Subs-Db-postgresql.php 25 KB

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  1. <?php
  2. /**
  3. * This file has all the main functions in it that relate to the database.
  4. *
  5. * Simple Machines Forum (SMF)
  6. *
  7. * @package SMF
  8. * @author Simple Machines http://www.simplemachines.org
  9. * @copyright 2013 Simple Machines and individual contributors
  10. * @license http://www.simplemachines.org/about/smf/license.php BSD
  11. *
  12. * @version 2.1 Alpha 1
  13. */
  14. if (!defined('SMF'))
  15. die('No direct access...');
  16. /**
  17. * Maps the implementations in this file (smf_db_function_name)
  18. * to the $smcFunc['db_function_name'] variable.
  19. * @see Subs-Db-mysql.php#smf_db_initiate
  20. *
  21. * @param type $db_server
  22. * @param type $db_name
  23. * @param type $db_user
  24. * @param type $db_passwd
  25. * @param type $db_prefix
  26. * @param type $db_options
  27. * @return null
  28. */
  29. function smf_db_initiate($db_server, $db_name, $db_user, $db_passwd, &$db_prefix, $db_options = array())
  30. {
  31. global $smcFunc, $mysql_set_mode;
  32. // Map some database specific functions, only do this once.
  33. if (!isset($smcFunc['db_fetch_assoc']) || $smcFunc['db_fetch_assoc'] != 'postg_fetch_assoc')
  34. $smcFunc += array(
  35. 'db_query' => 'smf_db_query',
  36. 'db_quote' => 'smf_db_quote',
  37. 'db_insert' => 'smf_db_insert',
  38. 'db_insert_id' => 'smf_db_insert_id',
  39. 'db_fetch_assoc' => 'smf_db_fetch_assoc',
  40. 'db_fetch_row' => 'smf_db_fetch_row',
  41. 'db_free_result' => 'pg_free_result',
  42. 'db_num_rows' => 'pg_num_rows',
  43. 'db_data_seek' => 'smf_db_data_seek',
  44. 'db_num_fields' => 'pg_num_fields',
  45. 'db_escape_string' => 'pg_escape_string',
  46. 'db_unescape_string' => 'smf_db_unescape_string',
  47. 'db_server_info' => 'smf_db_version',
  48. 'db_affected_rows' => 'smf_db_affected_rows',
  49. 'db_transaction' => 'smf_db_transaction',
  50. 'db_error' => 'pg_last_error',
  51. 'db_select_db' => 'smf_db_select_db',
  52. 'db_title' => 'PostgreSQL',
  53. 'db_sybase' => true,
  54. 'db_case_sensitive' => true,
  55. 'db_escape_wildcard_string' => 'smf_db_escape_wildcard_string',
  56. );
  57. if (!empty($db_options['persist']))
  58. $connection = @pg_pconnect('host=' . $db_server . ' dbname=' . $db_name . ' user=\'' . $db_user . '\' password=\'' . $db_passwd . '\'');
  59. else
  60. $connection = @pg_connect( 'host=' . $db_server . ' dbname=' . $db_name . ' user=\'' . $db_user . '\' password=\'' . $db_passwd . '\'');
  61. // Something's wrong, show an error if its fatal (which we assume it is)
  62. if (!$connection)
  63. {
  64. if (!empty($db_options['non_fatal']))
  65. {
  66. return null;
  67. }
  68. else
  69. {
  70. display_db_error();
  71. }
  72. }
  73. return $connection;
  74. }
  75. /**
  76. * Extend the database functionality. It calls the respective file's init
  77. * to add the implementations in that file to $smcFunc array.
  78. *
  79. * @param string $type = 'extra'
  80. */
  81. function db_extend ($type = 'extra')
  82. {
  83. global $sourcedir, $db_type;
  84. require_once($sourcedir . '/Db' . strtoupper($type[0]) . substr($type, 1) . '-' . $db_type . '.php');
  85. $initFunc = 'db_' . $type . '_init';
  86. $initFunc();
  87. }
  88. /**
  89. * Fix the database prefix if necessary.
