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dbb6b3f6cf
- fix TRUNCATE TABLE syntax (mssql does not understand TRUNCATE alone) git-svn-id: file:///svn/phpbb/trunk@5944 89ea8834-ac86-4346-8a33-228a782c2dd0
756 lines
19 KiB
PHP
756 lines
19 KiB
PHP
<?php
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/**
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*
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* @package search
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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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*/
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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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/**
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* @ignore
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*/
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include_once($phpbb_root_path . 'includes/search/search.' . $phpEx);
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/**
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* @package search
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* fulltext_mysql
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* Fulltext search for MySQL
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*/
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class fulltext_mysql extends search_backend
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{
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var $stats;
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var $word_length;
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function fulltext_mysql(&$error)
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{
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global $config;
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$this->word_length = array('min' => $config['fulltext_mysql_min_word_len'], 'max' => $config['fulltext_mysql_max_word_len']);
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$error = false;
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}
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/**
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* Checks for correct MySQL version and stores min/max word length in the config
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*/
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function init()
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{
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global $db, $user;
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if (strpos(SQL_LAYER, 'mysql') === false)
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{
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return $user->lang['FULLTEXT_MYSQL_INCOMPATIBLE_VERSION'];
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}
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$result = $db->sql_query('SELECT VERSION() AS mysql_version');
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$version = $db->sql_fetchfield('mysql_version', 0, $result);
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$db->sql_freeresult($result);
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if (!preg_match('#^4|5|6#s', $version))
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{
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return $user->lang['FULLTEXT_MYSQL_INCOMPATIBLE_VERSION'];
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}
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$result = $db->sql_query('SHOW TABLE STATUS LIKE \'' . POSTS_TABLE . '\'');
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$info = $db->sql_fetchrow($result);
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$db->sql_freeresult($result);
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$engine = '';
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if (isset($info['Engine']))
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{
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$engine = $info['Engine'];
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}
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else if (isset($info['Type']))
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{
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$engine = $info['Type'];
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}
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if ($engine != 'MyISAM')
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{
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return $user->lang['FULLTEXT_MYSQL_NOT_MYISAM'];
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}
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$sql = 'SHOW VARIABLES
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LIKE \'ft\_%\'';
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$result = $db->sql_query($sql);
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$mysql_info = array();
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while ($row = $db->sql_fetchrow($result))
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{
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$mysql_info[$row['Variable_name']] = $row['Value'];
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}
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$db->sql_freeresult($result);
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set_config('fulltext_mysql_max_word_len', $mysql_info['ft_max_word_len']);
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set_config('fulltext_mysql_min_word_len', $mysql_info['ft_min_word_len']);
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return false;
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}
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/**
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* Splits keywords entered by a user into an array of words stored in $this->split_words
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*
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* @param string $keywords Contains the keyword as entered by the user
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* @param string $terms is either 'all' or 'any'
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* @return false if no valid keywords were found and otherwise true
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*/
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function split_keywords(&$keywords, $terms)
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{
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global $config;
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$this->get_ignore_words();
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$this->get_synonyms();
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if ($terms == 'all')
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{
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$match = array('#\sand\s#i', '#\sor\s#i', '#\snot\s#i', '#\+#', '#-#', '#\|#');
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$replace = array(' +', ' |', ' -', ' +', ' -', ' |');
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$keywords = preg_replace($match, $replace, $keywords);
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}
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$match = array();
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// New lines, carriage returns
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$match[] = "#[\n\r]+#";
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// NCRs like etc.
