okparanoid@xxxxxxx writes: > Hello i would like to know if not determining a max size value for a > character varying's fields decrease the perfomance (perhaps size of > stockage ? No, more the other way around: specifying varchar(N) when you had to pick N out of the air decreases performance, because of all the essentially useless checks of the string length that Postgres has to make. If you cannot defend a specific limit N as being required by your application, then just make it unconstrained varchar (or better text). Do *not* use char(N) for data with highly variable width; that one definitely will cost you performance and disk space. regards, tom lane