  90. * Do nothing on postgreSQL
  91. *
  92. * @param type $db_prefix
  93. * @param type $db_name
  94. * @return type
  95. */
  96. function db_fix_prefix (&$db_prefix, $db_name)
  97. {
  98. return;
  99. }
  100. /**
  101. * Callback for preg_replace_calback on the query.
  102. * It allows to replace on the fly a few pre-defined strings, for
  103. * convenience ('query_see_board', 'query_wanna_see_board'), with
  104. * their current values from $user_info.
  105. * In addition, it performs checks and sanitization on the values
  106. * sent to the database.
  107. *
  108. * @param $matches
  109. */
  110. function smf_db_replacement__callback($matches)
  111. {
  112. global $db_callback, $user_info, $db_prefix, $smcFunc;
  113. list ($values, $connection) = $db_callback;
  114. if ($matches[1] === 'db_prefix')
  115. return $db_prefix;
  116. if ($matches[1] === 'query_see_board')
  117. return $user_info['query_see_board'];
  118. if ($matches[1] === 'query_wanna_see_board')
  119. return $user_info['query_wanna_see_board'];
  120. if ($matches[1] === 'empty')
  121. return '\'\'';
  122. if (!isset($matches[2]))
  123. smf_db_error_backtrace('Invalid value inserted or no type specified.', '', E_USER_ERROR, __FILE__, __LINE__);
  124. if ($matches[1] === 'literal')
  125. return '\'' . pg_escape_string($matches[2]) . '\'';
  126. if (!isset($values[$matches[2]]))
  127. smf_db_error_backtrace('The database value you\'re trying to insert does not exist: ' . (isset($smcFunc['htmlspecialchars']) ? $smcFunc['htmlspecialchars']($matches[2]) : htmlspecialchars($matches[2])), '', E_USER_ERROR, __FILE__, __LINE__);
  128. $replacement = $values[$matches[2]];
  129. switch ($matches[1])
  130. {
  131. case 'int':
  132. if (!is_numeric($replacement) || (string) $replacement !== (string) (int) $replacement)
  133. smf_db_error_backtrace('Wrong value type sent to the database. Integer expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  134. return (string) (int) $replacement;
  135. break;
  136. case 'string':
  137. case 'text':
  138. return sprintf('\'%1$s\'', pg_escape_string($replacement));
  139. break;
  140. case 'array_int':
  141. if (is_array($replacement))
  142. {
  143. if (empty($replacement))
  144. smf_db_error_backtrace('Database error, given array of integer values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  145. foreach ($replacement as $key => $value)
  146. {
  147. if (!is_numeric($value) || (string) $value !== (string) (int) $value)
  148. smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  149. $replacement[$key] = (string) (int) $value;
  150. }
  151. return implode(', ', $replacement);
  152. }
  153. else
  154. smf_db_error_backtrace('Wrong value type sent to the database. Array of integers expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  155. break;
  156. case 'array_string':
  157. if (is_array($replacement))
  158. {
  159. if (empty($replacement))
  160. smf_db_error_backtrace('Database error, given array of string values is empty. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  161. foreach ($replacement as $key => $value)
  162. $replacement[$key] = sprintf('\'%1$s\'', pg_escape_string($value));
  163. return implode(', ', $replacement);
  164. }
  165. else
  166. smf_db_error_backtrace('Wrong value type sent to the database. Array of strings expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  167. break;
  168. case 'date':
  169. if (preg_match('~^(\d{4})-([0-1]?\d)-([0-3]?\d)$~', $replacement, $date_matches) === 1)
  170. return sprintf('\'%04d-%02d-%02d\'', $date_matches[1], $date_matches[2], $date_matches[3]);
  171. else
  172. smf_db_error_backtrace('Wrong value type sent to the database. Date expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  173. break;
  174. case 'float':
  175. if (!is_numeric($replacement))
  176. smf_db_error_backtrace('Wrong value type sent to the database. Floating point number expected. (' . $matches[2] . ')', '', E_USER_ERROR, __FILE__, __LINE__);
  177. return (string) (float) $replacement;
  178. break;
  179. case 'identifier':
  180. return '`' . strtr($replacement, array('`' => '', '.' => '')) . '`';
  181. break;
  182. case 'raw':
  183. return $replacement;
  184. break;
  185. default:
  186. smf_db_error_backtrace('Undefined type used in the database query. (' . $matches[1] . ':' . $matches[2] . ')', '', false, __FILE__, __LINE__);
  187. break;
  188. }
  189. }
  190. /**
  191. * Just like the db_query, escape and quote a string,
  192. * but not executing the query.