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$match[] = '#(&|&)[\#a-z0-9]+?;#i';
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// Filter out as above
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$keywords = preg_replace($match, ' ', trim($keywords));
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// Split words
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$split_keywords = preg_replace('#([^\w\'*])#', '$1$1', str_replace('\'\'', '\' \'', trim($keywords)));
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$matches = array();
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preg_match_all('#(?:[^\w*]|^)([+\-|]?(?:[\w*]+\'?)*[\w*])(?:[^\w*]|$)#', $split_keywords, $matches);
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$this->split_words = $matches[1];
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if (sizeof($this->ignore_words))
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{
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$this->common_words = array_intersect($this->split_words, $this->ignore_words);
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$this->split_words = array_diff($this->split_words, $this->ignore_words);
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}
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if (sizeof($this->replace_synonym))
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{
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$this->split_words = str_replace($this->replace_synonym, $this->match_synonym, $this->split_words);
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}
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foreach ($this->split_words as $i => $word)
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{
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$clean_word = preg_replace('#^[+\-|]#', '', $word);
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// check word length
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$clean_len = strlen(str_replace('*', '', $clean_word));
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if (($clean_len < $config['fulltext_mysql_min_word_len']) || ($clean_len > $config['fulltext_mysql_max_word_len']))
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{
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$this->common_words[] = $word;
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unset($this->split_words[$i]);
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}
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}
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if (sizeof($this->split_words))
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{
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$this->split_words = array_values($this->split_words);
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return true;
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}
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return false;
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}
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/**
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* Turns text into an array of words
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*/
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function split_message($text)
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{
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global $config;
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$this->get_ignore_words();
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$this->get_synonyms();
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// Split words
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$text = preg_replace('#([^\w\'*])#', '$1$1', str_replace('\'\'', '\' \'', trim($text)));
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$matches = array();
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preg_match_all('#(?:[^\w*]|^)([+\-|]?(?:[\w*]+\'?)*[\w*])(?:[^\w*]|$)#', $text, $matches);
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$text = $matches[1];
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if (sizeof($this->ignore_words))
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{
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$text = array_diff($text, $this->ignore_words);
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}
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if (sizeof($this->replace_synonym))
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{
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$text = str_replace($this->replace_synonym, $this->match_synonym, $text);
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}
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// remove too short or too long words
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$text = array_values($text);
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for ($i = 0, $n = sizeof($text); $i < $n; $i++)
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{
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$text[$i] = trim($text[$i]);
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if (strlen($text[$i]) < $config['fulltext_mysql_min_word_len'] || strlen($text[$i]) > $config['fulltext_mysql_max_word_len'])
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{
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unset($text[$i]);
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}
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}
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return array_values($text);
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}
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/**
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* Performs a search on keywords depending on display specific params.
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*
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* @param array $id_ary passed by reference, to be filled with ids for the page specified by $start and $per_page, should be ordered
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* @param int $start indicates the first index of the page
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* @param int $per_page number of ids each page is supposed to contain
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* @return total number of results
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*/
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function keyword_search($type, &$fields, &$terms, &$sort_by_sql, &$sort_key, &$sort_dir, &$sort_days, &$ex_fid_ary, &$m_approve_fid_ary, &$topic_id, &$author_ary, &$id_ary, $start, $per_page)
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{
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global $config, $db;
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// No keywords? No posts.
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if (!sizeof($this->split_words))
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{
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return false;
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}
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// generate a search_key from all the options to identify the results
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$search_key = md5(implode('#', array(
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implode(',', $this->split_words),
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$type,
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$fields,
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$terms,
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$sort_days,
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$sort_key,
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$topic_id,
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implode(',', $ex_fid_ary),
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implode(',', $m_approve_fid_ary),
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implode(',', $author_ary)
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)));
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// try reading the results from cache
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$result_count = 0;
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if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
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{
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return $result_count;
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}
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$id_ary = array();
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$join_topic = ($type == 'posts') ? false : true;
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// Build sql strings for sorting
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$sql_sort = $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');
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$sql_sort_table = $sql_sort_join = '';
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switch ($sql_sort[0])
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{
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case 'u':
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$sql_sort_table = USERS_TABLE . ' u, ';
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$sql_sort_join = ($type == 'posts') ? ' AND u.user_id = p.poster_id ' : ' AND u.user_id = t.topic_poster ';
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break;
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case 't':
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$join_topic = true;
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break;
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case 'f':
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$sql_sort_table = FORUMS_TABLE . ' f, ';
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$sql_sort_join = ' AND f.forum_id = p.forum_id ';
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break;
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}
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// Build some display specific sql strings
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switch ($fields)
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{
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case 'titleonly':
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$sql_match = 'p.post_subject';
