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<?php
/**
* CDbTableSchema class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright 2008-2013 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
/**
* CDbTableSchema is the base class for representing the metadata of a database table.
*
* It may be extended by different DBMS driver to provide DBMS-specific table metadata.
*
* CDbTableSchema provides the following information about a table:
* <ul>
* <li>{@link name}</li>
* <li>{@link rawName}</li>
* <li>{@link columns}</li>
* <li>{@link primaryKey}</li>
* <li>{@link foreignKeys}</li>
* <li>{@link sequenceName}</li>
* </ul>
*
* @property array $columnNames List of column names.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package system.db.schema
* @since 1.0
*/
class CDbTableSchema extends CComponent
{
/**
* @var string name of this table.
*/
public $name;
/**
* @var string raw name of this table. This is the quoted version of table name with optional schema name. It can be directly used in SQLs.
*/
public $rawName;
/**
* @var string|array primary key name of this table. If composite key, an array of key names is returned.
*/
public $primaryKey;
/**
* @var string sequence name for the primary key. Null if no sequence.
*/
public $sequenceName;
/**
* @var array foreign keys of this table. The array is indexed by column name. Each value is an array of foreign table name and foreign column name.
*/
public $foreignKeys=array();
/**
* @var array column metadata of this table. Each array element is a CDbColumnSchema object, indexed by column names.
*/
public $columns=array();
/**
* Gets the named column metadata.
* This is a convenient method for retrieving a named column even if it does not exist.
* @param string $name column name
* @return CDbColumnSchema metadata of the named column. Null if the named column does not exist.
*/
public function getColumn($name)
{
return isset($this->columns[$name]) ? $this->columns[$name] : null;
}
/**
* @return array list of column names
*/
public function getColumnNames()
{
return array_keys($this->columns);
}
}
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