8c17d369fa
functions_mysql.inc.php must be loaded for install git-svn-id: http://piwigo.org/svn/trunk@4326 68402e56-0260-453c-a942-63ccdbb3a9ee
462 lines
No EOL
11 KiB
PHP
462 lines
No EOL
11 KiB
PHP
<?php
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// +-----------------------------------------------------------------------+
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// | Piwigo - a PHP based picture gallery |
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// +-----------------------------------------------------------------------+
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// | Copyright(C) 2008-2009 Piwigo Team http://piwigo.org |
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// | Copyright(C) 2003-2008 PhpWebGallery Team http://phpwebgallery.net |
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// | Copyright(C) 2002-2003 Pierrick LE GALL http://le-gall.net/pierrick |
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// +-----------------------------------------------------------------------+
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// | This program is free software; you can redistribute it and/or modify |
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// | it under the terms of the GNU General Public License as published by |
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// | the Free Software Foundation |
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// | |
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// | This program is distributed in the hope that it will be useful, but |
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// | WITHOUT ANY WARRANTY; without even the implied warranty of |
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// | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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// | General Public License for more details. |
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// | |
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// | You should have received a copy of the GNU General Public License |
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// | along with this program; if not, write to the Free Software |
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// | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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// | USA. |
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// +-----------------------------------------------------------------------+
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/**
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*
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* simple functions
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*
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*/
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function pwg_db_connect($host, $user, $password, $database)
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{
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$link = mysql_connect($host, $user, $password) or my_error('mysql_connect', true);
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mysql_select_db($database, $link) or my_error('mysql_select_db', true);
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return $link;
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}
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function pwg_db_check_charset()
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{
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defined('PWG_CHARSET') and defined('DB_CHARSET')
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or fatal_error('PWG_CHARSET and/or DB_CHARSET is not defined');
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if ( version_compare(mysql_get_server_info(), '4.1.0', '>=') )
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{
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if (DB_CHARSET!='')
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{
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pwg_query('SET NAMES "'.DB_CHARSET.'"');
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}
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}
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elseif ( strtolower(PWG_CHARSET)!='iso-8859-1' )
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{
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fatal_error('PWG supports only iso-8859-1 charset on MySql version '.mysql_get_server_info());
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}
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}
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function pwg_get_db_version()
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{
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list($mysql_version) = pwg_db_fetch_row(pwg_query('SELECT VERSION();'));
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return $mysql_version;
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}
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function pwg_query($query)
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{
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global $conf,$page,$debug,$t2;
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$start = get_moment();
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($result = mysql_query($query)) or my_error($query, $conf['die_on_sql_error']);
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$time = get_moment() - $start;
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if (!isset($page['count_queries']))
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{
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$page['count_queries'] = 0;
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$page['queries_time'] = 0;
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}
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$page['count_queries']++;
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$page['queries_time']+= $time;
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if ($conf['show_queries'])
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{
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$output = '';
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$output.= '<pre>['.$page['count_queries'].'] ';
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$output.= "\n".$query;
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$output.= "\n".'(this query time : ';
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$output.= '<b>'.number_format($time, 3, '.', ' ').' s)</b>';
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$output.= "\n".'(total SQL time : ';
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$output.= number_format($page['queries_time'], 3, '.', ' ').' s)';
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$output.= "\n".'(total time : ';
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$output.= number_format( ($time+$start-$t2), 3, '.', ' ').' s)';
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if ( $result!=null and preg_match('/\s*SELECT\s+/i',$query) )
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{
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$output.= "\n".'(num rows : ';
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$output.= mysql_num_rows($result).' )';
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}
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elseif ( $result!=null
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and preg_match('/\s*INSERT|UPDATE|REPLACE|DELETE\s+/i',$query) )
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{
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$output.= "\n".'(affected rows : ';
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$output.= mysql_affected_rows().' )';
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}
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$output.= "</pre>\n";
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$debug .= $output;
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}
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return $result;
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}
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function pwg_db_changes($result)
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{
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return mysql_affected_rows($result);
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}
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function pwg_db_num_rows($result)
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{
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return mysql_num_rows($result);
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}
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function pwg_db_fetch_assoc($result)
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{
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return mysql_fetch_assoc($result);
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}
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function pwg_db_fetch_row($result)
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{
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return mysql_fetch_row($result);
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}
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function pwg_db_fetch_object($result)
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{
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return mysql_fetch_object($result);
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}
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function pwg_free_result($result)
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{
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return mysql_free_result($result);
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}