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$sql_match_where = ' AND p.post_id = t.topic_first_post_id';
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$join_topic = true;
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break;
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case 'msgonly':
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$sql_match = 'p.post_text';
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$sql_match_where = '';
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break;
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case 'firstpost':
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$sql_match = 'p.post_subject, p.post_text';
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$sql_match_where = ' AND p.post_id = t.topic_first_post_id';
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$join_topic = true;
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break;
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default:
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$sql_match = 'p.post_subject, p.post_text';
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$sql_match_where = '';
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}
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if (!sizeof($m_approve_fid_ary))
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{
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$m_approve_fid_sql = ' AND p.post_approved = 1';
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}
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else if ($m_approve_fid_ary === array(-1))
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{
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$m_approve_fid_sql = '';
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}
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else
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{
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$m_approve_fid_sql = ' AND (p.post_approved = 1 OR p.forum_id NOT IN (' . implode(', ', $m_approve_fid_ary) . '))';
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}
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$sql_select = (!$result_count) ? 'SQL_CALC_FOUND_ROWS ' : '';
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$sql_select = ($type == 'posts') ? $sql_select . 'p.post_id' : 'DISTINCT ' . $sql_select . 't.topic_id';
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$sql_from = ($join_topic) ? TOPICS_TABLE . ' t, ' : '';
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$field = ($type == 'posts') ? 'post_id' : 'topic_id';
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$sql_author = (sizeof($author_ary) == 1) ? ' = ' . $author_ary[0] : 'IN (' . implode(',', $author_ary) . ')';
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$sql_where_options = $sql_sort_join;
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$sql_where_options .= ($topic_id) ? ' AND p.topic_id = ' . $topic_id : '';
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$sql_where_options .= ($join_topic) ? ' AND t.topic_id = p.topic_id' : '';
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$sql_where_options .= (sizeof($ex_fid_ary)) ? ' AND p.forum_id NOT IN (' . implode(',', $ex_fid_ary) . ')' : '';
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$sql_where_options .= $m_approve_fid_sql;
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$sql_where_options .= (sizeof($author_ary)) ? ' AND p.poster_id ' . $sql_author : '';
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$sql_where_options .= ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
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$sql_where_options .= $sql_match_where;
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// split the words into words that have to be included or must not be included and optional words
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$words = $any_words = array();
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if ($terms == 'all')
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{
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foreach ($this->split_words as $id => $word)
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{
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if ((strpos($word, '+') === 0) || (strpos($word, '-') === 0))
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{
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$words[] = $word;
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}
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else if (strpos($word, '|') === 0)
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{
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$any_words[] = substr($word, 1);
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}
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else
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{
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$words[] = '+' . $word;
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}
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}
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}
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else
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{
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foreach ($this->split_words as $id => $word)
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{
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if ((strpos($word, '+') === 0) || (strpos($word, '-') === 0) || (strpos($word, '|') === 0))
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{
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$words[] = substr($word, 1);
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}
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else
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{
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$words[] = $word;
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}
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}
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}
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// Get the ids for the current result block
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$any_words = (sizeof($any_words)) ? ' +(' . implode(' ', $any_words) . ')' : '';
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$sql = "SELECT $sql_select
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FROM $sql_from$sql_sort_table" . POSTS_TABLE . " p
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WHERE MATCH ($sql_match) AGAINST ('" . $db->sql_escape(implode(' ', $words)) . $any_words . "' IN BOOLEAN MODE)
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$sql_where_options
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ORDER BY $sql_sort";
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$result = $db->sql_query_limit($sql, $config['search_block_size'], $start);
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while ($row = $db->sql_fetchrow($result))
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{
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$id_ary[] = $row[$field];
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}
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$db->sql_freeresult($result);
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$id_ary = array_unique($id_ary);
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if (!sizeof($id_ary))
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{
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return false;
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}
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// if the total result count is not cached yet, retrieve it from the db
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if (!$result_count)
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{
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$sql = 'SELECT FOUND_ROWS() as result_count';
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$result = $db->sql_query($sql);
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$result_count = (int) $db->sql_fetchfield('result_count');
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$db->sql_freeresult($result);
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if (!$result_count)
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{
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return false;
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}
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}
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// store the ids, from start on then delete anything that isn't on the current page because we only need ids for one page
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$this->save_ids($search_key, implode(' ', $this->split_words), $author_ary, $result_count, $id_ary, $start, $sort_dir);
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$id_ary = array_slice($id_ary, 0, (int) $per_page);
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return $result_count;
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}
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/**
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* Performs a search on an author's posts without caring about message contents. Depends on display specific params
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*
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* @param array $id_ary passed by reference, to be filled with ids for the page specified by $start and $per_page, should be ordered
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* @param int $start indicates the first index of the page
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* @param int $per_page number of ids each page is supposed to contain
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* @return total number of results
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*/
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function author_search($type, &$sort_by_sql, &$sort_key, &$sort_dir, &$sort_days, &$ex_fid_ary, &$m_approve_fid_ary, &$topic_id, &$author_ary, &$id_ary, $start, $per_page)
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{
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global $config, $db;
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// No author? No posts.
