__construct()
__toString()
$name
$type
$valid_options
Class representing a column when creating a table
__construct(string $name, \Query\Table\[string] $type = NULL, \Query\Table\[array] $options = array())
= NULL
= array()
string
\Query\Table\[string]
\Query\Table\[array]
__toString() : string
$name : string
$type : string
$valid_options : \Query\Table\type
array('limit', 'length', 'default', 'null', 'precision', 'scale', 'after', 'update', 'comment')