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9c61455d26
Because the existing cache is global, there is no way to differentiate between each of two databases which may be two different DBAL objects pointing to servers with wildly different versions of an RDBMS. phpBB only has this situation in the UCF, thus only one file changed outside the DBAL. I have added a second optional parameter, $use_cache to each of the implementations of dbal::sql_server_info() PHPBB3-9637
492 lines
11 KiB
PHP
492 lines
11 KiB
PHP
<?php
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/**
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*
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* @package dbal
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* @version $Id$
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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*
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*/
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/**
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* @ignore
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*/
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if (!defined('IN_PHPBB'))
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{
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exit;
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}
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include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
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/**
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* MySQL4 Database Abstraction Layer
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* Compatible with:
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* MySQL 3.23+
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* MySQL 4.0+
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* MySQL 4.1+
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* MySQL 5.0+
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* @package dbal
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*/
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class dbal_mysql extends dbal
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{
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var $multi_insert = true;
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/**
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* Connect to server
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* @access public
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*/
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
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{
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$this->persistency = $persistency;
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$this->user = $sqluser;
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$this->server = $sqlserver . (($port) ? ':' . $port : '');
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$this->dbname = $database;
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$this->sql_layer = 'mysql4';
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$this->db_connect_id = ($this->persistency) ? @mysql_pconnect($this->server, $this->user, $sqlpassword) : @mysql_connect($this->server, $this->user, $sqlpassword, $new_link);
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if ($this->db_connect_id && $this->dbname != '')
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{
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if (@mysql_select_db($this->dbname, $this->db_connect_id))
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{
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// Determine what version we are using and if it natively supports UNICODE
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if (version_compare($this->sql_server_info(true), '4.1.0', '>='))
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{
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@mysql_query("SET NAMES 'utf8'", $this->db_connect_id);
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// enforce strict mode on databases that support it
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if (version_compare($this->sql_server_info(true), '5.0.2', '>='))
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{
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$result = @mysql_query('SELECT @@session.sql_mode AS sql_mode', $this->db_connect_id);
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$row = @mysql_fetch_assoc($result);
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@mysql_free_result($result);
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$modes = array_map('trim', explode(',', $row['sql_mode']));
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// TRADITIONAL includes STRICT_ALL_TABLES and STRICT_TRANS_TABLES
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if (!in_array('TRADITIONAL', $modes))
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{
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if (!in_array('STRICT_ALL_TABLES', $modes))
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{
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$modes[] = 'STRICT_ALL_TABLES';
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}
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if (!in_array('STRICT_TRANS_TABLES', $modes))
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{
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$modes[] = 'STRICT_TRANS_TABLES';
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}
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}
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$mode = implode(',', $modes);
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@mysql_query("SET SESSION sql_mode='{$mode}'", $this->db_connect_id);
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}
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}
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else if (version_compare($this->sql_server_info(true), '4.0.0', '<'))
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{
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$this->sql_layer = 'mysql';
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}
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return $this->db_connect_id;
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}
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}
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return $this->sql_error('');
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}
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/**
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* Version information about used database
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* @param bool $raw if true, only return the fetched sql_server_version
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* @param bool $use_cache If true, it is safe to retrieve the value from the cache
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* @return string sql server version
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*/
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function sql_server_info($raw = false, $use_cache = true)
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{
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global $cache;
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if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysql_version')) === false)
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{
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$result = @mysql_query('SELECT VERSION() AS version', $this->db_connect_id);
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$row = @mysql_fetch_assoc($result);
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@mysql_free_result($result);
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$this->sql_server_version = $row['version'];
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if (!empty($cache) && $use_cache)
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{
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$cache->put('mysql_version', $this->sql_server_version);
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}
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}
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return ($raw) ? $this->sql_server_version : 'MySQL ' . $this->sql_server_version;
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}
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/**
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* SQL Transaction
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* @access private
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*/
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function _sql_transaction($status = 'begin')
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{
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switch ($status)
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{
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case 'begin':
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return @mysql_query('BEGIN', $this->db_connect_id);
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break;
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case 'commit':
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return @mysql_query('COMMIT', $this->db_connect_id);
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break;
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case 'rollback':
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return @mysql_query('ROLLBACK', $this->db_connect_id);
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break;
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}
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return true;
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}
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/**
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* Base query method
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*
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* @param string $query Contains the SQL query which shall be executed
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* @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
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* @return mixed When casted to bool the returned value returns true on success and false on failure
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*
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* @access public
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*/
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function sql_query($query = '', $cache_ttl = 0)
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{
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if ($query != '')
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{
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global $cache;
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// EXPLAIN only in extra debug mode
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if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('start', $query);
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}
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$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
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$this->sql_add_num_queries($this->query_result);
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if ($this->query_result === false)
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{
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if (($this->query_result = @mysql_query($query, $this->db_connect_id)) === false)
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{
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$this->sql_error($query);
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}
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if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('stop', $query);
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}
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if ($cache_ttl && method_exists($cache, 'sql_save'))
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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$cache->sql_save($query, $this->query_result, $cache_ttl);
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}
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else if (strpos($query, 'SELECT') === 0 && $this->query_result)
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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}
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}
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else if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('fromcache', $query);
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}
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}
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else
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{
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return false;
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}
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return $this->query_result;
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}
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/**
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* Build LIMIT query
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*/
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function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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{
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$this->query_result = false;
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// if $total is set to 0 we do not want to limit the number of rows
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if ($total == 0)
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{
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// Having a value of -1 was always a bug
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$total = '18446744073709551615';
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}
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$query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
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return $this->sql_query($query, $cache_ttl);
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}
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/**
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* Return number of affected rows
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*/
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function sql_affectedrows()
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{
