75 lines
2.1 KiB
PHP
75 lines
2.1 KiB
PHP
<?php
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/**
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* CMysqlColumnSchema class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.yiiframework.com/
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* @copyright 2008-2013 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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/**
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* CMysqlColumnSchema class describes the column meta data of a MySQL table.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @package system.db.schema.mysql
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* @since 1.0
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*/
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class CMysqlColumnSchema extends CDbColumnSchema
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{
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/**
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* Extracts the PHP type from DB type.
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* @param string $dbType DB type
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*/
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protected function extractType($dbType)
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{
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if(strncmp($dbType,'enum',4)===0)
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$this->type='string';
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elseif(strpos($dbType,'float')!==false || strpos($dbType,'double')!==false)
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$this->type='double';
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elseif(strpos($dbType,'bool')!==false)
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$this->type='boolean';
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elseif(strpos($dbType,'int')===0 && strpos($dbType,'unsigned')===false || preg_match('/(bit|tinyint|smallint|mediumint)/',$dbType))
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$this->type='integer';
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else
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$this->type='string';
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}
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/**
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* Extracts the default value for the column.
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* The value is typecasted to correct PHP type.
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* @param mixed $defaultValue the default value obtained from metadata
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*/
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protected function extractDefault($defaultValue)
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{
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if(strncmp($this->dbType,'bit',3)===0)
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$this->defaultValue=bindec(trim($defaultValue,'b\''));
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elseif($this->dbType==='timestamp' && $defaultValue==='CURRENT_TIMESTAMP')
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$this->defaultValue=null;
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else
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parent::extractDefault($defaultValue);
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}
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/**
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* Extracts size, precision and scale information from column's DB type.
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* @param string $dbType the column's DB type
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*/
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protected function extractLimit($dbType)
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{
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if (strncmp($dbType, 'enum', 4)===0 && preg_match('/\(([\'"])(.*)\\1\)/',$dbType,$matches))
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{
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// explode by (single or double) quote and comma (ENUM values may contain commas)
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$values = explode($matches[1].','.$matches[1], $matches[2]);
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$size = 0;
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foreach($values as $value)
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{
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if(($n=strlen($value)) > $size)
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$size=$n;
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}
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$this->size = $this->precision = $size;
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}
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else
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parent::extractLimit($dbType);
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}
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}
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