  193. *
  194. * @param string $db_string
  195. * @param string $db_values
  196. * @param type $connection
  197. * @return type
  198. */
  199. function smf_db_quote($db_string, $db_values, $connection = null)
  200. {
  201. global $db_callback, $db_connection;
  202. // Only bother if there's something to replace.
  203. if (strpos($db_string, '{') !== false)
  204. {
  205. // This is needed by the callback function.
  206. $db_callback = array($db_values, $connection === null ? $db_connection : $connection);
  207. // Do the quoting and escaping
  208. $db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
  209. // Clear this global variable.
  210. $db_callback = array();
  211. }
  212. return $db_string;
  213. }
  214. /**
  215. * Do a query. Takes care of errors too.
  216. * Special queries may need additional replacements to be appropriate
  217. * for PostgreSQL.
  218. *
  219. * @param string $identifier
  220. * @param string $db_string
  221. * @param string $db_values
  222. * @param type $connection
  223. * @return boolean
  224. */
  225. function smf_db_query($identifier, $db_string, $db_values = array(), $connection = null)
  226. {
  227. global $db_cache, $db_count, $db_connection, $db_show_debug, $time_start;
  228. global $db_unbuffered, $db_callback, $db_last_result, $db_replace_result, $modSettings;
  229. // Decide which connection to use.
  230. $connection = $connection === null ? $db_connection : $connection;
  231. // Special queries that need processing.
  232. $replacements = array(
  233. 'alter_table_boards' => array(
  234. '~(.+)~' => '',
  235. ),
  236. 'alter_table_icons' => array(
  237. '~(.+)~' => '',
  238. ),
  239. 'alter_table_smileys' => array(
  240. '~(.+)~' => '',
  241. ),
  242. 'alter_table_spiders' => array(
  243. '~(.+)~' => '',
  244. ),
  245. 'ban_suggest_error_ips' => array(
  246. '~RLIKE~' => '~',
  247. '~\\.~' => '\.',
  248. ),
  249. 'ban_suggest_message_ips' => array(
  250. '~RLIKE~' => '~',
  251. '~\\.~' => '\.',
  252. ),
  253. 'consolidate_spider_stats' => array(
  254. '~MONTH\(log_time\), DAYOFMONTH\(log_time\)~' => 'MONTH(CAST(CAST(log_time AS abstime) AS timestamp)), DAYOFMONTH(CAST(CAST(log_time AS abstime) AS timestamp))',
  255. ),
  256. 'delete_subscription' => array(
  257. '~LIMIT 1~' => '',
  258. ),
  259. 'display_get_post_poster' => array(
  260. '~GROUP BY id_msg\s+HAVING~' => 'AND',
  261. ),
  262. 'attach_download_increase' => array(
  263. '~LOW_PRIORITY~' => '',
  264. ),
  265. 'boardindex_fetch_boards' => array(
  266. '~IFNULL\(lb.id_msg, 0\) >= b.id_msg_updated~' => 'CASE WHEN IFNULL(lb.id_msg, 0) >= b.id_msg_updated THEN 1 ELSE 0 END',
  267. '~(.)$~' => '$1 ORDER BY b.board_order',
  268. ),
  269. 'get_random_number' => array(
  270. '~RAND~' => 'RANDOM',
  271. ),
  272. 'insert_log_search_topics' => array(
  273. '~NOT RLIKE~' => '!~',
  274. ),
  275. 'insert_log_search_results_no_index' => array(
  276. '~NOT RLIKE~' => '!~',
