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dc35a005bc
all the table changing shenanigans we do to add permissions and groups will fail to register.
481 lines
11 KiB
PHP
481 lines
11 KiB
PHP
<?php defined('SYSPATH') or die('No direct script access.');
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/**
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* MySQL Database Driver
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*
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* $Id$
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*
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* @package Core
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class Database_Mysql_Driver extends Database_Driver {
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/**
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* Database connection link
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*/
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protected $link;
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/**
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* Database configuration
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*/
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protected $db_config;
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/**
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* Sets the config for the class.
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*
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* @param array database configuration
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*/
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public function __construct($config)
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{
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$this->db_config = $config;
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Kohana::log('debug', 'MySQL Database Driver Initialized');
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}
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/**
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* Closes the database connection.
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*/
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public function __destruct()
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{
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is_resource($this->link) and mysql_close($this->link);
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}
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public function connect()
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{
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// Check if link already exists
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if (is_resource($this->link))
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return $this->link;
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// Import the connect variables
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extract($this->db_config['connection']);
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// Persistent connections enabled?
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$connect = ($this->db_config['persistent'] == TRUE) ? 'mysql_pconnect' : 'mysql_connect';
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// Build the connection info
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$host = isset($host) ? $host : $socket;
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$port = isset($port) ? ':'.$port : '';
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// Make the connection and select the database
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if (($this->link = $connect($host.$port, $user, $pass, TRUE)) AND mysql_select_db($database, $this->link))
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{
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if ($charset = $this->db_config['character_set'])
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{
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$this->set_charset($charset);
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}
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// Clear password after successful connect
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$this->config['connection']['pass'] = NULL;
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return $this->link;
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}
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return FALSE;
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}
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public function query($sql)
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{
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// Only cache if it's turned on, and only cache if it's not a write statement
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if ($this->db_config['cache'] AND ! preg_match('#\b(?:INSERT|UPDATE|REPLACE|SET)\b#i', $sql))
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{
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$hash = $this->query_hash($sql);
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if ( ! isset(self::$query_cache[$hash]))
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{
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// Set the cached object
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self::$query_cache[$hash] = new Mysql_Result(mysql_query($sql, $this->link), $this->link, $this->db_config['object'], $sql);
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}
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// Return the cached query
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return self::$query_cache[$hash];
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}
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return new Mysql_Result(mysql_query($sql, $this->link), $this->link, $this->db_config['object'], $sql);
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}
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public function set_charset($charset)
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{
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$this->query('SET NAMES '.$this->escape_str($charset));
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}
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public function escape_table($table)
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{
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if (!$this->db_config['escape'])
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return $table;
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if (stripos($table, ' AS ') !== FALSE)
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{
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// Force 'AS' to uppercase
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$table = str_ireplace(' AS ', ' AS ', $table);
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// Runs escape_table on both sides of an AS statement
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$table = array_map(array($this, __FUNCTION__), explode(' AS ', $table));
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// Re-create the AS statement
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return implode(' AS ', $table);
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}
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return '`'.str_replace('.', '`.`', $table).'`';
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}
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public function escape_column($column)
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{
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if (!$this->db_config['escape'])
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return $column;
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if (strtolower($column) == 'count(*)' OR $column == '*')
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return $column;
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// This matches any modifiers we support to SELECT.
