_METHOD_CODE
2) There is always an update
Its almost like the splitter is totally ignoring my conditions!!!
Is my logic flawed? This is driving me nuts as this should be a SIMPLE mapping!
Please any help would be much appreciated!!!!

Hi chillychin,
I think the problem is NULL is always false when compared to something, and I'm guessing there's some misspelling in your splitter conditions.
You have an outer join with TAB2, so when they are equal, is not going to INSERT because TAB1.METHOD = TAB2.ENRL_METHOD_CODE, it will evaluate the second group in the splitter.
When there is not correspondence, TAB2.ENRL_METHOD_CODE is null, so is not going to insert either, because TAB1.METHOD != TAB2.ENRL_METHOD_CODE is also false when evaluated.
Check your splitter conditions and keep in mind with an outer join you are comparing to null columns, so you have to make conditions apart for NULL columns, they are either not equal and not distinct.
Regards
ANA GH

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