  277. ),
  278. 'insert_log_search_results_subject' => array(
  279. '~NOT RLIKE~' => '!~',
  280. ),
  281. 'select_message_icons' => array(
  282. '~(.)$~' => '$1 ORDER BY icon_order',
  283. ),
  284. 'set_character_set' => array(
  285. '~SET\\s+NAMES\\s([a-zA-Z0-9\\-_]+)~' => 'SET NAMES \'$1\'',
  286. ),
  287. 'pm_conversation_list' => array(
  288. '~ORDER\\s+BY\\s+\\{raw:sort\\}~' => 'ORDER BY ' . (isset($db_values['sort']) ? ($db_values['sort'] === 'pm.id_pm' ? 'MAX(pm.id_pm)' : $db_values['sort']) : ''),
  289. ),
  290. 'top_topic_starters' => array(
  291. '~ORDER BY FIND_IN_SET\(id_member,(.+?)\)~' => 'ORDER BY STRPOS(\',\' || $1 || \',\', \',\' || id_member|| \',\')',
  292. ),
  293. 'order_by_board_order' => array(
  294. '~(.)$~' => '$1 ORDER BY b.board_order',
  295. ),
  296. 'spider_check' => array(
  297. '~(.)$~' => '$1 ORDER BY LENGTH(user_agent) DESC',
  298. ),
  299. 'unread_replies' => array(
  300. '~SELECT\\s+DISTINCT\\s+t.id_topic~' => 'SELECT t.id_topic, {raw:sort}',
  301. ),
  302. 'profile_board_stats' => array(
  303. '~COUNT\(\*\) \/ MAX\(b.num_posts\)~' => 'CAST(COUNT(*) AS DECIMAL) / CAST(b.num_posts AS DECIMAL)',
  304. ),
  305. 'set_smiley_order' => array(
  306. '~(.+)~' => '',
  307. ),
  308. );
  309. if (isset($replacements[$identifier]))
  310. $db_string = preg_replace(array_keys($replacements[$identifier]), array_values($replacements[$identifier]), $db_string);
  311. // Limits need to be a little different.
  312. $db_string = preg_replace('~\sLIMIT\s(\d+|{int:.+}),\s*(\d+|{int:.+})\s*$~i', 'LIMIT $2 OFFSET $1', $db_string);
  313. if (trim($db_string) == '')
  314. return false;
  315. // Comments that are allowed in a query are preg_removed.
  316. static $allowed_comments_from = array(
  317. '~\s+~s',
  318. '~/\*!40001 SQL_NO_CACHE \*/~',
  319. '~/\*!40000 USE INDEX \([A-Za-z\_]+?\) \*/~',
  320. '~/\*!40100 ON DUPLICATE KEY UPDATE id_msg = \d+ \*/~',
  321. );
  322. static $allowed_comments_to = array(
  323. ' ',
  324. '',
  325. '',
  326. '',
  327. );
  328. // One more query....
  329. $db_count = !isset($db_count) ? 1 : $db_count + 1;
  330. $db_replace_result = 0;
  331. if (empty($modSettings['disableQueryCheck']) && strpos($db_string, '\'') !== false && empty($db_values['security_override']))
  332. smf_db_error_backtrace('Hacking attempt...', 'Illegal character (\') used in query...', true, __FILE__, __LINE__);
  333. if (empty($db_values['security_override']) && (!empty($db_values) || strpos($db_string, '{db_prefix}') !== false))
  334. {
  335. // Pass some values to the global space for use in the callback function.
  336. $db_callback = array($db_values, $connection);
  337. // Inject the values passed to this function.
  338. $db_string = preg_replace_callback('~{([a-z_]+)(?::([a-zA-Z0-9_-]+))?}~', 'smf_db_replacement__callback', $db_string);
  339. // This shouldn't be residing in global space any longer.
  340. $db_callback = array();
  341. }
  342. // Debugging.
