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91 lines
3.1 KiB
91 lines
3.1 KiB
<?php |
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/** |
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* QueryBuilder class file. |
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* |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright © 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\db\mysql; |
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use yii\db\Exception; |
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/** |
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* QueryBuilder is the query builder for MySQL databases. |
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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\QueryBuilder |
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{ |
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/** |
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* @var array mapping from abstract column types (keys) to physical column types (values). |
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*/ |
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public $typeMap = array( |
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Driver::TYPE_PK => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY', |
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Driver::TYPE_STRING => 'varchar(255)', |
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Driver::TYPE_TEXT => 'text', |
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Driver::TYPE_SMALLINT => 'smallint(6)', |
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Driver::TYPE_INTEGER => 'int(11)', |
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Driver::TYPE_BIGINT => 'bigint(20)', |
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Driver::TYPE_FLOAT => 'float', |
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Driver::TYPE_DECIMAL => 'decimal', |
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Driver::TYPE_DATETIME => 'datetime', |
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Driver::TYPE_TIMESTAMP => 'timestamp', |
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Driver::TYPE_TIME => 'time', |
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Driver::TYPE_DATE => 'date', |
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Driver::TYPE_BINARY => 'blob', |
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Driver::TYPE_BOOLEAN => 'tinyint(1)', |
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Driver::TYPE_MONEY => 'decimal(19,4)', |
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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 $oldName the old name of the column. The name will be properly quoted by the method. |
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* @param string $newName the new name of the column. The name will be properly quoted by the method. |
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* @return string the SQL statement for renaming a DB column. |
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* @throws Exception |
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*/ |
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public function renameColumn($table, $oldName, $newName) |
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{ |
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$quotedTable = $this->connection->quoteTableName($table); |
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$row = $this->connection->createCommand('SHOW CREATE TABLE ' . $quotedTable)->queryRow(); |
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if ($row === false) { |
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throw new Exception("Unable to find '$oldName' in table '$table'."); |
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} |
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if (isset($row['Create Table'])) { |
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$sql = $row['Create Table']; |
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} else { |
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$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, $matches)) { |
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foreach ($matches[1] as $i => $c) { |
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if ($c === $oldName) { |
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return "ALTER TABLE $quotedTable CHANGE " |
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. $this->connection->quoteColumnName($oldName) . ' ' |
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. $this->connection->quoteColumnName($newName) . ' ' |
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. $matches[2][$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 $quotedTable CHANGE " |
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. $this->connection->quoteColumnName($oldName) . ' ' |
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. $this->connection->quoteColumnName($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 $table the table whose foreign is to be dropped. The name will be properly quoted by the method. |
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* @return string the SQL statement for dropping a foreign key constraint. |
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*/ |
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public function dropForeignKey($name, $table) |
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{ |
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return 'ALTER TABLE ' . $this->connection->quoteTableName($table) |
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. ' DROP FOREIGN KEY ' . $this->connection->quoteColumnName($name); |
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} |
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}
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