Class ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::OID::Float < ActiveRecord::ConnectionAdapters::PostgreSQLAdapter::OID::Type

# File activerecord/lib/active_record/connection_adapters/postgresql/oid.rb, line 215
def type_cast(value)
  case value
    when nil;         nil
    when 'Infinity';  ::Float::INFINITY
    when '-Infinity'; -::Float::INFINITY
    when 'NaN';       ::Float::NAN
  else
    value.to_f
  end
end