  343. if (isset($db_show_debug) && $db_show_debug === true)
  344. {
  345. // Get the file and line number this function was called.
  346. list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
  347. // Initialize $db_cache if not already initialized.
  348. if (!isset($db_cache))
  349. $db_cache = array();
  350. if (!empty($_SESSION['debug_redirect']))
  351. {
  352. $db_cache = array_merge($_SESSION['debug_redirect'], $db_cache);
  353. $db_count = count($db_cache) + 1;
  354. $_SESSION['debug_redirect'] = array();
  355. }
  356. $st = microtime();
  357. // Don't overload it.
  358. $db_cache[$db_count]['q'] = $db_count < 50 ? $db_string : '...';
  359. $db_cache[$db_count]['f'] = $file;
  360. $db_cache[$db_count]['l'] = $line;
  361. $db_cache[$db_count]['s'] = array_sum(explode(' ', $st)) - array_sum(explode(' ', $time_start));
  362. }
  363. // First, we clean strings out of the query, reduce whitespace, lowercase, and trim - so we can check it over.
  364. if (empty($modSettings['disableQueryCheck']))
  365. {
  366. $clean = '';
  367. $old_pos = 0;
  368. $pos = -1;
  369. while (true)
  370. {
  371. $pos = strpos($db_string, '\'', $pos + 1);
  372. if ($pos === false)
  373. break;
  374. $clean .= substr($db_string, $old_pos, $pos - $old_pos);
  375. while (true)
  376. {
  377. $pos1 = strpos($db_string, '\'', $pos + 1);
  378. $pos2 = strpos($db_string, '\\', $pos + 1);
  379. if ($pos1 === false)
  380. break;
  381. elseif ($pos2 == false || $pos2 > $pos1)
  382. {
  383. $pos = $pos1;
  384. break;
  385. }
  386. $pos = $pos2 + 1;
  387. }
  388. $clean .= ' %s ';
  389. $old_pos = $pos + 1;
  390. }
  391. $clean .= substr($db_string, $old_pos);
  392. $clean = trim(strtolower(preg_replace($allowed_comments_from, $allowed_comments_to, $clean)));
  393. // We don't use UNION in SMF, at least so far. But it's useful for injections.
  394. if (strpos($clean, 'union') !== false && preg_match('~(^|[^a-z])union($|[^[a-z])~s', $clean) != 0)
  395. $fail = true;
  396. // Comments? We don't use comments in our queries, we leave 'em outside!
  397. elseif (strpos($clean, '/*') > 2 || strpos($clean, '--') !== false || strpos($clean, ';') !== false)
  398. $fail = true;
  399. // Trying to change passwords, slow us down, or something?
  400. elseif (strpos($clean, 'sleep') !== false && preg_match('~(^|[^a-z])sleep($|[^[_a-z])~s', $clean) != 0)
  401. $fail = true;
  402. elseif (strpos($clean, 'benchmark') !== false && preg_match('~(^|[^a-z])benchmark($|[^[a-z])~s', $clean) != 0)
  403. $fail = true;
  404. // Sub selects? We don't use those either.
  405. elseif (preg_match('~\([^)]*?select~s', $clean) != 0)
  406. $fail = true;
  407. if (!empty($fail) && function_exists('log_error'))
  408. smf_db_error_backtrace('Hacking attempt...', 'Hacking attempt...' . "\n" . $db_string, E_USER_ERROR, __FILE__, __LINE__);
  409. }
  410. $db_last_result = @pg_query($connection, $db_string);
  411. if ($db_last_result === false && empty($db_values['db_error_skip']))
  412. $db_last_result = smf_db_error($db_string, $connection);
  413. // Debugging.
