astropy/astropy — pull request #1234 by taldcroft (2013-07-09 16:21:41+00:00)
Title: table.join: support for int datatype as key 

table.join currently supports only strings as the join key. It would be useful if more datatypes where supported.

int would be my highest priority and int is a widely used datatype for primary keys.

int should include int64