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function pwg_db_real_escape_string($s)
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{
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return mysql_real_escape_string($s);
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}
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function pwg_db_insert_id()
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{
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return mysql_insert_id();
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}
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/**
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*
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* complex functions
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*
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*/
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/**
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* creates an array based on a query, this function is a very common pattern
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* used here
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*
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* @param string $query
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* @param string $fieldname
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* @return array
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*/
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function array_from_query($query, $fieldname)
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{
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$array = array();
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$result = pwg_query($query);
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while ($row = mysql_fetch_assoc($result))
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{
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array_push($array, $row[$fieldname]);
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}
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return $array;
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}
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define('MASS_UPDATES_SKIP_EMPTY', 1);
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/**
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* updates multiple lines in a table
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*
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* @param string table_name
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* @param array dbfields
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* @param array datas
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* @param int flags - if MASS_UPDATES_SKIP_EMPTY - empty values do not overwrite existing ones
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* @return void
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*/
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function mass_updates($tablename, $dbfields, $datas, $flags=0)
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{
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if (count($datas) == 0)
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return;
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// depending on the MySQL version, we use the multi table update or N update queries
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if (count($datas) < 10 or version_compare(mysql_get_server_info(), '4.0.4') < 0)
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{ // MySQL is prior to version 4.0.4, multi table update feature is not available
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foreach ($datas as $data)
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{
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$query = '
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UPDATE '.$tablename.'
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SET ';
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$is_first = true;
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foreach ($dbfields['update'] as $key)
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{
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$separator = $is_first ? '' : ",\n ";
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if (isset($data[$key]) and $data[$key] != '')
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{
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$query.= $separator.$key.' = \''.$data[$key].'\'';
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}
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else
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{
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if ($flags & MASS_UPDATES_SKIP_EMPTY )
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continue; // next field
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$query.= "$separator$key = NULL";
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}
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$is_first = false;
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}
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if (!$is_first)
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{// only if one field at least updated
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$query.= '
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WHERE ';
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$is_first = true;
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foreach ($dbfields['primary'] as $key)
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{
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if (!$is_first)
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{
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$query.= ' AND ';
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}
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if ( isset($data[$key]) )
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{
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$query.= $key.' = \''.$data[$key].'\'';
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}
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else
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{
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$query.= $key.' IS NULL';
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}
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$is_first = false;
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}
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pwg_query($query);
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}
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} // foreach update
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} // if mysql_ver or count<X
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else
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{
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// creation of the temporary table
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$query = '
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SHOW FULL COLUMNS FROM '.$tablename;
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$result = pwg_query($query);
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$columns = array();
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$all_fields = array_merge($dbfields['primary'], $dbfields['update']);
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while ($row = pwg_db_fetch_assoc($result))
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{
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if (in_array($row['Field'], $all_fields))
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{
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$column = $row['Field'];
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$column.= ' '.$row['Type'];
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$nullable = true;
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if (!isset($row['Null']) or $row['Null'] == '' or $row['Null']=='NO')
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{
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$column.= ' NOT NULL';
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$nullable = false;
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}
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if (isset($row['Default']))
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{
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$column.= " default '".$row['Default']."'";
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}
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elseif ($nullable)
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{
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$column.= " default NULL";
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}
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if (isset($row['Collation']) and $row['Collation'] != 'NULL')
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{
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$column.= " collate '".$row['Collation']."'";
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}
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array_push($columns, $column);
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}
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}
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$temporary_tablename = $tablename.'_'.micro_seconds();
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$query = '
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CREATE TABLE '.$temporary_tablename.'
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(
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'.implode(",\n ", $columns).',
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UNIQUE KEY the_key ('.implode(',', $dbfields['primary']).')
