"DO UPDATE SET description=description;" I think that should be: "DO UPDATE SET description=excluded.description;" And doesn't it also need an inference clau

"DO UPDATE SET description=description;" I think that should be: "DO UPDATE SET description=excluded.description;" And doesn't it also need an inference clause or constraint specification for DO UPDATE? Please update example code to be self-contained, so that readers can copy/paste. The example itself -- upserting product descriptions from another data source -- is a great one though.