What Queries Access Matters
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### What Queries Access Matters

The executed queries, the ISOK_QUERIES.Querys, can be any SQL statement. Obviously, what executes matters. Less obviously, the ownership of and permissions granted on every object referenced by every query also matters.

Really, when multiple schemas are in the search_path, it is the ownership of and permissions granted on every object that might be referenced by every query that matters.

The ownership and permissions of referenced objects matter because these factors ultimately control what any given query actually does. If a user has, for example, permission to alter a view with some given name, or replace a table having that name with a view that has the same name, then the user can change what happens when that name is used in a query. The user can write a view that does anything. Or at least anything that the role which runs run_isok_queries() is allowed to do.

Imagine, the new view could call a function, say, in place of a table that was referenced, and that function could do anything at all. Even while still returning the replaced table's rows, so as to produce a results identical to that produced before the system was altered.

That is the issue. The user executing the saved query is dependent upon the goodwill of all the users who have enough access to alter any of the objects involved when the query is executed.

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