"Andrus" <eetasoft(at)online(dot)ee> writes:
> select 1!=-1
> ERROR: operator does not exist: integer !=- integer
> Isn't this a bit stange ?
No. We couldn't really parse this any other way without disallowing -
(and +) altogether in multi-character operator names. There's a special
hack for SQL-spec compatibility, but it doesn't trigger in this case;
see
http://www.postgresql.org/docs/8.1/static/sql-syntax.html#SQL-SYNTAX-OPERATORS
regards, tom lane