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93 lines
3.0 KiB
93 lines
3.0 KiB
<?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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