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Security with BW generated hana views in NW 7.5 on HANA

Hello All, Upon activating Hana composite provider in NW7.5 we have now generated hana view. We are told that only way to read data or give access to dev/users to these generated views is by maintaining DBMS user in user profile. Is this true and only way to do so. Because after doing this we were able to add entry for HCOP and user in bw table RS2HANA_AUTH_STR and hana role was added to hana user as well and then we were able to preview data from this bw generated hana view. In that background i have couple of questions

Question 1 : In order to properly access hana generated views? Is DBMS user maintenance must in user profile (su01)? if DBMS maintenance is must then how to update DBMS tab in user profile for more than one existing users at same time?

Question 2 : RS2HANA_AUTH_RUN is used to update entry in RS2HANA_AUTH_STR. Without entry they cannot access data from these generated hana view. is this the only way to implement security for such generated hana views?

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