The attached patch is a preparation to rework implementation of DROP statement using a common code. That intends to apply get_object_address() to resolve name of objects to be removed, and eventually minimizes the number of places to put permission checks.
Its first step is an enhancement of get_object_address; to accept 'missing_ok' argument to handle cases when IF EXISTS clause is supplied. If 'missing_ok' was true and the supplied name was not found, the patched get_object_address() returns an ObjectAddress with InvalidOid as objectId. If 'missing_ok' was false, its behavior is not changed. Thanks, -- KaiGai Kohei <kai...@kaigai.gr.jp>
pgsql-v9.2-drop-reworks-part-0.1.patch
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