Maciej Sieczka wrote:
I need to modify this default PostgreSQL's behaviour, so that the ACL on
a new table in this schema is set to SELECT, INSERT, UPDATE, DELETE,
REFERENCES for "editors", and SELECT for "viewers", without having to
manually GRANT rights each time a new table is created. I can't control
this setting from the client software as these are various programs, and
even if I could it'd be still better anyway to have it controlled in one
single place on the server side. But how?
From reading so far I *suppose* I should create a function which calls
an appropriate GRANT, and trigger it when a new record is added to
"pg_class". Is this doable?
Afraid not. You can't add a trigger to a system table.
The only real solution is to have your own function do both - create the
table and then grant relevant permissions. Only allow client
applications permissions to execute the function, not create tables
directly.
An extra, but desired functionality, would be if I could also prevent
other "editors" from modifying the table *if* it is being currently
being edited by somebody. Is that feasible at all?
Sure, just issue LOCK TABLE ... at the start of the transaction.
--
Richard Huxton
Archonet Ltd
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