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return ($this->db_connect_id) ? @mysql_affected_rows($this->db_connect_id) : false;
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}
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/**
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* Fetch current row
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*/
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function sql_fetchrow($query_id = false)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if (isset($cache->sql_rowset[$query_id]))
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{
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return $cache->sql_fetchrow($query_id);
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}
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return ($query_id !== false) ? @mysql_fetch_assoc($query_id) : false;
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}
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/**
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* Seek to given row number
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* rownum is zero-based
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*/
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function sql_rowseek($rownum, &$query_id)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if (isset($cache->sql_rowset[$query_id]))
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{
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return $cache->sql_rowseek($rownum, $query_id);
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}
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return ($query_id !== false) ? @mysql_data_seek($query_id, $rownum) : false;
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}
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/**
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* Get last inserted id after insert statement
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*/
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function sql_nextid()
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{
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return ($this->db_connect_id) ? @mysql_insert_id($this->db_connect_id) : false;
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}
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/**
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* Free sql result
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*/
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function sql_freeresult($query_id = false)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if (isset($cache->sql_rowset[$query_id]))
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{
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return $cache->sql_freeresult($query_id);
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}
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if (isset($this->open_queries[(int) $query_id]))
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{
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unset($this->open_queries[(int) $query_id]);
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return @mysql_free_result($query_id);
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}
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return false;
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}
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/**
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* Escape string used in sql query
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*/
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function sql_escape($msg)
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{
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if (!$this->db_connect_id)
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{
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return @mysql_real_escape_string($msg);
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}
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return @mysql_real_escape_string($msg, $this->db_connect_id);
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}
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/**
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* Build LIKE expression
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* @access private
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*/
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function _sql_like_expression($expression)
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{
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return $expression;
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}
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/**
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* Build db-specific query data
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* @access private
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*/
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function _sql_custom_build($stage, $data)
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{
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switch ($stage)
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{
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case 'FROM':
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$data = '(' . $data . ')';
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break;
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}
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return $data;
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}
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/**
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* return sql error array
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* @access private
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*/
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function _sql_error()
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{
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if (!$this->db_connect_id)
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{
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return array(
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'message' => @mysql_error(),
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'code' => @mysql_errno()
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);
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}
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return array(
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'message' => @mysql_error($this->db_connect_id),
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'code' => @mysql_errno($this->db_connect_id)
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);
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}
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/**
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* Close sql connection
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* @access private
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*/
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function _sql_close()
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{
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return @mysql_close($this->db_connect_id);
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}
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/**
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* Build db-specific report
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* @access private
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*/
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function _sql_report($mode, $query = '')
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{
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static $test_prof;
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// current detection method, might just switch to see the existance of INFORMATION_SCHEMA.PROFILING
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if ($test_prof === null)
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{
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$test_prof = false;
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if (version_compare($this->sql_server_info(true), '5.0.37', '>=') && version_compare($this->sql_server_info(true), '5.1', '<'))
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{
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$test_prof = true;
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}
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}
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switch ($mode)
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{
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case 'start':
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$explain_query = $query;
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if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
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{
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$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
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}
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else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
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{
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$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
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}
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if (preg_match('/^SELECT/', $explain_query))
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{
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$html_table = false;
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// begin profiling
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if ($test_prof)
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{
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@mysql_query('SET profiling = 1;', $this->db_connect_id);
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}
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if ($result = @mysql_query("EXPLAIN $explain_query", $this->db_connect_id))
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{
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while ($row = @mysql_fetch_assoc($result))
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{
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$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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}
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}
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@mysql_free_result($result);
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if ($html_table)
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{
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$this->html_hold .= '</table>';
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}
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if ($test_prof)
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{
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$html_table = false;
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// get the last profile
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if ($result = @mysql_query('SHOW PROFILE ALL;', $this->db_connect_id))
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{
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$this->html_hold .= '<br />';
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while ($row = @mysql_fetch_assoc($result))
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{
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// make <unknown> HTML safe
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if (!empty($row['Source_function']))
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{
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$row['Source_function'] = str_replace(array('<', '>'), array('<', '>'), $row['Source_function']);
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}
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// remove unsupported features
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foreach ($row as $key => $val)
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{
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if ($val === null)
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{
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unset($row[$key]);
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}
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}
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$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
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}
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}
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@mysql_free_result($result);
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if ($html_table)
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{
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$this->html_hold .= '</table>';
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}
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@mysql_query('SET profiling = 0;', $this->db_connect_id);
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}
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}
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break;
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case 'fromcache':
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$endtime = explode(' ', microtime());
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$endtime = $endtime[0] + $endtime[1];
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$result = @mysql_query($query, $this->db_connect_id);
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while ($void = @mysql_fetch_assoc($result))
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{
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// Take the time spent on parsing rows into account
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}
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@mysql_free_result($result);
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$splittime = explode(' ', microtime());
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$splittime = $splittime[0] + $splittime[1];
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$this->sql_report('record_fromcache', $query, $endtime, $splittime);
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break;
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}
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}
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}
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?>
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