  414. if (isset($db_show_debug) && $db_show_debug === true)
  415. $db_cache[$db_count]['t'] = array_sum(explode(' ', microtime())) - array_sum(explode(' ', $st));
  416. return $db_last_result;
  417. }
  418. /**
  419. * affected_rows
  420. * @param resource $connection
  421. */
  422. function smf_db_affected_rows($result = null)
  423. {
  424. global $db_last_result, $db_replace_result;
  425. if ($db_replace_result)
  426. return $db_replace_result;
  427. elseif ($result === null && !$db_last_result)
  428. return 0;
  429. return pg_affected_rows($result === null ? $db_last_result : $result);
  430. }
  431. /**
  432. * insert_id
  433. *
  434. * @param string $table
  435. * @param string $field = null
  436. * @param resource $connection = null
  437. */
  438. function smf_db_insert_id($table, $field = null, $connection = null)
  439. {
  440. global $db_connection, $smcFunc, $db_prefix;
  441. $table = str_replace('{db_prefix}', $db_prefix, $table);
  442. if ($connection === false)
  443. $connection = $db_connection;
  444. // Try get the last ID for the auto increment field.
  445. $request = $smcFunc['db_query']('', 'SELECT CURRVAL(\'' . $table . '_seq\') AS insertID',
  446. array(
  447. )
  448. );
  449. if (!$request)
  450. return false;
  451. list ($lastID) = $smcFunc['db_fetch_row']($request);
  452. $smcFunc['db_free_result']($request);
  453. return $lastID;
  454. }
  455. /**
  456. * Do a transaction.
  457. *
  458. * @param string $type - the step to perform (i.e. 'begin', 'commit', 'rollback')
  459. * @param resource $connection = null
  460. */
  461. function smf_db_transaction($type = 'commit', $connection = null)
  462. {
  463. global $db_connection;
  464. // Decide which connection to use
  465. $connection = $connection === null ? $db_connection : $connection;
  466. if ($type == 'begin')
  467. return @pg_query($connection, 'BEGIN');
  468. elseif ($type == 'rollback')
  469. return @pg_query($connection, 'ROLLBACK');
  470. elseif ($type == 'commit')
  471. return @pg_query($connection, 'COMMIT');
  472. return false;
  473. }
  474. /**
  475. * Database error!
  476. * Backtrace, log, try to fix.
  477. *
  478. * @param string $db_string
  479. * @param resource $connection = null
  480. */
  481. function smf_db_error($db_string, $connection = null)
  482. {
  483. global $txt, $context, $sourcedir, $webmaster_email, $modSettings;
  484. global $forum_version, $db_connection, $db_last_error, $db_persist;
  485. global $db_server, $db_user, $db_passwd, $db_name, $db_show_debug, $ssi_db_user, $ssi_db_passwd;
  486. global $smcFunc;
  487. // We'll try recovering the file and line number the original db query was called from.
  488. list ($file, $line) = smf_db_error_backtrace('', '', 'return', __FILE__, __LINE__);
  489. // Decide which connection to use
  490. $connection = $connection === null ? $db_connection : $connection;
  491. // This is the error message...
  492. $query_error = @pg_last_error($connection);
  493. // Log the error.
  494. if (function_exists('log_error'))
  495. log_error($txt['database_error'] . ': ' . $query_error . (!empty($modSettings['enableErrorQueryLogging']) ? "\n\n" .$db_string : ''), 'database', $file, $line);
  496. // Nothing's defined yet... just die with it.
  497. if (empty($context) || empty($txt))
  498. die($query_error);
  499. // Show an error message, if possible.
  500. $context['error_title'] = $txt['database_error'];
  501. if (allowedTo('admin_forum'))
  502. $context['error_message'] = nl2br($query_error) . '<br />' . $txt['file'] . ': ' . $file . '<br />' . $txt['line'] . ': ' . $line;
  503. else
  504. $context['error_message'] = $txt['try_again'];
  505. if (allowedTo('admin_forum') && isset($db_show_debug) && $db_show_debug === true)
  506. {
  507. $context['error_message'] .= '<br /><br />' . nl2br($db_string);
  508. }
  509. // It's already been logged... don't log it again.
  510. fatal_error($context['error_message'], false);
  511. }
  512. /**
  513. * A PostgreSQL specific function for tracking the current row...
