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d694bdd1c9
This is needed to allow a security-definer function to set a truly secure value of search_path. Without it, a malicious user can use temporary objects to execute code with the privileges of the security-definer function. Even pushing the temp schema to the back of the search path is not quite good enough, because a function or operator at the back of the path might still capture control from one nearer the front due to having a more exact datatype match. Hence, disable searching the temp schema altogether for functions and operators. Security: CVE-2007-2138