On Tue, Jul 9, 2019 at 5:23 PM Tom Mercha <merch...@hotmail.com> wrote:
> > 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 No, the language cannot override the SQL execution environment's limitations. "The code block is treated as though it were the body of a function with no parameters, returning void. It is parsed and executed a single time." The above applies regardless of the language the code block is written in. It can, however, affect permanent session state (so, use tables). David J.
