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).
Thanks, --DD