class ActiveRecord::ConnectionAdapters::ColumnDefinition

:nodoc:
for generating a number of table creation or table changing SQL statements.
columns attribute of said TableDefinition object, in order to be used
are typically created by methods in TableDefinition, and added to the
Abstract representation of a column definition. Instances of this type

def add_column_options!(sql, options) 

def add_column_options!(sql, options)
  base.add_column_options!(sql, options.merge(:column => self))
end

def sql_type 

def sql_type
  base.type_to_sql(type.to_sym, limit, precision, scale) rescue type
end

def to_sql 

def to_sql
  column_sql = "#{base.quote_column_name(name)} #{sql_type}"
  column_options = {}
  column_options[:null] = null unless null.nil?
  column_options[:default] = default unless default.nil?
  add_column_options!(column_sql, column_options) unless type.to_sym == :primary_key
  column_sql
end