Re: WHERE col = ANY($1) extended to 2 or more columns?

> On 9 Feb 2023, at 16:41, Dominique Devienne <ddevienne(at)gmail(dot)com> wrote:
>
> Hi. We are implementing an API which takes a list of row keys, and must return info about those rows. To implement that efficiently, in as few round-trips as possible, we bind a (binary) array of keys (ints, uuids, or strings) and that works great, but only if the key is a scalar one.
>
> Now we'd like to do the same for composite keys, and I don't know how to do that.
> Is it possible? Could someone please help out or demo such a thing?
> We are doing it in C++ using libpq, but a pure SQL or PL/pgSQL demo would still help (I think).

This works:

=> select (1, 'one'::text) in ((1, 'two'::text), (2, 'one'::text), (1, 'one'::text), (2, 'two'::text));
?column?
----------
t
(1 row)

Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.