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<?php
/**
* TPgsqlColumnSchema class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright © 2008-2009 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
prado::using('System.db.schema.TDbColumnSchema');
/**
* TPgsqlColumnSchema class describes the column meta data of a PostgreSQL table.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.db.schema.pgsql
* @since 1.0
*/
class TPgsqlColumnSchema extends TDbColumnSchema
{
/**
* Extracts the PHP type from DB type.
* @param string DB type
*/
protected function extractType($dbType)
{
if(strpos($dbType,'integer')!==false || strpos($dbType,'oid')===0)
$this->type='integer';
else if(strpos($dbType,'bool')!==false)
$this->type='boolean';
else if(preg_match('/(real|float|double)/',$dbType))
$this->type='double';
else
$this->type='string';
}
/**
* Extracts the default value for the column.
* The value is typecasted to correct PHP type.
* @param mixed the default value obtained from metadata
*/
protected function extractDefault($defaultValue)
{
if($defaultValue==='true')
$this->defaultValue=true;
else if($defaultValue==='false')
$this->defaultValue=false;
else if(strpos($defaultValue,'nextval')===0)
$this->defaultValue=null;
else if(preg_match('/\'(.*)\'::/',$defaultValue,$matches))
$this->defaultValue=$this->typecast(str_replace("''","'",$matches[1]));
else if(preg_match('/^-?\d+(\.\d*)?$/',$defaultValue,$matches))
$this->defaultValue=$this->typecast($defaultValue);
// else is null
}
}
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