Hello, 1) VPD: Virtual Private Database I would appreciate to have a new feature in PostgreSQL. This is an oracle-like feature that implement "Row Level Security". This feature may be emulated by using VIEW/RULE but this is very time consuming and error prone.
I would appreciated to have an estimated of the faisability and the cost to implement it. 2) Description The feature may be implemented with a simple expression associated to the table. ALTER TABLE table_name ADD FILTER filter_name CHECK(expression); ALTER TABLE table_name DROP FILTER filter_name; Usage/example: ALTER TABLE filtered_table ADD FILTER tf_username CHECK(filtered_table.creator=user) SELECT * FROM filtered_table; will really do SELECT * FROM filtered_table WHERE filtered_table.creator=user; Same thing for INSERT, UDPATE, and DELETE UPDATE filtered_table SET b_column=1 WHERE a_column='a'; wille really do UPDATE filtered_table SET b_column=1 WHERE a_column='a' and filtered_table.creator=user; In practice, the devs will create few function: my_login, my_logout, my_filter and the simple "filtered_table.creator=user" will be replace by ACL encapsulated in the function my_filter and add a triger to check data on INSERT, UDPATE. We could use veil to build a very efficient filter. 3) Question - Is it doable ? - Is it the sound way of doing it ? - Is it possible to have it in core ? - Is there a pgsql dev interested to implemented it ? - Is there other people interested in such feature ? - How much this will cost ? - With which delay ? Cordialement, Jean-Gérard Pailloncy -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
