Verzeichnisstruktur phpBB-3.2.0
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- 06.01.2017
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postgres.php
001 <?php
002 /**
003 *
004 * This file is part of the phpBB Forum Software package.
005 *
006 * @copyright (c) phpBB Limited <https://www.phpbb.com>
007 * @license GNU General Public License, version 2 (GPL-2.0)
008 *
009 * For full copyright and license information, please see
010 * the docs/CREDITS.txt file.
011 *
012 */
013
014 namespace phpbb\db\driver;
015
016 /**
017 * PostgreSQL Database Abstraction Layer
018 * Minimum Requirement is Version 8.3+
019 */
020 class postgres extends \phpbb\db\driver\driver
021 {
022 var $multi_insert = true;
023 var $last_query_text = '';
024 var $connect_error = '';
025
026 /**
027 * {@inheritDoc}
028 */
029 function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
030 {
031 $connect_string = '';
032
033 if ($sqluser)
034 {
035 $connect_string .= "user=$sqluser ";
036 }
037
038 if ($sqlpassword)
039 {
040 $connect_string .= "password=$sqlpassword ";
041 }
042
043 if ($sqlserver)
044 {
045 // $sqlserver can carry a port separated by : for compatibility reasons
046 // If $sqlserver has more than one : it's probably an IPv6 address.
047 // In this case we only allow passing a port via the $port variable.
048 if (substr_count($sqlserver, ':') === 1)
049 {
050 list($sqlserver, $port) = explode(':', $sqlserver);
051 }
052
053 if ($sqlserver !== 'localhost')
054 {
055 $connect_string .= "host=$sqlserver ";
056 }
057
058 if ($port)
059 {
060 $connect_string .= "port=$port ";
061 }
062 }
063
064 $schema = '';
065
066 if ($database)
067 {
068 $this->dbname = $database;
069 if (strpos($database, '.') !== false)
070 {
071 list($database, $schema) = explode('.', $database);
072 }
073 $connect_string .= "dbname=$database";
074 }
075
076 $this->persistency = $persistency;
077
078 if ($this->persistency)
079 {
080 if (!function_exists('pg_pconnect'))
081 {
082 $this->connect_error = 'pg_pconnect function does not exist, is pgsql extension installed?';
083 return $this->sql_error('');
084 }
085 $collector = new \phpbb\error_collector;
086 $collector->install();
087 $this->db_connect_id = (!$new_link) ? @pg_pconnect($connect_string) : @pg_pconnect($connect_string, PGSQL_CONNECT_FORCE_NEW);
088 }
089 else
090 {
091 if (!function_exists('pg_connect'))
092 {
093 $this->connect_error = 'pg_connect function does not exist, is pgsql extension installed?';
094 return $this->sql_error('');
095 }
096 $collector = new \phpbb\error_collector;
097 $collector->install();
098 $this->db_connect_id = (!$new_link) ? @pg_connect($connect_string) : @pg_connect($connect_string, PGSQL_CONNECT_FORCE_NEW);
099 }
100
101 $collector->uninstall();
102
103 if ($this->db_connect_id)
104 {
105 if ($schema !== '')
106 {
107 @pg_query($this->db_connect_id, 'SET search_path TO ' . $schema);
108 }
109 return $this->db_connect_id;
110 }
111
112 $this->connect_error = $collector->format_errors();
113 return $this->sql_error('');
114 }
115
116 /**
117 * {@inheritDoc}
118 */
119 function sql_server_info($raw = false, $use_cache = true)
120 {
121 global $cache;
122
123 if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('pgsql_version')) === false)
124 {
125 $query_id = @pg_query($this->db_connect_id, 'SELECT VERSION() AS version');
126 if ($query_id)
127 {
128 $row = pg_fetch_assoc($query_id, null);
129 pg_free_result($query_id);
130
131 $this->sql_server_version = (!empty($row['version'])) ? trim(substr($row['version'], 10)) : 0;
132
133 if (!empty($cache) && $use_cache)
134 {
135 $cache->put('pgsql_version', $this->sql_server_version);
136 }
137 }
138 }
139
