Andreas Ulbrich <andreas.ulbrich@xxxxxxxxxxxxxx> writes: > In the documentation I can't find, that / is not possible as an unary > operator. > Are there any restrictions. Yeah, if you look in the bison grammar you'll find out that the operators with special precedence are hard-wired as to which syntaxes are allowed: + - prefix or infix * / % ^ < > = infix only It's possible that if we just added some more productions these could be used in nonstandard ways. But I think interest in that is really pretty low, and it might lead to behavior that would be surprising to people who aren't interested in using them in weird ways. regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general