4 +-----------------------------------------------------------------------+
5 | program/include/rcube_mdb2.php |
7 | This file is part of the RoundCube Webmail client |
8 | Copyright (C) 2005-2009, RoundCube Dev. - Switzerland |
9 | Licensed under the GNU GPL |
12 | PEAR:DB wrapper class that implements PEAR MDB2 functions |
13 | See http://pear.php.net/package/MDB2 |
15 +-----------------------------------------------------------------------+
16 | Author: Lukas Kahwe Smith <smith@pooteeweet.org> |
17 +-----------------------------------------------------------------------+
19 $Id: rcube_mdb2.php 2237 2009-01-17 01:55:39Z till $
25 * Database independent query interface
27 * This is a wrapper for the PEAR::MDB2 class
30 * @author David Saez Padros <david@ols.es>
31 * @author Thomas Bruederli <roundcube@gmail.com>
32 * @author Lukas Kahwe Smith <smith@pooteeweet.org>
34 * @link http://pear.php.net/package/MDB2
38 var $db_dsnw; // DSN for write operations
39 var $db_dsnr; // DSN for read operations
40 var $db_connected = false; // Already connected ?
41 var $db_mode = ''; // Connection mode
42 var $db_handle = 0; // Connection handle
43 var $db_error = false;
44 var $db_error_msg = '';
45 var $debug_mode = false;
47 var $a_query_results = array('dummy');
54 * @param string DSN for read/write operations
55 * @param string Optional DSN for read only operations
57 function __construct($db_dsnw, $db_dsnr='', $pconn=false)
62 $this->db_dsnw = $db_dsnw;
63 $this->db_dsnr = $db_dsnr;
64 $this->db_pconn = $pconn;
66 $dsn_array = MDB2::parseDSN($db_dsnw);
67 $this->db_provider = $dsn_array['phptype'];
72 * Connect to specific database
74 * @param string DSN for DB connections
75 * @return object PEAR database handle
78 function dsn_connect($dsn)
80 // Use persistent connections if available
82 'persistent' => $this->db_pconn,
83 'emulate_prepared' => $this->debug_mode,
84 'debug' => $this->debug_mode,
85 'debug_handler' => 'mdb2_debug_handler',
86 'portability' => MDB2_PORTABILITY_ALL ^ MDB2_PORTABILITY_EMPTY_TO_NULL);
88 if ($this->db_provider == 'pgsql') {
89 $db_options['disable_smart_seqname'] = true;
90 $db_options['seqname_format'] = '%s';
93 $dbh = MDB2::connect($dsn, $db_options);
95 if (MDB2::isError($dbh))
97 $this->db_error = TRUE;
98 $this->db_error_msg = $dbh->getMessage();
100 raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__,
101 'file' => __FILE__, 'message' => $dbh->getUserInfo()), TRUE, FALSE);
103 else if ($this->db_provider=='sqlite')
105 $dsn_array = MDB2::parseDSN($dsn);
106 if (!filesize($dsn_array['database']) && !empty($this->sqlite_initials))
107 $this->_sqlite_create_database($dbh, $this->sqlite_initials);
110 $dbh->setCharset('utf8');
117 * Connect to appropiate databse
118 * depending on the operation
120 * @param string Connection mode (r|w)
123 function db_connect($mode)
125 $this->db_mode = $mode;
128 if ($this->db_connected)
130 // no replication, current connection is ok
131 if ($this->db_dsnw==$this->db_dsnr)
134 // connected to master, current connection is ok
135 if ($this->db_mode=='w')
138 // Same mode, current connection is ok
139 if ($this->db_mode==$mode)
144 $dsn = $this->db_dsnr;
146 $dsn = $this->db_dsnw;
148 $this->db_handle = $this->dsn_connect($dsn);
149 $this->db_connected = true;
154 * Activate/deactivate debug mode
156 * @param boolean True if SQL queries should be logged
158 function set_debug($dbg = true)
160 $this->debug_mode = $dbg;
161 if ($this->db_connected)
163 $this->db_handle->setOption('debug', $dbg);
164 $this->db_handle->setOption('emulate_prepared', $dbg);
170 * Getter for error state
172 * @param boolean True on error
176 return $this->db_error ? $this->db_error_msg : FALSE;
181 * Execute a SQL query
183 * @param string SQL query to execute
184 * @param mixed Values to be inserted in query
185 * @return number Query handle identifier
190 $params = func_get_args();
191 $query = array_shift($params);
193 return $this->_query($query, 0, 0, $params);
198 * Execute a SQL query with limits
200 * @param string SQL query to execute
201 * @param number Offset for LIMIT statement
202 * @param number Number of rows for LIMIT statement
203 * @param mixed Values to be inserted in query
204 * @return number Query handle identifier
207 function limitquery()
209 $params = func_get_args();
210 $query = array_shift($params);
211 $offset = array_shift($params);
212 $numrows = array_shift($params);
214 return $this->_query($query, $offset, $numrows, $params);
219 * Execute a SQL query with limits
221 * @param string SQL query to execute
222 * @param number Offset for LIMIT statement
223 * @param number Number of rows for LIMIT statement
224 * @param array Values to be inserted in query
225 * @return number Query handle identifier
228 function _query($query, $offset, $numrows, $params)
231 if (strtolower(trim(substr($query,0,6)))=='select')
236 $this->db_connect($mode);
238 if ($this->db_provider == 'sqlite')
239 $this->_sqlite_prepare();
241 if ($numrows || $offset)
242 $result = $this->db_handle->setLimit($numrows,$offset);