140 return ($raw) ? $this->sql_server_version : 'PostgreSQL ' . $this->sql_server_version;
141 }
142
143 /**
144 * SQL Transaction
145 * @access private
146 */
147 function _sql_transaction($status = 'begin')
148 {
149 switch ($status)
150 {
151 case 'begin':
152 return @pg_query($this->db_connect_id, 'BEGIN');
153 break;
154
155 case 'commit':
156 return @pg_query($this->db_connect_id, 'COMMIT');
157 break;
158
159 case 'rollback':
160 return @pg_query($this->db_connect_id, 'ROLLBACK');
161 break;
162 }
163
164 return true;
165 }
166
167 /**
168 * {@inheritDoc}
169 */
170 function sql_query($query = '', $cache_ttl = 0)
171 {
172 if ($query != '')
173 {
174 global $cache;
175
176 // EXPLAIN only in extra debug mode
177 if (defined('DEBUG'))
178 {
179 $this->sql_report('start', $query);
180 }
181 else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
182 {
183 $this->curtime = microtime(true);
184 }
185
186 $this->last_query_text = $query;
187 $this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
188 $this->sql_add_num_queries($this->query_result);
189
190 if ($this->query_result === false)
191 {
192 if (($this->query_result = @pg_query($this->db_connect_id, $query)) === false)
193 {
194 $this->sql_error($query);
195 }
196
197 if (defined('DEBUG'))
198 {
199 $this->sql_report('stop', $query);
200 }
201 else if (defined('PHPBB_DISPLAY_LOAD_TIME'))
202 {
203 $this->sql_time += microtime(true) - $this->curtime;
204 }
205
206 if (!$this->query_result)
207 {
208 return false;
209 }
210
211 if ($cache && $cache_ttl)
212 {
213 $this->open_queries[(int) $this->query_result] = $this->query_result;
214 $this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
215 }
216 else if (strpos($query, 'SELECT') === 0)
217 {
218 $this->open_queries[(int) $this->query_result] = $this->query_result;
219 }
220 }
221 else if (defined('DEBUG'))
222 {
223 $this->sql_report('fromcache', $query);
224 }
225 }
226 else
227 {
228 return false;
229 }
230
231 return $this->query_result;
232 }
233
234 /**
235 * Build db-specific query data
236 * @access private
237 */
238 function _sql_custom_build($stage, $data)
239 {
240 return $data;
241 }
242
243 /**
244 * Build LIMIT query
245 */
246 function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
247 {
248 $this->query_result = false;
249
250 // if $total is set to 0 we do not want to limit the number of rows
251 if ($total == 0)
252 {
253 $total = 'ALL';
254 }
255
256 $query .= "\n LIMIT $total OFFSET $offset";
257
258 return $this->sql_query($query, $cache_ttl);
259 }
260
261 /**
262 * {@inheritDoc}
263 */
264 function sql_affectedrows()
265 {
266 return ($this->query_result) ? @pg_affected_rows($this->query_result) : false;
267 }
268
269 /**
270 * {@inheritDoc}
271 */
272 function sql_fetchrow($query_id = false)
273 {
274 global $cache;
275
276 if ($query_id === false)
277 {
278 $query_id = $this->query_result;
279 }
280
281 if ($cache && $cache->sql_exists($query_id))
282 {
283 return $cache->sql_fetchrow($query_id);
284 }
285
286 return ($query_id) ? pg_fetch_assoc($query_id, null) : false;
287 }
288
289 /**
290 * {@inheritDoc}
291 */
292 function sql_rowseek($rownum, &$query_id)
293 {
294 global $cache;
295
296 if ($query_id === false)
297 {
298 $query_id = $this->query_result;
299 }
300
301 if ($cache && $cache->sql_exists($query_id))
302 {
303 return $cache->sql_rowseek($rownum, $query_id);
304 }
305
306 return ($query_id) ? @pg_result_seek($query_id, $rownum) : false;
307 }
308
309 /**
310 * {@inheritDoc}
311 */
312 function sql_nextid()
313 {
314 $query_id = $this->query_result;
315
316 if ($query_id !== false && $this->last_query_text != '')
317 {
318 if (preg_match("/^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)/is", $this->last_query_text, $tablename))
