I think there is no difference in indexing int or floats. Only one difference is speed of comparison of this numbers. If you create normal system use 64bit ints. ------------------------ Regards, Radoslaw Smogura (mobile) -----Original Message----- From: Antonio Vieiro Sent: 22 lipca 2011 09:01 To: pgsql Subject: Choosing primary key type: 64 or 52 bit primary keys? Hi all, I'd like to use an integer number for my primary key. I need it to be bigger than 32 bits. As far as I understand I have two options: a) use all the 64 bits of a 'bigint' b) use the 52 mantissa bits of a 'double precision' My question is, which would be faster for indexing? I assume the bigint wins here, right? Thanks in advance, Antonio -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
