I'm the creator of the PostgreSQL Database Modeler and I'm improving the reverse engineering feature after some requests from the users.
I've stumbled on a bug when importing operators and while I was writing a fix for that bug a great confusion came into my mind. It's about the CREATE OPERATOR syntax, more specifically, about the LEFTARG and RIGHTARG attributes.
I've read the docs but cannot find a proper answer and that's why I'm here... I hope you guys can help me. Well, my doubt is: when specifying LEFTARG and RIGHTARG the datatypes should be written in the complete form? By "complete form" I mean specifying the precision and/or length... For instance, I want to create an operator to handle certain operation between two numeric(5,2) values, said that, my operator should be written as:
CREATE OPERATOR ++ (
PROCEDURE = func_name(numeric,numeric),
LEFTARG = numeric,
RIGHTARG = numeric
)
Or(?):
CREATE OPERATOR ++ (
PROCEDURE = func_name(numeric,numeric),
LEFTARG = numeric(5,2),
RIGHTARG = numeric(5,2)
)
Well, I've tested both forms and them work fine. If I try to run one after another an error will raise for the second reporting that the operator already exists. Is PostgreSQL simply interpreting them as the same? Is the precision/length ignored/not needed?
Thanks in advance and forgive my rusty English, I'm Brazilian! :)
