Tom Lane wrote:
> "Eugene E." <sad@bankir.ru> writes:
>
>>db=# REVOKE all ON t FROM u;
>>db=# GRANT update,insert,delete ON t TO u;
>>db=# \c - u
>
>
>>db=> INSERT INTO t VALUES (1,'x');
>>INSERT
>>db=> UPDATE t SET a='y' WHERE i=1;
>>ERROR: Permission denied for relation t;
>>db=> UPDATE t SET a='y';
>>UPDATE
>
>
> This behavior is correct and as documented in the UPDATE reference page:
Good
if you have a strange behavior - just document it. quite good.
> You must have the UPDATE privilege on the table to update it, as
> well as the SELECT privilege to any table whose values are read
> in the expressions or condition.
This means that some privileges are NOT INDEPENDENT.