On Fri, Dec 08, 2023 at 03:42:06PM +0900, Masahiko Sawada 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).
Yeah, I was wondering if there was a trick to avoid the input internal argument conflict, but cannot recall something elegant on the top of my mind. Anyway, I'd be OK with any approach as long as it plays nicely with the query integration, and that's FORMAT's DefElem with its string value to do the function lookups. -- Michael
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