lithium\data\source\database\adapter\MySql::$_constraints
Column contraints
Source
protected $_constraints = array(
'primary' => array('template' => 'PRIMARY KEY ({:column})'),
'foreign_key' => array(
'template' => 'FOREIGN KEY ({:column}) REFERENCES {:to} ({:toColumn}) {:on}'
),
'index' => array('template' => 'INDEX ({:column})'),
'unique' => array(
'template' => 'UNIQUE {:index} ({:column})',
'key' => 'KEY',
'index' => 'INDEX'
),
'check' => array('template' => 'CHECK ({:expr})')
);