On Sun, Dec 26, 2021, at 19:33, Sascha Kuhl wrote: > The Syntax is great. Which language does it come from. I consider it not > german. But I understand it mathematically. > Great extension.
It doesn't come from any language. But I've seen similar features in ORMs, such as the jOOQ Java project. [1] Actually, I think jOOQ's "ON KEY" terminology might be something to take inspiration from. In jOOQ, it's a Java method .onKey(), but I think it would look nice in SQL too: LEFT JOIN role r ON KEY p.permission_role_id_fkey I think it would be nice if we could simply using dot "." instead of "->" or whatever. I think it should be possible since "ON KEY" would avoid any ambiguity in how to interpret what comes after. We would know "permission_role_id_fkey" is a foreign key name and not a column. Or is the grammar too sensitive for such creativity? [1] https://www.jooq.org/doc/latest/manual/sql-building/table-expressions/joined-tables/join-predicate-on-key/ /Joel