Hi, In <CAD21AoDkoGL6yJ_HjNOg9cU=aadw8uq3rsqoers0sx85lpp...@mail.gmail.com> "Re: Make COPY format extendable: Extract COPY TO format implementations" on Fri, 8 Dec 2023 15:42:06 +0900, Masahiko Sawada <sawada.m...@gmail.com> wrote:
> So a custom COPY extension would not be able to define SQL functions > just like arrow(internal) for example. We might need to define a rule > like the function returning copy_in/out_handler must be defined as > <method name>_to(internal) and <method_name>_from(internal). We may not need to add "_to"/"_from" suffix by checking both of argument type and return type. Because we use different return type for copy_in/out_handler. But the current LookupFuncName() family doesn't check return type. If we use this approach, we need to improve the current LookupFuncName() family too. Thanks, -- kou
