I couldn't find any discussion of the idea of adding "(s)" to the variable name in order to mark the variable userset in the catalog, and I have to admit I find it a bit strange. Are we really agreed that that's the way to proceed?
-- Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/ "Having your biases confirmed independently is how scientific progress is made, and hence made our great society what it is today" (Mary Gardiner)