  514. *
  515. * @param $request
  516. * @param $counter
  517. */
  518. function smf_db_fetch_row($request, $counter = false)
  519. {
  520. global $db_row_count;
  521. if ($counter !== false)
  522. return pg_fetch_row($request, $counter);
  523. // Reset the row counter...
  524. if (!isset($db_row_count[(int) $request]))
  525. $db_row_count[(int) $request] = 0;
  526. // Return the right row.
  527. return @pg_fetch_row($request, $db_row_count[(int) $request]++);
  528. }
  529. /**
  530. * Get an associative array
  531. *
  532. * @param $request
  533. * @param $counter
  534. */
  535. function smf_db_fetch_assoc($request, $counter = false)
  536. {
  537. global $db_row_count;
  538. if ($counter !== false)
  539. return pg_fetch_assoc($request, $counter);
  540. // Reset the row counter...
  541. if (!isset($db_row_count[(int) $request]))
  542. $db_row_count[(int) $request] = 0;
  543. // Return the right row.
  544. return @pg_fetch_assoc($request, $db_row_count[(int) $request]++);
  545. }
  546. /**
  547. * Reset the pointer...
  548. *
  549. * @param $request
  550. * @param $counter
  551. */
  552. function smf_db_data_seek($request, $counter)
  553. {
  554. global $db_row_count;
  555. $db_row_count[(int) $request] = $counter;
  556. return true;
  557. }
  558. /**
  559. * Unescape an escaped string!
  560. *
  561. * @param $string
  562. */
  563. function smf_db_unescape_string($string)
  564. {
  565. return strtr($string, array('\'\'' => '\''));
  566. }
  567. /**
  568. * insert
  569. *
  570. * @param string $method - options 'replace', 'ignore', 'insert'
  571. * @param $table
  572. * @param $columns
  573. * @param $data
  574. * @param $keys
  575. * @param bool $disable_trans = false
  576. * @param resource $connection = null
  577. */
  578. function smf_db_insert($method = 'replace', $table, $columns, $data, $keys, $disable_trans = false, $connection = null)
  579. {
  580. global $db_replace_result, $db_in_transact, $smcFunc, $db_connection, $db_prefix;
  581. $connection = $connection === null ? $db_connection : $connection;
  582. if (empty($data))
  583. return;
  584. if (!is_array($data[array_rand($data)]))
  585. $data = array($data);
  586. // Replace the prefix holder with the actual prefix.
  587. $table = str_replace('{db_prefix}', $db_prefix, $table);
  588. $priv_trans = false;
  589. if ((count($data) > 1 || $method == 'replace') && !$db_in_transact && !$disable_trans)
  590. {
  591. $smcFunc['db_transaction']('begin', $connection);
  592. $priv_trans = true;
  593. }
  594. // PostgreSQL doesn't support replace: we implement a MySQL-compatible behavior instead
  595. if ($method == 'replace')
  596. {
  597. $count = 0;
  598. $where = '';
  599. foreach ($columns as $columnName => $type)
  600. {
  601. // Are we restricting the length?
  602. if (strpos($type, 'string-') !== false)
  603. $actualType = sprintf($columnName . ' = SUBSTRING({string:%1$s}, 1, ' . substr($type, 7) . '), ', $count);
  604. else
  605. $actualType = sprintf($columnName . ' = {%1$s:%2$s}, ', $type, $count);
  606. // A key? That's what we were looking for.
  607. if (in_array($columnName, $keys))
  608. $where .= (empty($where) ? '' : ' AND ') . substr($actualType, 0, -2);
  609. $count++;
  610. }
  611. // Make it so.
  612. if (!empty($where) && !empty($data))
  613. {
  614. foreach ($data as $k => $entry)
  615. {
  616. $smcFunc['db_query']('', '
  617. DELETE FROM ' . $table .
  618. ' WHERE ' . $where,
  619. $entry, $connection
  620. );
  621. }
  622. }
  623. }
  624. if (!empty($data))
  625. {
  626. // Create the mold for a single row insert.
  627. $insertData = '(';
  628. foreach ($columns as $columnName => $type)
  629. {
  630. // Are we restricting the length?
