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<?php
/**
* This file is part of the Nette Framework (http://nette.org)
*
* Copyright (c) 2004 David Grudl (http://davidgrudl.com)
*
* For the full copyright and license information, please view
* the file license.txt that was distributed with this source code.
*/
namespace Nette\Database\Drivers;
use Nette;
/**
* Supplemental MySQL database driver.
*
* @author David Grudl
*/
class MySqlDriver extends Nette\Object implements Nette\Database\ISupplementalDriver
{
const ERROR_ACCESS_DENIED = 1045;
const ERROR_DUPLICATE_ENTRY = 1062;
const ERROR_DATA_TRUNCATED = 1265;
/** @var Nette\Database\Connection */
private $connection;
/**
* Driver options:
* - charset => character encoding to set (default is utf8)
* - sqlmode => see http://dev.mysql.com/doc/refman/5.0/en/server-sql-mode.html
*/
public function __construct(Nette\Database\Connection $connection, array $options)
{
$this->connection = $connection;
$charset = isset($options['charset']) ? $options['charset'] : 'utf8';
if ($charset) {
$connection->exec("SET NAMES '$charset'");
}
if (isset($options['sqlmode'])) {
$connection->exec("SET sql_mode='$options[sqlmode]'");
}
$connection->exec("SET time_zone='" . date('P') . "'");
}
/********************* SQL ****************d*g**/
/**
* Delimites identifier for use in a SQL statement.
*/
public function delimite($name)
{
// @see http://dev.mysql.com/doc/refman/5.0/en/identifiers.html
return '`' . str_replace('`', '``', $name) . '`';
}
/**
* Formats boolean for use in a SQL statement.
*/
public function formatBool($value)
{
return $value ? '1' : '0';
}
/**
* Formats date-time for use in a SQL statement.
*/
public function formatDateTime(\DateTime $value)
{
return $value->format("'Y-m-d H:i:s'");
}
/**
* Encodes string for use in a LIKE statement.
*/
public function formatLike($value, $pos)
{
$value = addcslashes(str_replace('\\', '\\\\', $value), "\x00\n\r\\'%_");
return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'");
}
/**
* Injects LIMIT/OFFSET to the SQL query.
*/
public function applyLimit(&$sql, $limit, $offset)
{
if ($limit >= 0 || $offset > 0) {
// see http://dev.mysql.com/doc/refman/5.0/en/select.html
$sql .= ' LIMIT ' . ($limit < 0 ? '18446744073709551615' : (int) $limit)
. ($offset > 0 ? ' OFFSET ' . (int) $offset : '');
}
}
/**
* Normalizes result row.
*/
public function normalizeRow($row, $statement)
{
return $row;
}
/********************* reflection ****************d*g**/
/**
* Returns list of tables.
*/
public function getTables()
{
/*$this->connection->query("
SELECT TABLE_NAME as name, TABLE_TYPE = 'VIEW' as view
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = DATABASE()
");*/
$tables = array();
foreach ($this->connection->query('SHOW FULL TABLES') as $row) {
$tables[] = array(
'name' => $row[0],
'view' => isset($row[1]) && $row[1] === 'VIEW',
);
}
return $tables;
}
/**
* Returns metadata for all columns in a table.
*/
public function getColumns($table)
{
/*$this->connection->query("
SELECT *
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = {$this->connection->quote($table)} AND TABLE_SCHEMA = DATABASE()
");*/
$columns = array();
foreach ($this->connection->query('SHOW FULL COLUMNS FROM ' . $this->delimite($table)) as $row) {
$type = explode('(', $row['Type']);
$columns[] = array(
'name' => $row['Field'],
'table' => $table,
'nativetype' => strtoupper($type[0]),
'size' => isset($type[1]) ? (int) $type[1] : NULL,
'unsigned' => (bool) strstr($row['Type'], 'unsigned'),
'nullable' => $row['Null'] === 'YES',
'default' => $row['Default'],
'autoincrement' => $row['Extra'] === 'auto_increment',
'primary' => $row['Key'] === 'PRI',
'vendor' => (array) $row,
);
}
return $columns;
}
/**
* Returns metadata for all indexes in a table.
*/
public function getIndexes($table)
{
/*$this->connection->query("
SELECT *
FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE
WHERE TABLE_NAME = {$this->connection->quote($table)} AND TABLE_SCHEMA = DATABASE()
AND REFERENCED_COLUMN_NAME IS NULL
");*/
$indexes = array();
foreach ($this->connection->query('SHOW INDEX FROM ' . $this->delimite($table)) as $row) {
$indexes[$row['Key_name']]['name'] = $row['Key_name'];
$indexes[$row['Key_name']]['unique'] = !$row['Non_unique'];
$indexes[$row['Key_name']]['primary'] = $row['Key_name'] === 'PRIMARY';
$indexes[$row['Key_name']]['columns'][$row['Seq_in_index'] - 1] = $row['Column_name'];
}
return array_values($indexes);
}
/**
* Returns metadata for all foreign keys in a table.
*/
public function getForeignKeys($table)
{
$keys = array();
$query = 'SELECT CONSTRAINT_NAME, COLUMN_NAME, REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME FROM information_schema.KEY_COLUMN_USAGE '
. 'WHERE TABLE_SCHEMA = DATABASE() AND REFERENCED_TABLE_NAME IS NOT NULL AND TABLE_NAME = ' . $this->connection->quote($table);
foreach ($this->connection->query($query) as $id => $row) {
$keys[$id]['name'] = $row['CONSTRAINT_NAME']; // foreign key name
$keys[$id]['local'] = $row['COLUMN_NAME']; // local columns
$keys[$id]['table'] = $row['REFERENCED_TABLE_NAME']; // referenced table
$keys[$id]['foreign'] = $row['REFERENCED_COLUMN_NAME']; // referenced columns
}
return array_values($keys);
}
/**
* @return bool
*/
public function isSupported($item)
{
return $item === self::SUPPORT_COLUMNS_META || $item === self::SUPPORT_SELECT_UNGROUPED_COLUMNS;
}
}
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