rails/rails — pull request #13435 by tmikoss (2013-12-21 10:40:43+00:00)
Title: Remove the default 255 char limit on string columns in Postgres

The underlying storage for varchar and text is the same in PG - defining column limits where application logic does not call for them only makes the database do unnecessary work.

See http://www.postgresql.org/docs/9.3/static/datatype-character.html for additional information.