Hi. I'm using binary binds and results for DMLs, as well as for COPY. So far, I've stayed within built-in scalar and array types, thus I could hardcode the OIDs of values "in the type-system" (in C++, via traits). But I'd like to venture into extension (e.g. hstore) and custom (enums, domain, etc...) types. Thus I'm wondering: 1) whether "official" extensions have fixed/stable OIDs, like in my hstore example. If so, where are they defined? 2) how should I be looking up OIDs for custom (or extension?) types with libpq? Any specific APIs? Or I need to do SQL instead? 3) If I duplicate custom types per-schema, to keep them standalone, they'll get different OIDs, right? Thanks for any insights on the above. --DD
