2010/12/30 gvim <gvimrc@xxxxxxxxx>
Is it possible, with PostgreSQL 9.0, to restrict access to specific table rows by `id`? I want a user to be able to INSERT new rows but not UPDATE or DELETE rows with `id` < 1616.
I believe that first you need to restrict SELECT. You can do it by creating view:
CREATE VIEW myview AS SELECT ... FROM mytable ... WHERE id < 1616;
Next, you need define rules on UPDATE and DELETE to the view, e.g:
CREATE RULE myview_rule_upd AS ON UPDATE TO myview
 DO INSTEAD
ÂÂÂ UPDATE mytable SET (column1, column2, ...) = (NEW.column1, NEW.column2, ... );
Â
CREATE RULE myview_rule_ins AS ON DELETE TO myview
 ...
For details please see "The rule system" chapter of documentation.
CREATE VIEW myview AS SELECT ... FROM mytable ... WHERE id < 1616;
Next, you need define rules on UPDATE and DELETE to the view, e.g:
CREATE RULE myview_rule_upd AS ON UPDATE TO myview
 DO INSTEAD
ÂÂÂ UPDATE mytable SET (column1, column2, ...) = (NEW.column1, NEW.column2, ... );
Â
CREATE RULE myview_rule_ins AS ON DELETE TO myview
 ...
For details please see "The rule system" chapter of documentation.
gvim
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// Dmitriy.