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if (!sizeof($author_ary))
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{
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return 0;
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}
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// generate a search_key from all the options to identify the results
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$search_key = md5(implode('#', array(
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'',
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$type,
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'',
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'',
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$sort_days,
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$sort_key,
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$topic_id,
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implode(',', $ex_fid_ary),
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implode(',', $m_approve_fid_ary),
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implode(',', $author_ary)
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)));
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// try reading the results from cache
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$result_count = 0;
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if ($this->obtain_ids($search_key, $result_count, $id_ary, $start, $per_page, $sort_dir) == SEARCH_RESULT_IN_CACHE)
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{
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return $result_count;
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}
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$id_ary = array();
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// Create some display specific sql strings
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$sql_author = 'p.poster_id ' . ((sizeof($author_ary) > 1) ? 'IN (' . implode(',', $author_ary) . ')' : '= ' . $author_ary[0]);
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$sql_fora = (sizeof($ex_fid_ary)) ? ' AND p.forum_id NOT IN (' . implode(',', $ex_fid_ary) . ')' : '';
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$sql_topic_id = ($topic_id) ? ' AND p.topic_id = ' . (int) $topic_id : '';
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$sql_time = ($sort_days) ? ' AND p.post_time >= ' . (time() - ($sort_days * 86400)) : '';
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// Build sql strings for sorting
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$sql_sort = $sort_by_sql[$sort_key] . (($sort_dir == 'a') ? ' ASC' : ' DESC');
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$sql_sort_table = $sql_sort_join = '';
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switch ($sql_sort[0])
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{
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case 'u':
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$sql_sort_table = USERS_TABLE . ' u, ';
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$sql_sort_join = ($type == 'posts') ? ' AND u.user_id = p.poster_id ' : ' AND u.user_id = t.topic_poster ';
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break;
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case 't':
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$sql_sort_table = ($type == 'posts') ? TOPICS_TABLE . ' t, ' : '';
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$sql_sort_join = ($type == 'posts') ? ' AND t.topic_id = p.topic_id ' : '';
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break;
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case 'f':
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$sql_sort_table = FORUMS_TABLE . ' f, ';
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$sql_sort_join = ' AND f.forum_id = p.forum_id ';
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break;