319 {
320 $query = "SELECT currval('" . $tablename[1] . "_seq') AS last_value";
321 $temp_q_id = @pg_query($this->db_connect_id, $query);
322
323 if (!$temp_q_id)
324 {
325 return false;
326 }
327
328 $temp_result = pg_fetch_assoc($temp_q_id, null);
329 pg_free_result($query_id);
330
331 return ($temp_result) ? $temp_result['last_value'] : false;
332 }
333 }
334
335 return false;
336 }
337
338 /**
339 * {@inheritDoc}
340 */
341 function sql_freeresult($query_id = false)
342 {
343 global $cache;
344
345 if ($query_id === false)
346 {
347 $query_id = $this->query_result;
348 }
349
350 if ($cache && !is_object($query_id) && $cache->sql_exists($query_id))
351 {
352 return $cache->sql_freeresult($query_id);
353 }
354
355 if (isset($this->open_queries[(int) $query_id]))
356 {
357 unset($this->open_queries[(int) $query_id]);
358 return pg_free_result($query_id);
359 }
360
361 return false;
362 }
363
364 /**
365 * {@inheritDoc}
366 */
367 function sql_escape($msg)
368 {
369 return @pg_escape_string($msg);
370 }
371
372 /**
373 * Build LIKE expression
374 * @access private
375 */
376 function _sql_like_expression($expression)
377 {
378 return $expression;
379 }
380
381 /**
382 * Build NOT LIKE expression
383 * @access private
384 */
385 function _sql_not_like_expression($expression)
386 {
387 return $expression;
388 }
389
390 /**
391 * {@inheritDoc}
392 */
393 function cast_expr_to_bigint($expression)
394 {
395 return 'CAST(' . $expression . ' as DECIMAL(255, 0))';
396 }
397
398 /**
399 * {@inheritDoc}
400 */
401 function cast_expr_to_string($expression)
402 {
403 return 'CAST(' . $expression . ' as VARCHAR(255))';
404 }
405
406 /**
407 * return sql error array
408 * @access private
409 */
410 function _sql_error()
411 {
412 // pg_last_error only works when there is an established connection.
413 // Connection errors have to be tracked by us manually.
414 if ($this->db_connect_id)
415 {
416 $message = @pg_last_error($this->db_connect_id);
417 }
418 else
419 {
420 $message = $this->connect_error;
421 }
422
423 return array(
424 'message' => $message,
425 'code' => ''
426 );
427 }
428
429 /**
430 * Close sql connection
431 * @access private
432 */
433 function _sql_close()
434 {
435 return @pg_close($this->db_connect_id);
436 }
437
438 /**
439 * Build db-specific report
440 * @access private
441 */
442 function _sql_report($mode, $query = '')
443 {
444 switch ($mode)
445 {
446 case 'start':
447
448 $explain_query = $query;
449 if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
450 {
451 $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
452 }
453 else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
454 {
455 $explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
456 }
457
458 if (preg_match('/^SELECT/', $explain_query))
459 {
460 $html_table = false;
461
462 if ($result = @pg_query($this->db_connect_id, "EXPLAIN $explain_query"))
463 {
464 while ($row = pg_fetch_assoc($result, null))
465 {
466 $html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
467 }
468 pg_free_result($result);
469 }
470
471 if ($html_table)
472 {
473 $this->html_hold .= '</table>';
474 }
475 }
476
477 break;
478
479 case 'fromcache':
480 $endtime = explode(' ', microtime());
481 $endtime = $endtime[0] + $endtime[1];
482
483 $result = @pg_query($this->db_connect_id, $query);
484 if ($result)
485 {
486 while ($void = pg_fetch_assoc($result, null))
487 {
488 // Take the time spent on parsing rows into account
489 }
490 pg_free_result($result);
491 }
492
493 $splittime = explode(' ', microtime());
494 $splittime = $splittime[0] + $splittime[1];
495
496 $this->sql_report('record_fromcache', $query, $endtime, $splittime);
497
498 break;
499 }
500 }
501 }
502