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<?php |
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/** |
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* This class handles database search. (PostgreSQL) |
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* |
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* @name ElkArte Forum |
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* @copyright ElkArte Forum contributors |
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* @license BSD http://opensource.org/licenses/BSD-3-Clause |
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* |
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* @version 1.1 |
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* |
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*/ |
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/** |
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* PostgreSQL implementation of DbSearch |
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*/ |
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class DbSearch_PostgreSQL implements DbSearch |
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{ |
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/** |
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* This instance of the search |
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* @var DbSearch_PostgreSQL |
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*/ |
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private static $_search = null; |
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/** |
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* This function will tell you whether this database type supports this search type. |
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* |
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* @param string $search_type |
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*/ |
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public function search_support($search_type) |
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{ |
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$supported_types = array('custom'); |
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return in_array($search_type, $supported_types); |
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} |
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/** |
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* Compute and execute the correct query for search. |
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* Returns the result of executing the query. |
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* |
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* @param string $identifier |
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* @param string $db_string |
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* @param mixed[] $db_values default array() |
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* @param resource|null $connection |
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*/ |
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public function search_query($identifier, $db_string, $db_values = array(), $connection = null) |
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{ |
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$db = database(); |
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$replacements = array( |
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'create_tmp_log_search_topics' => array( |
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'~mediumint\(\d\)~i' => 'int', |
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'~unsigned~i' => '', |
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'~ENGINE=MEMORY~i' => '', |
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), |
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'create_tmp_log_search_messages' => array( |
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'~mediumint\(\d\)~i' => 'int', |
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'~unsigned~i' => '', |
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'~ENGINE=MEMORY~i' => '', |
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), |
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'drop_tmp_log_search_topics' => array( |
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'~IF\sEXISTS~i' => '', |
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), |
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'drop_tmp_log_search_messages' => array( |
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'~IF\sEXISTS~i' => '', |
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), |
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'insert_into_log_messages_fulltext' => array( |
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'~LIKE~i' => 'iLIKE', |
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'~NOT\sLIKE~i' => '~NOT iLIKE', |
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'~NOT\sRLIKE~i' => '!~*', |
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'~RLIKE~i' => '~*', |
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), |
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'insert_log_search_results_subject' => array( |
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'~LIKE~i' => 'iLIKE', |
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'~NOT\sLIKE~i' => 'NOT iLIKE', |
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'~NOT\sRLIKE~i' => '!~*', |
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'~RLIKE~i' => '~*', |
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), |
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); |
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if (isset($replacements[$identifier])) |
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$db_string = preg_replace(array_keys($replacements[$identifier]), array_values($replacements[$identifier]), $db_string); |
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elseif (preg_match('~^\s*INSERT\sIGNORE~i', $db_string) != 0) |
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{ |
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$db_string = preg_replace('~^\s*INSERT\sIGNORE~i', 'INSERT', $db_string); |
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// Don't error on multi-insert. |
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$db->skip_next_error(); |
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} |
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// @deprecated since 1.1 - temporary measure until a proper skip_error is implemented |
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if (!empty($db_values['db_error_skip'])) |
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{ |
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$db->skip_next_error(); |
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} |
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$return = $db->query('', $db_string, |
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$db_values, $connection |
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); |
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return $return; |
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} |
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/** |
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* Returns some basic info about the {db_prefix}messages table |
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* Used in ManageSearch.controller.php in the page to select the index method |
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*/ |
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public function membersTableInfo() |
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{ |
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global $db_prefix, $txt; |
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$db = database(); |
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$db_table = db_table(); |
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$table_info = array(); |
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// In order to report the sizes correctly we need to perform vacuum (optimize) on the tables we will be using. |
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$db_table->optimize('{db_prefix}messages'); |
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if ($db_table->table_exists('{db_prefix}log_search_words')) |
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$db_table->optimize('{db_prefix}log_search_words'); |
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// PostGreSql has some hidden sizes. |
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$request = $db->query('', ' |
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SELECT relname, relpages * 8 *1024 AS "KB" FROM pg_class |
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WHERE relname = {string:messages} OR relname = {string:log_search_words} |
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ORDER BY relpages DESC', |
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array( |
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'messages' => $db_prefix . 'messages', |
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'log_search_words' => $db_prefix . 'log_search_words', |
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) |
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); |
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if ($request !== false && $db->num_rows($request) > 0) |
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{ |
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while ($row = $db->fetch_assoc($request)) |
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{ |
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if ($row['relname'] == $db_prefix . 'messages') |
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{ |
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$table_info['data_length'] = (int) $row['KB']; |
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$table_info['index_length'] = (int) $row['KB']; |
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// Doesn't support fulltext |
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$table_info['fulltext_length'] = $txt['not_applicable']; |
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} |
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elseif ($row['relname'] == $db_prefix . 'log_search_words') |
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{ |
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$table_info['index_length'] = (int) $row['KB']; |
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$table_info['custom_index_length'] = (int) $row['KB']; |
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} |
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} |
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$db->free_result($request); |
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} |
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View Code Duplication |
else |
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// Didn't work for some reason... |
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$table_info = array( |
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'data_length' => $txt['not_applicable'], |
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'index_length' => $txt['not_applicable'], |
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'fulltext_length' => $txt['not_applicable'], |
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'custom_index_length' => $txt['not_applicable'], |
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); |
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return $table_info; |
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} |
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/** |
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* Make a custom word index. |
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* |
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* @param string $size |
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*/ |
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public function create_word_search($size) |
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{ |
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$db = database(); |
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$size = 'int'; |
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$db->query('', ' |
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CREATE TABLE {db_prefix}log_search_words ( |
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id_word {raw:size} NOT NULL default {string:string_zero}, |
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id_msg int NOT NULL default {string:string_zero}, |
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PRIMARY KEY (id_word, id_msg) |
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)', |
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array( |
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'size' => $size, |
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'string_zero' => '0', |
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) |
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); |
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} |
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/** |
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* Static method that allows to retrieve or create an instance of this class. |
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*/ |
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public static function db_search() |
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{ |
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if (is_null(self::$_search)) |
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{ |
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self::$_search = new self(); |
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} |
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return self::$_search; |
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} |
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} |
elkarte /
Elkarte
