You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
311 lines
9.5 KiB
311 lines
9.5 KiB
13 years ago
|
<?php
|
||
|
|
/**
|
||
|
|
* CMysqlSchema class file.
|
||
|
|
*
|
||
|
|
* @author Qiang Xue <qiang.xue@gmail.com>
|
||
|
|
* @link http://www.yiiframework.com/
|
||
|
|
* @copyright Copyright © 2008-2011 Yii Software LLC
|
||
|
|
* @license http://www.yiiframework.com/license/
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* CMysqlSchema is the class for retrieving metadata information from a MySQL database (version 4.1.x and 5.x).
|
||
|
|
*
|
||
|
|
* @author Qiang Xue <qiang.xue@gmail.com>
|
||
|
|
* @version $Id: CMysqlSchema.php 3304 2011-06-23 14:53:50Z qiang.xue $
|
||
|
|
* @package system.db.schema.mysql
|
||
|
|
* @since 1.0
|
||
|
|
*/
|
||
|
|
class CMysqlSchema extends CDbSchema
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* @var array the abstract column types mapped to physical column types.
|
||
|
|
* @since 1.1.6
|
||
|
|
*/
|
||
|
|
public $columnTypes = array(
|
||
|
|
'pk' => 'int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY',
|
||
|
|
'string' => 'varchar(255)',
|
||
|
|
'text' => 'text',
|
||
|
|
'integer' => 'int(11)',
|
||
|
|
'float' => 'float',
|
||
|
|
'decimal' => 'decimal',
|
||
|
|
'datetime' => 'datetime',
|
||
|
|
'timestamp' => 'timestamp',
|
||
|
|
'time' => 'time',
|
||
|
|
'date' => 'date',
|
||
|
|
'binary' => 'blob',
|
||
|
|
'boolean' => 'tinyint(1)',
|
||
|
|
'money' => 'decimal(19,4)',
|
||
|
|
);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Quotes a table name for use in a query.
|
||
|
|
* A simple table name does not schema prefix.
|
||
|
|
* @param string $name table name
|
||
|
|
* @return string the properly quoted table name
|
||
|
|
* @since 1.1.6
|
||
|
|
*/
|
||
|
|
public function quoteSimpleTableName($name)
|
||
|
|
{
|
||
|
|
return '`' . $name . '`';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Quotes a column name for use in a query.
|
||
|
|
* A simple column name does not contain prefix.
|
||
|
|
* @param string $name column name
|
||
|
|
* @return string the properly quoted column name
|
||
|
|
* @since 1.1.6
|
||
|
|
*/
|
||
|
|
public function quoteSimpleColumnName($name)
|
||
|
|
{
|
||
|
|
return '`' . $name . '`';
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compares two table names.
|
||
|
|
* The table names can be either quoted or unquoted. This method
|
||
|
|
* will consider both cases.
|
||
|
|
* @param string $name1 table name 1
|
||
|
|
* @param string $name2 table name 2
|
||
|
|
* @return boolean whether the two table names refer to the same table.
|
||
|
|
*/
|
||
|
|
public function compareTableNames($name1, $name2)
|
||
|
|
{
|
||
|
|
return parent::compareTableNames(strtolower($name1), strtolower($name2));
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resets the sequence value of a table's primary key.
|
||
|
|
* The sequence will be reset such that the primary key of the next new row inserted
|
||
|
|
* will have the specified value or 1.
|
||
|
|
* @param CDbTableSchema $table the table schema whose primary key sequence will be reset
|
||
|
|
* @param mixed $value the value for the primary key of the next new row inserted. If this is not set,
|
||
|
|
* the next new row's primary key will have a value 1.
|
||
|
|
* @since 1.1
|
||
|
|
*/
|
||
|
|
public function resetSequence($table, $value = null)
|
||
|
|
{
|
||
|
|
if ($table->sequenceName !== null)
|
||
|
|
{
|
||
|
|
if ($value === null)
|
||
|
|
$value = $this->getDbConnection()->createCommand("SELECT MAX(` {$table->primaryKey}`) FROM {$table->rawName}")->queryScalar() + 1;
|
||
|
|
else
|
||
|
|
$value = (int)$value;
|
||
|
|
$this->getDbConnection()->createCommand("ALTER TABLE {$table->rawName} AUTO_INCREMENT=$value")->execute();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Enables or disables integrity check.
|
||
|
|
* @param boolean $check whether to turn on or off the integrity check.
