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Database Question

Posted on 2011-03-01
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Hi,

Suppose user A, who has all authorizations on a relation r, grants select on relation r to public with grant option. Suppose user B then grants select on r to A. Does this cause a cycle in the authorization graph.
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Question by:new_perl_user
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sdstuber earned 500 total points
ID: 35008438
A will have 2 or 3 grants on the same object or role, and there is no conflict there

the original "all authorizations"
the public grant
the specific grant from B

if the original "all" are direct grants then the grant from B will have no net effect,
so only 2 grants total on r

if the original "all" were through a role, then  A will have 3 grants on r

againl in either case, no conflict


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