
This has always been possible, but the syntax is a bit obscure, and our user-facing docs were not very helpful. Spell it out more clearly. Per complaint from Dominique Devienne. Back-patch to all supported branches. Discussion: https://postgr.es/m/CAFCRh-8JNEy+dV4SXFOrWca50u+d=--TO4cq=+ac1oBtfJy4AA@mail.gmail.com