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94 lines
3.0 KiB
94 lines
3.0 KiB
14 years ago
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<?php
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/**
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* QueryBuilder 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 Copyright © 2008-2012 Yii Software LLC
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* @license http://www.yiiframework.com/license/
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*/
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namespace yii\db\dao\mysql;
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/**
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* QueryBuilder builds a SQL statement based on the specification given as a [[Query]] object.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class QueryBuilder extends \yii\db\dao\QueryBuilder
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{
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/**
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* @var array the abstract column types mapped to physical column types.
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*/
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public $columnTypes = array(
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'pk' => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
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'string' => 'varchar(255)',
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'text' => 'text',
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'smallint' => 'smallint',
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'integer' => 'int(11)',
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'bigint'=> 'bigint',
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'boolean' => 'tinyint(1)',
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'float' => 'float',
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'decimal' => 'decimal',
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'money' => 'decimal(19,4)',
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'datetime' => 'datetime',
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'timestamp' => 'timestamp',
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'time' => 'time',
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'date' => 'date',
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'binary' => 'blob',
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);
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/**
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* Builds a SQL statement for renaming a column.
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* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
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* @param string $name the old name of the column. The name will be properly quoted by the method.
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* @param string $newName the new name of the column. The name will be properly quoted by the method.
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* @return string the SQL statement for renaming a DB column.
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* @since 1.1.6
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*/
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public function renameColumn($table, $name, $newName)
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{
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$db = $this->getDbConnection();
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$row = $db->createCommand('SHOW CREATE TABLE ' . $db->quoteTableName($table))->queryRow();
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if ($row === false)
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throw new CDbException(Yii::t('yii', 'Unable to find "{column}" in table "{table}".', array('{column}' => $name, '{table}' => $table)));
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if (isset($row['Create Table']))
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$sql = $row['Create Table'];
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else
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{
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$row = array_values($row);
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$sql = $row[1];
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}
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if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches))
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{
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foreach ($matches[1] as $i => $c)
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{
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if ($c === $name)
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{
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return "ALTER TABLE " . $db->quoteTableName($table)
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. " CHANGE " . $db->quoteColumnName($name)
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. ' ' . $db->quoteColumnName($newName) . ' ' . $matches[2][$i];
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}
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}
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}
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// try to give back a SQL anyway
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return "ALTER TABLE " . $db->quoteTableName($table)
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. " CHANGE " . $db->quoteColumnName($name) . ' ' . $newName;
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}
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/**
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* Builds a SQL statement for dropping a foreign key constraint.
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* @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
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* @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
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* @return string the SQL statement for dropping a foreign key constraint.
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* @since 1.1.6
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*/
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public function dropForeignKey($name, $table)
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{
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return 'ALTER TABLE ' . $this->quoteTableName($table)
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. ' DROP FOREIGN KEY ' . $this->quoteColumnName($name);
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}
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}
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