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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\db\mysql;
use yii\db\ColumnSchemaBuilder as AbstractColumnSchemaBuilder;
/**
* ColumnSchemaBuilder is the schema builder for MySQL databases.
*
* @author Chris Harris <chris@buckshotsoftware.com>
* @since 2.0.8
*/
class ColumnSchemaBuilder extends AbstractColumnSchemaBuilder
{
/**
* {@inheritdoc}
*/
protected function buildUnsignedString()
{
return $this->isUnsigned ? ' UNSIGNED' : '';
}
/**
* {@inheritdoc}
*/
protected function buildAfterString()
{
return $this->after !== null ?
' AFTER ' . $this->db->quoteColumnName($this->after) :
'';
}
/**
* {@inheritdoc}
*/
protected function buildFirstString()
{
return $this->isFirst ? ' FIRST' : '';
}
/**
* {@inheritdoc}
*/
protected function buildCommentString()
{
return $this->comment !== null ? ' COMMENT ' . $this->db->quoteValue($this->comment) : '';
}
/**
* {@inheritdoc}
*/
public function __toString()
{
switch ($this->getTypeCategory()) {
case self::CATEGORY_PK:
$format = '{type}{length}{comment}{check}{append}{pos}';
break;
case self::CATEGORY_NUMERIC:
$format = '{type}{length}{unsigned}{notnull}{default}{unique}{comment}{append}{pos}{check}';
break;
default:
$format = '{type}{length}{notnull}{default}{unique}{comment}{append}{pos}{check}';
}
return $this->buildCompleteString($format);
}
}