On Mon, 2009-10-05 at 16:27 +0900, KaiGai Kohei wrote: > CREATE TABLE tbl_p (int a, int b); > CREATE TABLE tbl_c (int x) INHERITS(tbl_p); > > SELECT a,b FROM tbl_p; --> It selects data from only tbl_p. > It is reasonable to bypass checks on tbl_c. > SELECT b,x FROM tbl_c; --> It selects data from tbl_p and tbl_c concurrently, > if we consider the inherited columns are a part of > the parent table.
I think you need to distinguish between the definition of columns and the data in the columns. tbl_c has inherited the definition of the columns from tbl_p, but the data is part of tbl_c, not tbl_p. So there is not reason for this second query to ask tbl_p for permission, because it does not touch data in tbl_p at all. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