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)';
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pwg_query($query);
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mass_inserts($temporary_tablename, $all_fields, $datas);
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if ( $flags & MASS_UPDATES_SKIP_EMPTY )
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$func_set = create_function('$s', 'return "t1.$s = IFNULL(t2.$s, t1.$s)";');
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else
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$func_set = create_function('$s', 'return "t1.$s = t2.$s";');
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// update of images table by joining with temporary table
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$query = '
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UPDATE '.$tablename.' AS t1, '.$temporary_tablename.' AS t2
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SET '.
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implode(
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"\n , ",
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array_map($func_set,$dbfields['update'])
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).'
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WHERE '.
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implode(
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"\n AND ",
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array_map(
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create_function('$s', 'return "t1.$s = t2.$s";'),
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$dbfields['primary']
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)
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);
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pwg_query($query);
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$query = '
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DROP TABLE '.$temporary_tablename;
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pwg_query($query);
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}
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}
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/**
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* inserts multiple lines in a table
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*
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* @param string table_name
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* @param array dbfields
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* @param array inserts
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* @return void
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*/
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function mass_inserts($table_name, $dbfields, $datas)
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{
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if (count($datas) != 0)
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{
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$first = true;
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$query = 'SHOW VARIABLES LIKE \'max_allowed_packet\'';
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list(, $packet_size) = pwg_db_fetch_row(pwg_query($query));
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$packet_size = $packet_size - 2000; // The last list of values MUST not exceed 2000 character*/
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$query = '';
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foreach ($datas as $insert)
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{
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if (strlen($query) >= $packet_size)
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{
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pwg_query($query);
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$first = true;
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}
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if ($first)
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{
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$query = '
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INSERT INTO '.$table_name.'
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('.implode(',', $dbfields).')
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VALUES';
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$first = false;
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}
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else
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{
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$query .= '
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, ';
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}
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$query .= '(';
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foreach ($dbfields as $field_id => $dbfield)
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{
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if ($field_id > 0)
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{
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$query .= ',';
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}
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if (!isset($insert[$dbfield]) or $insert[$dbfield] === '')
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{
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$query .= 'NULL';
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}
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else
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{
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$query .= "'".$insert[$dbfield]."'";
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}
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}
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$query .= ')';
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}
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pwg_query($query);
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}
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}
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/**
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* Do maintenance on all PWG tables
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*
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* @return none
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*/
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function do_maintenance_all_tables()
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{
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global $prefixeTable, $page;
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$all_tables = array();
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// List all tables
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$query = 'SHOW TABLES LIKE \''.$prefixeTable.'%\'';
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$result = pwg_query($query);
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while ($row = pwg_db_fetch_assoc($result))
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{
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array_push($all_tables, $row[0]);
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}
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// Repair all tables
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$query = 'REPAIR TABLE '.implode(', ', $all_tables);
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$mysql_rc = pwg_query($query);
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// Re-Order all tables
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foreach ($all_tables as $table_name)
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{
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$all_primary_key = array();
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$query = 'DESC '.$table_name.';';
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$result = pwg_query($query);
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while ($row = pwg_db_fetch_assoc($result))
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{
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if ($row['Key'] == 'PRI')
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{
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array_push($all_primary_key, $row['Field']);
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}
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}
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if (count($all_primary_key) != 0)
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{
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$query = 'ALTER TABLE '.$table_name.' ORDER BY '.implode(', ', $all_primary_key).';';
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$mysql_rc = $mysql_rc && pwg_query($query);
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}
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}
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// Optimize all tables
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$query = 'OPTIMIZE TABLE '.implode(', ', $all_tables);
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$mysql_rc = $mysql_rc && pwg_query($query);
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if ($mysql_rc)
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{
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array_push(
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$page['infos'],
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l10n('Optimizations completed')
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);
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}
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else
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{
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array_push(
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$page['errors'],
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l10n('Optimizations errors')
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);
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}
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}
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// my_error returns (or send to standard output) the message concerning the
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// error occured for the last mysql query.
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function my_error($header, $die)
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{
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$error = "[mysql error ".mysql_errno().'] '.mysql_error()."\n";
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$error .= $header;
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if ($die)
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{
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fatal_error($error);
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}
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echo("<pre>");
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trigger_error($error, E_USER_WARNING);
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echo("</pre>");
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}
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?>
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