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if ( ! preg_match('/\b(?:rand|all|distinct(?:row)?|high_priority|sql_(?:small_result|b(?:ig_result|uffer_result)|no_cache|ca(?:che|lc_found_rows)))\s/i', $column))
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{
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if (stripos($column, ' AS ') !== FALSE)
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{
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// Force 'AS' to uppercase
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$column = str_ireplace(' AS ', ' AS ', $column);
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// Runs escape_column on both sides of an AS statement
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$column = array_map(array($this, __FUNCTION__), explode(' AS ', $column));
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// Re-create the AS statement
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return implode(' AS ', $column);
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}
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return preg_replace('/[^.*]+/', '`$0`', $column);
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}
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$parts = explode(' ', $column);
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$column = '';
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for ($i = 0, $c = count($parts); $i < $c; $i++)
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{
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// The column is always last
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if ($i == ($c - 1))
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{
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$column .= preg_replace('/[^.*]+/', '`$0`', $parts[$i]);
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}
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else // otherwise, it's a modifier
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{
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$column .= $parts[$i].' ';
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}
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}
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return $column;
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}
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public function regex($field, $match = '', $type = 'AND ', $num_regexs)
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{
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$prefix = ($num_regexs == 0) ? '' : $type;
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return $prefix.' '.$this->escape_column($field).' REGEXP \''.$this->escape_str($match).'\'';
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}
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public function notregex($field, $match = '', $type = 'AND ', $num_regexs)
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{
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$prefix = $num_regexs == 0 ? '' : $type;
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return $prefix.' '.$this->escape_column($field).' NOT REGEXP \''.$this->escape_str($match) . '\'';
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}
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public function merge($table, $keys, $values)
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{
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// Escape the column names
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foreach ($keys as $key => $value)
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{
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$keys[$key] = $this->escape_column($value);
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}
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return 'REPLACE INTO '.$this->escape_table($table).' ('.implode(', ', $keys).') VALUES ('.implode(', ', $values).')';
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}
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public function limit($limit, $offset = 0)
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{
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return 'LIMIT '.$offset.', '.$limit;
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}
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public function compile_select($database)
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{
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$sql = ($database['distinct'] == TRUE) ? 'SELECT DISTINCT ' : 'SELECT ';
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$sql .= (count($database['select']) > 0) ? implode(', ', $database['select']) : '*';
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if (count($database['from']) > 0)
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{
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// Escape the tables
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$froms = array();
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foreach ($database['from'] as $from)
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$froms[] = $this->escape_column($from);
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$sql .= "\nFROM ";
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$sql .= implode(', ', $froms);
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}
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if (count($database['join']) > 0)
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{
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$sql .= ' '.$database['join']['type'].'JOIN ('.implode(', ', $database['join']['tables']).') ON '.implode(' AND ', $database['join']['conditions']);
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}
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if (count($database['where']) > 0)
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{
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$sql .= "\nWHERE ";
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}
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$sql .= implode("\n", $database['where']);
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if (count($database['groupby']) > 0)
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{
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$sql .= "\nGROUP BY ";
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$sql .= implode(', ', $database['groupby']);
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}
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if (count($database['having']) > 0)
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{
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$sql .= "\nHAVING ";
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$sql .= implode("\n", $database['having']);
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}
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if (count($database['orderby']) > 0)
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{
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$sql .= "\nORDER BY ";
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$sql .= implode(', ', $database['orderby']);
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}
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if (is_numeric($database['limit']))
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{
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$sql .= "\n";
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$sql .= $this->limit($database['limit'], $database['offset']);
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}
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return $sql;
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}
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public function escape_str($str)
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{
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if (!$this->db_config['escape'])
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return $str;
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is_resource($this->link) or $this->connect();
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return mysql_real_escape_string($str, $this->link);
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}
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public function list_tables()
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{
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$sql = 'SHOW TABLES FROM `'.$this->db_config['connection']['database'].'`';
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$result = $this->query($sql)->result(FALSE, MYSQL_ASSOC);
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$retval = array();
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foreach ($result as $row)
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{
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$retval[] = current($row);
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}
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return $retval;
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}
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public function show_error()
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{
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return mysql_error($this->link);
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}
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public function list_fields($table)
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{
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if (!defined("TEST_MODE")) {
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static $tables;
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}
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if (empty($tables[$table]))
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{
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foreach ($this->field_data($table) as $row)
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{
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// Make an associative array
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$tables[$table][$row->Field] = $this->sql_type($row->Type);
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if ($row->Key === 'PRI' AND $row->Extra === 'auto_increment')
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{
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// For sequenced (AUTO_INCREMENT) tables
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$tables[$table][$row->Field]['sequenced'] = TRUE;
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}
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if ($row->Null === 'YES')
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{
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// Set NULL status
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$tables[$table][$row->Field]['null'] = TRUE;
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}
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}
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}
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if (!isset($tables[$table]))
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throw new Kohana_Database_Exception('database.table_not_found', $table);
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return $tables[$table];
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}
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public function field_data($table)
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{
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$columns = array();
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if ($query = mysql_query('SHOW COLUMNS FROM '.$this->escape_table($table), $this->link))
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{
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if (mysql_num_rows($query) > 0)
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{
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while ($row = mysql_fetch_object($query))
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{
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$columns[] = $row;
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}
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}
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}
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return $columns;
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}
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} // End Database_Mysql_Driver Class
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/**
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* MySQL Result
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*/
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class Mysql_Result extends Database_Result {
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// Fetch function and return type
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protected $fetch_type = 'mysql_fetch_object';
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protected $return_type = MYSQL_ASSOC;
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/**
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* Sets up the result variables.