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}
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if (!sizeof($m_approve_fid_ary))
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{
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$m_approve_fid_sql = ' AND p.post_approved = 1';
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}
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else if ($m_approve_fid_ary == array(-1))
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{
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$m_approve_fid_sql = '';
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}
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else
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{
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$m_approve_fid_sql = ' AND (p.post_approved = 1 OR p.forum_id IN (' . implode($m_approve_fid_ary) . '))';
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}
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|
|
// If the cache was completely empty count the results
|
|
$calc_results = ($result_count) ? '' : 'SQL_CALC_FOUND_ROWS ';
|
|
|
|
// Build the query for really selecting the post_ids
|
|
if ($type == 'posts')
|
|
{
|
|
$sql = "SELECT {$calc_results}p.post_id
|
|
FROM " . $sql_sort_table . POSTS_TABLE . " p
|
|
WHERE $sql_author
|
|
$sql_topic_id
|
|
$m_approve_fid_sql
|
|
$sql_fora
|
|
$sql_sort_join
|
|
$sql_time
|
|
ORDER BY $sql_sort";
|
|
$field = 'post_id';
|
|
}
|
|
else
|
|
{
|
|
$sql = "SELECT {$calc_results}t.topic_id
|
|
FROM " . $sql_sort_table . TOPICS_TABLE . ' t, ' . POSTS_TABLE . " p
|
|
WHERE $sql_author
|
|
$sql_topic_id
|
|
$m_approve_fid_sql
|
|
$sql_fora
|
|
AND t.topic_id = p.topic_id
|
|
$sql_sort_join
|
|
$sql_time
|
|
GROUP BY t.topic_id
|
|
ORDER BY $sql_sort";
|
|
$field = 'topic_id';
|
|
}
|
|
|
|
// Only read one block of posts from the db and then cache it
|
|
$result = $db->sql_query_limit($sql, $config['search_block_size'], $start);
|
|
|
|
while ($row = $db->sql_fetchrow($result))
|
|
{
|
|
$id_ary[] = $row[$field];
|
|
}
|
|
$db->sql_freeresult($result);
|
|
|
|
// retrieve the total result count if needed
|
|
if (!$result_count)
|
|
{
|
|
$sql = 'SELECT FOUND_ROWS() as result_count';
|
|
$result = $db->sql_query($sql);
|
|
$result_count = (int) $db->sql_fetchfield('result_count');
|
|
$db->sql_freeresult($result);
|
|
|
|
if (!$result_count)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (sizeof($id_ary))
|
|
{
|
|
$this->save_ids($search_key, '', $author_ary, $result_count, $id_ary, $start, $sort_dir);
|
|
$id_ary = array_slice($id_ary, 0, $per_page);
|
|
|
|
return $result_count;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Destroys cached search results, that contained one of the new words in a post so the results won't be outdated.
|
|
*
|
|
* @param string $mode contains the post mode: edit, post, reply, quote ...
|
|
*/
|
|
function index($mode, $post_id, &$message, &$subject, $poster_id)
|
|
{
|
|
global $db;
|
|
|
|
// Split old and new post/subject to obtain array of words
|
|
$split_text = $this->split_message($message);
|
|
$split_title = ($subject) ? $this->split_message($subject) : array();
|
|
|
|
$words = array();
|
|
if ($mode == 'edit')
|
|
{
|
|
$old_text = array();
|
|
$old_title = array();
|
|
|
|
$sql = 'SELECT post_text, post_subject
|
|
FROM ' . POSTS_TABLE . "
|
|
WHERE post_id = $post_id";
|
|
$result = $db->sql_query($sql);
|
|
|
|
if ($row = $db->sql_fetchrow($result))
|
|
{
|
|
$old_text = $this->split_message($row['post_text']);
|
|
$old_title = $this->split_message($row['post_subject']);
|
|
}
|
|
$db->sql_freeresult($result);
|
|
|
|
$words = array_unique(array_merge(
|
|
array_diff($split_text, $old_text),
|
|
array_diff($split_title, $old_title),
|
|
array_diff($old_text, $split_text),
|
|
array_diff($old_title, $split_title)
|
|
));
|
|
unset($old_title);
|
|
unset($old_text);
|
|
}
|
|
else
|
|
{
|
|
$words = array_unique(array_merge($split_text, $split_title));
