Re: plpgsql - DECLARE - cannot to use %TYPE or %ROWTYPE for composite types

2016-01-18 22:21 GMT+01:00 Robert Haas <robertmhaas(at)gmail(dot)com>:

> On Mon, Jan 18, 2016 at 3:51 PM, Alvaro Herrera
> <alvherre(at)2ndquadrant(dot)com> wrote:
> > BTW are we all agreed that enabling
> > foo%ARRAYTYPE
> > and
> > foo%ELEMENTYPE
> > in plpgsql's DECLARE section is what we want for this?
>
> I know that Oracle uses syntax of this general type, but I've always
> found it ugly. It's also pretty non-extensible. You could want
> similar things for range types and any other container types we might
> get in the future, but clearly adding new reserved words for each one
> is no good.
>

It doesn't use reserved worlds.

>
> One idea that occurs to me is: If you can DECLARE BAR FOO%TYPE, but
> then you want to make BAR an array of that type rather than a scalar,
> why not write that as DECLARE BAR FOO%TYPE[]? That seems quite
> natural to me.
>

what you propose for syntax for taking a element of array?

>
> I think the part of this patch that makes %TYPE work for more kinds of
> types is probably a good idea, although I haven't carefully studied
> exactly what it does.
>

I invite any ideas, but currently used notation is only in direction
type->array. The working with symbols looks more difficult, than using
words (in design area).

More - the textual form is more near to our system of polymorphics types:
anyelement, anyarray, ... We have not anyelement[]

Regards

Pavel

>
> --
> Robert Haas
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