Re: Extending PostgreSQL with a Domain-Specific Language (DSL) - Development

I understand that you never wrote any PL handler but was just thinking
about this functionality as a follow-up to our conversation. I was just
wondering whether anonymous DO blocks *must* return void or not?

The docs for DO say it is a function returning void -
https://www.postgresql.org/docs/current/sql-do.html

But the docs for CREATE LANGUAGE's INLINE HANDLER say 'typically return
void' - https://www.postgresql.org/docs/current/sql-createlanguage.html