|
||
|
|
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
|
||
|
|
* @since 1.1
|
||
|
|
*/
|
||
|
|
public function checkIntegrity($check = true, $schema = '')
|
||
|
|
{
|
||
|
|
$this->getDbConnection()->createCommand('SET FOREIGN_KEY_CHECKS=' . ($check ? 1 : 0))->execute();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Loads the metadata for the specified table.
|
||
|
|
* @param string $name table name
|
||
|
|
* @return CMysqlTableSchema driver dependent table metadata. Null if the table does not exist.
|
||
|
|
*/
|
||
|
|
protected function loadTable($name)
|
||
|
|
{
|
||
|
|
$table = new CMysqlTableSchema;
|
||
|
|
$this->resolveTableNames($table, $name);
|
||
|
|
|
||
|
|
if ($this->findColumns($table))
|
||
|
|
{
|
||
|
|
$this->findConstraints($table);
|
||
|
|
return $table;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Generates various kinds of table names.
|
||
|
|
* @param CMysqlTableSchema $table the table instance
|
||
|
|
* @param string $name the unquoted table name
|
||
|
|
*/
|
||
|
|
protected function resolveTableNames($table, $name)
|
||
|
|
{
|
||
|
|
$parts = explode('.', str_replace('`', '', $name));
|
||
|
|
if (isset($parts[1]))
|
||
|
|
{
|
||
|
|
$table->schemaName = $parts[0];
|
||
|
|
$table->name = $parts[1];
|
||
|
|
$table->rawName = $this->quoteTableName($table->schemaName) . '.' . $this->quoteTableName($table->name);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$table->name = $parts[0];
|
||
|
|
$table->rawName = $this->quoteTableName($table->name);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Collects the table column metadata.
|
||
|
|
* @param CMysqlTableSchema $table the table metadata
|
||
|
|
* @return boolean whether the table exists in the database
|
||
|
|
*/
|
||
|
|
protected function findColumns($table)
|
||
|
|
{
|
||
|
|
$sql = 'SHOW COLUMNS FROM ' . $table->rawName;
|
||
|
|
try
|
||
|
|
{
|
||
|
|
$columns = $this->getDbConnection()->createCommand($sql)->queryAll();
|
||
|
|
}
|
||
|
|
catch(Exception $e)
|
||
|
|
{
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
foreach ($columns as $column)
|
||
|
|
{
|
||
|
|
$c = $this->createColumn($column);
|
||
|
|
$table->columns[$c->name] = $c;
|
||
|
|
if ($c->isPrimaryKey)
|
||
|
|
{
|
||
|
|
if ($table->primaryKey === null)
|
||
|
|
$table->primaryKey = $c->name;
|
||
|
|
elseif (is_string($table->primaryKey))
|
||
|
|
$table->primaryKey = array($table->primaryKey, $c->name);
|
||
|
|
else
|
||
|
|
$table->primaryKey[] = $c->name;
|
||
|
|
if ($c->autoIncrement)
|
||
|
|
$table->sequenceName = '';
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Creates a table column.
|
||
|
|
* @param array $column column metadata
|
||
|
|
* @return CDbColumnSchema normalized column metadata
|
||
|
|
*/
|
||
|
|
protected function createColumn($column)
|
||
|
|
{
|
||
|
|
$c = new CMysqlColumnSchema;
|
||
|
|
$c->name = $column['Field'];
|
||
|
|
$c->rawName = $this->quoteColumnName($c->name);
|
||
|
|
$c->allowNull = $column['Null'] === 'YES';
|
||
|
|
$c->isPrimaryKey = strpos($column['Key'], 'PRI') !== false;
|
||
|
|
$c->isForeignKey = false;
|
||
|
|
$c->init($column['Type'], $column['Default']);
|
||
|
|
$c->autoIncrement = strpos(strtolower($column['Extra']), 'auto_increment') !== false;
|
||
|
|
|
||
|
|
return $c;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return float server version.
|
||
|
|
*/
|
||
|
|
protected function getServerVersion()
|
||
|
|
{
|
||
|
|
$version = $this->getDbConnection()->getAttribute(PDO::ATTR_SERVER_VERSION);
|
||
|
|
$digits = array();
|
||
|
|
preg_match('/(\d+)\.(\d+)\.(\d+)/', $version, $digits);
|
||
|
|
return floatval($digits[1] . '.' . $digits[2] . $digits[3]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Collects the foreign key column details for the given table.
