Re: Function Inheritance?

Mark Butler <butlerm(at)middle(dot)net> writes:
> In http://www.postgresql.org/devel-corner/docs/postgres/sql-createtable.html
> "Postgres automatically allows the created table to inherit functions on
> tables above it in the inheritance hierarchy."

> "Postgres automatically allows the created table to inherit functions on
> tables above it in the inheritance hierarchy. Inheritance of functions is done
> according to the conventions of the Common Lisp Object System (CLOS)."

> Neither of these statements is true, right?

It still works.

regression=# create table foo (f1 int);
CREATE
regression=# create function getf1(foo) returns int as 'select $1.f1'
regression-# language 'sql';
CREATE
regression=# insert into foo values (42);
INSERT 149940 1
regression=# select getf1(foo) from foo;
getf1
-------
42
(1 row)

regression=# create table foot (g1 int) inherits (foo);
CREATE
regression=# insert into foot values (22,33);
INSERT 149954 1
regression=# select getf1(foot) from foot;
getf1
-------
22
(1 row)

We may have to break this at some point in pursuit of SQL-mandated
features, but it's not dead yet ...

regards, tom lane