On Sun, Aug 16, 2009 at 02:15:39AM +0300, Peter Eisentraut wrote:
> On 2009-08-15 at 23:31 +0100, Sam Mason wrote:
> > Next all you need is to be able to PREPARE them (and somehow access the
> > parameters from execute) and you'll have nice local functions. :)
>
> Yeah, rather than just making up some new command for "execute this
> string", this could be generalized as lambda expressions that could be
> called whereever an expression is allowed. E.g.
>
> SELECT LAMBDA $$ ... $$;
[..]
> SELECT (LAMBDA (x int, y text) $$ ... $$) (37, 'foo');
I can't quite tell if you're being serious or not, you realize that this
leaves open the possibility of doing:
SELECT t.n, f.op, f.fn(t.n) FROM generate_series(1,10) t(n), (VALUES ('id',LAMBDA (_x int) $$ BEGIN; RETURN _x;
END;$$), ('*2',LAMBDA (_x int) $$ BEGIN; RETURN _x*2; END; $$)) f(op,fn)
And of storing lambda abstractions in tables?
-- Sam http://samason.me.uk/