  631. if (strpos($type, 'string-') !== false)
  632. $insertData .= sprintf('SUBSTRING({string:%1$s}, 1, ' . substr($type, 7) . '), ', $columnName);
  633. else
  634. $insertData .= sprintf('{%1$s:%2$s}, ', $type, $columnName);
  635. }
  636. $insertData = substr($insertData, 0, -2) . ')';
  637. // Create an array consisting of only the columns.
  638. $indexed_columns = array_keys($columns);
  639. // Here's where the variables are injected to the query.
  640. $insertRows = array();
  641. foreach ($data as $dataRow)
  642. $insertRows[] = smf_db_quote($insertData, array_combine($indexed_columns, $dataRow), $connection);
  643. foreach ($insertRows as $entry)
  644. // Do the insert.
  645. $smcFunc['db_query']('', '
  646. INSERT INTO ' . $table . '("' . implode('", "', $indexed_columns) . '")
  647. VALUES
  648. ' . $entry,
  649. array(
  650. 'security_override' => true,
  651. 'db_error_skip' => $method == 'ignore' || $table === $db_prefix . 'log_errors',
  652. ),
  653. $connection
  654. );
  655. }
  656. if ($priv_trans)
  657. $smcFunc['db_transaction']('commit', $connection);
  658. }
  659. /**
  660. * Dummy function really. Doesn't do anything on PostgreSQL.
  661. *
  662. * @param unknown_type $db_name
  663. * @param unknown_type $db_connection
  664. */
  665. function smf_db_select_db($db_name, $db_connection)
  666. {
  667. return true;
  668. }
  669. /**
  670. * Get the current version.
  671. */
  672. function smf_db_version()
  673. {
  674. $version = pg_version();
  675. return $version['client'];
  676. }
  677. /**
  678. * This function tries to work out additional error information from a back trace.
  679. *
  680. * @param $error_message
  681. * @param $log_message
  682. * @param $error_type
  683. * @param $file
  684. * @param $line
  685. */
  686. function smf_db_error_backtrace($error_message, $log_message = '', $error_type = false, $file = null, $line = null)
  687. {
  688. if (empty($log_message))
  689. $log_message = $error_message;
  690. foreach (debug_backtrace() as $step)
  691. {
  692. // Found it?
  693. if (strpos($step['function'], 'query') === false && !in_array(substr($step['function'], 0, 7), array('smf_db_', 'preg_re', 'db_erro', 'call_us')) && strpos($step['function'], '__') !== 0)
  694. {
  695. $log_message .= '<br />Function: ' . $step['function'];
  696. break;
  697. }
  698. if (isset($step['line']))
  699. {
  700. $file = $step['file'];
  701. $line = $step['line'];
  702. }
  703. }
  704. // A special case - we want the file and line numbers for debugging.
  705. if ($error_type == 'return')
  706. return array($file, $line);
  707. // Is always a critical error.
  708. if (function_exists('log_error'))
  709. log_error($log_message, 'critical', $file, $line);
  710. if (function_exists('fatal_error'))
  711. {
  712. fatal_error($error_message, $error_type);
  713. // Cannot continue...
  714. exit;
  715. }
  716. elseif ($error_type)
  717. trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''), $error_type);
  718. else
  719. trigger_error($error_message . ($line !== null ? '<em>(' . basename($file) . '-' . $line . ')</em>' : ''));
  720. }
  721. /**
  722. * Escape the LIKE wildcards so that they match the character and not the wildcard.
  723. *
  724. * @param $string
  725. * @param bool $translate_human_wildcards = false, if true, turns human readable wildcards into SQL wildcards.
  726. */
  727. function smf_db_escape_wildcard_string($string, $translate_human_wildcards=false)
  728. {
  729. $replacements = array(
  730. '%' => '\%',
  731. '_' => '\_',
  732. '\\' => '\\\\',
  733. );
  734. if ($translate_human_wildcards)
  735. $replacements += array(
  736. '*' => '%',
  737. );
  738. return strtr($string, $replacements);
  739. }
  740. ?>