Hello,
I am going through the ODI 12c Getting Started Demo Appliance.
I tried to create a similar mapping (Map TRG_CITY) to load data into TRG_CITY table. However, I am not able to set the Update Key blank. But, the demo mapping "Load TRG_CITY", has the update key blank.
Below is the demo mapping "Load TRG_CITY" where the update key is blank.

Below is my mapping, where I am not able to set the update key blank.

I have noticed, also, that the demo "Load TRG_CITY" mapping, allows to uncheck the TRG_CITY's key attribute.

However, in my mapping, I am not able to uncheck the CITY_ID key attribute as it's grayed-out.

Could someone please let me know how to set the update key blank? I am using the out of the box TRG_CITY datastore/table. And also, why I may not be able to un-check the CITY_ID key attribute?
Thanks in advance.
Regards,
Manoj.