|
|
}
|
|
unset($split_text);
|
|
unset($split_title);
|
|
|
|
// destroy cached search results containing any of the words removed or added
|
|
$this->destroy_cache($words, array($poster_id));
|
|
|
|
unset($words);
|
|
}
|
|
|
|
/**
|
|
* Destroy cached results, that might be outdated after deleting a post
|
|
*/
|
|
function index_remove($post_ids, $author_ids)
|
|
{
|
|
$this->destroy_cache(array(), $author_ids);
|
|
}
|
|
|
|
/**
|
|
* Destroy old cache entries
|
|
*/
|
|
function tidy()
|
|
{
|
|
global $db, $config;
|
|
|
|
// destroy too old cached search results
|
|
$this->destroy_cache(array());
|
|
|
|
set_config('search_last_gc', time(), true);
|
|
}
|
|
|
|
/**
|
|
* Create fulltext index
|
|
*/
|
|
function create_index($acp_module, $u_action)
|
|
{
|
|
global $db;
|
|
|
|
// Make sure we can actually use MySQL with fulltext indexes
|
|
if ($error = $this->init())
|
|
{
|
|
return $error;
|
|
}
|
|
|
|
if (!is_array($this->stats))
|
|
{
|
|
$this->get_stats();
|
|
}
|
|
|
|
if (!isset($this->stats['post_subject']))
|
|
{
|
|
$db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' ADD FULLTEXT (post_subject)');
|
|
}
|
|
|
|
if (!isset($this->stats['post_text']))
|
|
{
|
|
$db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' ADD FULLTEXT (post_text)');
|
|
}
|
|
|
|
$db->sql_query('TRUNCATE TABLE ' . SEARCH_TABLE);
|
|
}
|
|
|
|
/**
|
|
* Drop fulltext index
|
|
*/
|
|
function delete_index($acp_module, $u_action)
|
|
{
|
|
global $db;
|
|
|
|
// Make sure we can actually use MySQL with fulltext indexes
|
|
if ($error = $this->init())
|
|
{
|
|
return $error;
|
|
}
|
|
|
|
if (!is_array($this->stats))
|
|
{
|
|
$this->get_stats();
|
|
}
|
|
|
|
if (isset($this->stats['post_subject']))
|
|
{
|
|
$db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' DROP INDEX post_subject');
|
|
}
|
|
|
|
if (isset($this->stats['post_text']))
|
|
{
|
|
$db->sql_query('ALTER TABLE ' . POSTS_TABLE . ' DROP INDEX post_text');
|
|
}
|
|
|
|
$db->sql_query('TRUNCATE TABLE ' . SEARCH_TABLE);
|
|
}
|
|
|
|
/**
|
|
* Returns true if both FULLTEXT indexes exist
|
|
*/
|
|
function index_created()
|
|
{
|
|
if (!is_array($this->stats))
|
|
{
|
|
$this->get_stats();
|
|
}
|
|
|
|
return (isset($this->stats['post_text']) && isset($this->stats['post_subject'])) ? true : false;
|
|
}
|
|
|
|
/**
|
|
* Returns an associative array containing information about the indexes
|
|
*/
|
|
function index_stats()
|
|
{
|
|
global $user;
|
|
|
|
if (!is_array($this->stats))
|
|
{
|
|
$this->get_stats();
|
|
}
|
|
|
|
return array(
|
|
$user->lang['FULLTEXT_MYSQL_TOTAL_POSTS'] => ($this->index_created()) ? $this->stats['total_posts'] : 0,
|
|
$user->lang['FULLTEXT_MYSQL_TEXT_CARDINALITY'] => isset($this->stats['post_text']['Cardinality']) ? $this->stats['post_text']['Cardinality'] : 0,
|
|
$user->lang['FULLTEXT_MYSQL_SUBJECT_CARDINALITY'] => isset($this->stats['post_subject']['Cardinality']) ? $this->stats['post_subject']['Cardinality'] : 0);
|
|
}
|
|
|
|
function get_stats()
|
|
{
|
|
global $db;
|
|
|
|
if (strpos(SQL_LAYER, 'mysql') === false)
|
|
{
|
|
$this->stats = array();
|
|
return;
|
|
}
|
|
|
|
$sql = 'SHOW INDEX
|
|
FROM ' . POSTS_TABLE;
|
|
$result = $db->sql_query($sql);
|
|
|
|
while ($row = $db->sql_fetchrow($result))
|
|
{
|
|
// deal with older MySQL versions which didn't use Index_type
|
|
$index_type = (isset($row['Index_type'])) ? $row['Index_type'] : $row['Comment'];
|
|
|
|
if ($index_type == 'FULLTEXT')
|
|
{
|
|
if ($row['Column_name'] == 'post_text')
|
|
{
|
|
$this->stats['post_text'] = $row;
|
|
}
|
|
else if ($row['Column_name'] == 'post_subject')
|
|
{
|
|
$this->stats['post_subject'] = $row;
|
|
}
|
|
}
|
|
}
|
|
$db->sql_freeresult($result);
|
|
|
|
$sql = 'SELECT COUNT(post_id) as total_posts
|
|
FROM ' . POSTS_TABLE;
|
|
$result = $db->sql_query($sql);
|
|
$this->stats['total_posts'] = (int) $db->sql_fetchfield('total_posts');
|
|
$db->sql_freeresult($result);
|
|
}
|
|
}
|
|
|
|
?>
|