If you're only after whether the account privilege has been assigned an easier query would be to idmv_link_ext which has columns mcThisMSKEYVALUE and mcOtherMSKEYVALUE:
select mcThisMSKEYVALUE, mcOtherMSKEYVALUE from idmv_link_ext
where mcThisMSKEYVALUE = '[USER_NAME]' and mcOtherMSKEYVALUE like '%[REPOSITORY_NAME]%'