Hi,
I will clarify some of the queries that you have posted-
1. The message that you receive saying view not supported for data provisioning is a message and not an error.
2. that is why it just means to add a view and since other provisioning options are not available for the view, you will notice that the view name appears in your LTRC screen for just few seconds and then vanishes. This is normal behavior.
3. If the tables on which the view is based, undergoes some changes, then those will not be reflected in your hana schema. If you want the new changes to be reflected, then you would have to issue the VIEW command again.
I too had some queries on this functionality and got above replies from the SAP support team.
The exact question of why this view functionality has been provided is open at my end too and am waiting for SAP team's reply on this.
Hope this clarifies your queries to some extent.
Will keep you posted on the updates from them.
Regards,
Saritha K