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*
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* @param resource query result
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* @param resource database link
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* @param boolean return objects or arrays
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* @param string SQL query that was run
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*/
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public function __construct($result, $link, $object = TRUE, $sql)
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{
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$this->result = $result;
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// If the query is a resource, it was a SELECT, SHOW, DESCRIBE, EXPLAIN query
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if (is_resource($result))
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{
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$this->current_row = 0;
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$this->total_rows = mysql_num_rows($this->result);
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$this->fetch_type = ($object === TRUE) ? 'mysql_fetch_object' : 'mysql_fetch_array';
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}
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elseif (is_bool($result))
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{
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if ($result == FALSE)
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{
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// SQL error
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throw new Kohana_Database_Exception('database.error', mysql_error($link).' - '.$sql);
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}
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else
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{
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// Its an DELETE, INSERT, REPLACE, or UPDATE query
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$this->insert_id = mysql_insert_id($link);
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$this->total_rows = mysql_affected_rows($link);
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}
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}
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// Set result type
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$this->result($object);
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// Store the SQL
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$this->sql = $sql;
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}
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/**
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* Destruct, the cleanup crew!
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*/
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public function __destruct()
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{
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if (is_resource($this->result))
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{
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mysql_free_result($this->result);
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}
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}
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public function result($object = TRUE, $type = MYSQL_ASSOC)
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{
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$this->fetch_type = ((bool) $object) ? 'mysql_fetch_object' : 'mysql_fetch_array';
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// This check has to be outside the previous statement, because we do not
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// know the state of fetch_type when $object = NULL
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// NOTE - The class set by $type must be defined before fetching the result,
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// autoloading is disabled to save a lot of stupid overhead.
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if ($this->fetch_type == 'mysql_fetch_object' AND $object === TRUE)
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{
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$this->return_type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
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}
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else
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{
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$this->return_type = $type;
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}
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return $this;
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}
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public function as_array($object = NULL, $type = MYSQL_ASSOC)
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{
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return $this->result_array($object, $type);
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}
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public function result_array($object = NULL, $type = MYSQL_ASSOC)
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{
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$rows = array();
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if (is_string($object))
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{
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$fetch = $object;
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}
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elseif (is_bool($object))
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{
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if ($object === TRUE)
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{
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$fetch = 'mysql_fetch_object';
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$type = (is_string($type) AND Kohana::auto_load($type)) ? $type : 'stdClass';
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}
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else
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{
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$fetch = 'mysql_fetch_array';
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}
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}
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else
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{
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// Use the default config values
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$fetch = $this->fetch_type;
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if ($fetch == 'mysql_fetch_object')
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{
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$type = (is_string($this->return_type) AND Kohana::auto_load($this->return_type)) ? $this->return_type : 'stdClass';
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}
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}
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if (mysql_num_rows($this->result))
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{
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// Reset the pointer location to make sure things work properly
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mysql_data_seek($this->result, 0);
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while ($row = $fetch($this->result, $type))
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{
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$rows[] = $row;
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}
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}
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return isset($rows) ? $rows : array();
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}
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public function list_fields()
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{
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$field_names = array();
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while ($field = mysql_fetch_field($this->result))
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{
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$field_names[] = $field->name;
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}
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return $field_names;
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}
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public function seek($offset)
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{
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if ( ! $this->offsetExists($offset))
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return FALSE;
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return mysql_data_seek($this->result, $offset);
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}
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} // End Mysql_Result Class
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