|
||
|
|
* @param CMysqlTableSchema $table the table metadata
|
||
|
|
*/
|
||
|
|
protected function findConstraints($table)
|
||
|
|
{
|
||
|
|
$row = $this->getDbConnection()->createCommand('SHOW CREATE TABLE ' . $table->rawName)->queryRow();
|
||
|
|
$matches = array();
|
||
|
|
$regexp = '/FOREIGN KEY\s+\(([^\)]+)\)\s+REFERENCES\s+([^\(^\s]+)\s*\(([^\)]+)\)/mi';
|
||
|
|
foreach ($row as $sql)
|
||
|
|
{
|
||
|
|
if (preg_match_all($regexp, $sql, $matches, PREG_SET_ORDER))
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
foreach ($matches as $match)
|
||
|
|
{
|
||
|
|
$keys = array_map('trim', explode(',', str_replace('`', '', $match[1])));
|
||
|
|
$fks = array_map('trim', explode(',', str_replace('`', '', $match[3])));
|
||
|
|
foreach ($keys as $k => $name)
|
||
|
|
{
|
||
|
|
$table->foreignKeys[$name] = array(str_replace('`', '', $match[2]), $fks[$k]);
|
||
|
|
if (isset($table->columns[$name]))
|
||
|
|
$table->columns[$name]->isForeignKey = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns all table names in the database.
|
||
|
|
* @param string $schema the schema of the tables. Defaults to empty string, meaning the current or default schema.
|
||
|
|
* If not empty, the returned table names will be prefixed with the schema name.
|
||
|
|
* @return array all table names in the database.
|
||
|
|
* @since 1.0.2
|
||
|
|
*/
|
||
|
|
protected function findTableNames($schema = '')
|
||
|
|
{
|
||
|
|
if ($schema === '')
|
||
|
|
return $this->getDbConnection()->createCommand('SHOW TABLES')->queryColumn();
|
||
|
|
$names = $this->getDbConnection()->createCommand('SHOW TABLES FROM ' . $this->quoteTableName($schema))->queryColumn();
|
||
|
|
foreach ($names as &$name)
|
||
|
|
$name = $schema . '.' . $name;
|
||
|
|
return $names;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Builds a SQL statement for renaming a column.
|
||
|
|
* @param string $table the table whose column is to be renamed. The name will be properly quoted by the method.
|
||
|
|
* @param string $name the old name of the column. The name will be properly quoted by the method.
|
||
|
|
* @param string $newName the new name of the column. The name will be properly quoted by the method.
|
||
|
|
* @return string the SQL statement for renaming a DB column.
|
||
|
|
* @since 1.1.6
|
||
|
|
*/
|
||
|
|
public function renameColumn($table, $name, $newName)
|
||
|
|
{
|
||
|
|
$db = $this->getDbConnection();
|
||
|
|
$row = $db->createCommand('SHOW CREATE TABLE ' . $db->quoteTableName($table))->queryRow();
|
||
|
|
if ($row === false)
|
||
|
|
throw new CDbException(Yii::t('yii', 'Unable to find "{column}" in table "{table}".', array('{column}' => $name, '{table}' => $table)));
|
||
|
|
if (isset($row['Create Table']))
|
||
|
|
$sql = $row['Create Table'];
|
||
|
|
else
|
||
|
|
{
|
||
|
|
$row = array_values($row);
|
||
|
|
$sql = $row[1];
|
||
|
|
}
|
||
|
|
if (preg_match_all('/^\s*`(.*?)`\s+(.*?),?$/m', $sql, $matches))
|
||
|
|
{
|
||
|
|
foreach ($matches[1] as $i => $c)
|
||
|
|
{
|
||
|
|
if ($c === $name)
|
||
|
|
{
|
||
|
|
return "ALTER TABLE " . $db->quoteTableName($table)
|
||
|
|
. " CHANGE " . $db->quoteColumnName($name)
|
||
|
|
. ' ' . $db->quoteColumnName($newName) . ' ' . $matches[2][$i];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// try to give back a SQL anyway
|
||
|
|
return "ALTER TABLE " . $db->quoteTableName($table)
|
||
|
|
. " CHANGE " . $db->quoteColumnName($name) . ' ' . $newName;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Builds a SQL statement for dropping a foreign key constraint.
|
||
|
|
* @param string $name the name of the foreign key constraint to be dropped. The name will be properly quoted by the method.
|
||
|
|
* @param string $table the table whose foreign is to be dropped. The name will be properly quoted by the method.
|
||
|
|
* @return string the SQL statement for dropping a foreign key constraint.
|
||
|
|
* @since 1.1.6
|
||
|
|
*/
|
||
|
|
public function dropForeignKey($name, $table)
|
||
|
|
{
|
||
|
|
return 'ALTER TABLE ' . $this->quoteTableName($table)
|
||
|
|
. ' DROP FOREIGN KEY ' . $this->quoteColumnName($name);
|
||
|
|
}
|
||
|
|
}
|