# File activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb, line 843def columns(table_name,name=nil)# Limit, precision, and scale are all handled by the superclass.column_definitions(table_name).collectdo|column_name,type,default,notnull|PostgreSQLColumn.new(column_name,default,type,notnull=='f')endend