245 $result = $this->db_handle->query($query);
248 $params = (array)$params;
249 $q = $this->db_handle->prepare($query);
250 if ($this->db_handle->isError($q))
252 $this->db_error = TRUE;
253 $this->db_error_msg = $q->userinfo;
255 raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
256 'message' => $this->db_error_msg), TRUE, TRUE);
260 $result = $q->execute($params);
265 // add result, even if it's an error
266 return $this->_add_result($result);
271 * Get number of rows for a SQL query
272 * If no query handle is specified, the last query will be taken as reference
274 * @param number Optional query handle identifier
275 * @return mixed Number of rows or FALSE on failure
278 function num_rows($res_id=NULL)
280 if (!$this->db_handle)
283 if ($result = $this->_get_result($res_id))
284 return $result->numRows();
291 * Get number of affected rows for the last query
293 * @param number Optional query handle identifier
294 * @return mixed Number of rows or FALSE on failure
297 function affected_rows($res_id = null)
299 if (!$this->db_handle)
302 return (int) $this->_get_result($res_id);
307 * Get last inserted record ID
308 * For Postgres databases, a sequence name is required
310 * @param string Sequence name for increment
311 * @return mixed ID or FALSE on failure
314 function insert_id($sequence = '')
316 if (!$this->db_handle || $this->db_mode=='r')
319 return $this->db_handle->lastInsertID($sequence);
324 * Get an associative array for one row
325 * If no query handle is specified, the last query will be taken as reference
327 * @param number Optional query handle identifier
328 * @return mixed Array with col values or FALSE on failure
331 function fetch_assoc($res_id=NULL)
333 $result = $this->_get_result($res_id);
334 return $this->_fetch_row($result, MDB2_FETCHMODE_ASSOC);
339 * Get an index array for one row
340 * If no query handle is specified, the last query will be taken as reference
342 * @param number Optional query handle identifier
343 * @return mixed Array with col values or FALSE on failure
346 function fetch_array($res_id=NULL)
348 $result = $this->_get_result($res_id);
349 return $this->_fetch_row($result, MDB2_FETCHMODE_ORDERED);
354 * Get col values for a result row
356 * @param object Query result handle
357 * @param number Fetch mode identifier
358 * @return mixed Array with col values or FALSE on failure
361 function _fetch_row($result, $mode)
363 if ($result === FALSE || PEAR::isError($result))
366 return $result->fetchRow($mode);
371 * Formats input so it can be safely used in a query
373 * @param mixed Value to quote
374 * @return string Quoted/converted string for use in query
377 function quote($input, $type = null)
379 // create DB handle if not available
380 if (!$this->db_handle)
381 $this->db_connect('r');
383 // escape pear identifier chars
384 $rep_chars = array('?' => '\?',
388 return $this->db_handle->quote($input, $type);
393 * Quotes a string so it can be safely used as a table or column name
395 * @param string Value to quote
396 * @return string Quoted string for use in query
397 * @deprecated Replaced by rcube_MDB2::quote_identifier
398 * @see rcube_mdb2::quote_identifier
401 function quoteIdentifier($str)
403 return $this->quote_identifier($str);
408 * Quotes a string so it can be safely used as a table or column name
410 * @param string Value to quote
411 * @return string Quoted string for use in query
414 function quote_identifier($str)
416 if (!$this->db_handle)
417 $this->db_connect('r');
419 return $this->db_handle->quoteIdentifier($str);
425 * @param string The string to be escaped
426 * @return string The escaped string
430 function escapeSimple($str)
432 if (!$this->db_handle)
433 $this->db_connect('r');
435 return $this->db_handle->escape($str);
440 * Return SQL function for current time and date
442 * @return string SQL function to use in query
447 switch($this->db_provider)
459 * Return SQL statement to convert a field value into a unix timestamp
461 * @param string Field name
462 * @return string SQL statement to use in query
465 function unixtimestamp($field)
467 switch($this->db_provider)
470 return "EXTRACT (EPOCH FROM $field)";
474 return "datediff(s, '1970-01-01 00:00:00', $field)";
477 return "UNIX_TIMESTAMP($field)";
483 * Return SQL statement to convert from a unix timestamp
485 * @param string Field name
486 * @return string SQL statement to use in query
489 function fromunixtime($timestamp)
491 switch($this->db_provider)
496 return sprintf("FROM_UNIXTIME(%d)", $timestamp);
499 return date("'Y-m-d H:i:s'", $timestamp);
505 * Return SQL statement for case insensitive LIKE
507 * @param string Field name
508 * @param string Search value
509 * @return string SQL statement to use in query
512 function ilike($column, $value)
514 // TODO: use MDB2's matchPattern() function
515 switch($this->db_provider)
518 return $this->quote_identifier($column).' ILIKE '.$this->quote($value);
520 return $this->quote_identifier($column).' LIKE '.$this->quote($value);
526 * Adds a query result and returns a handle ID
528 * @param object Query handle
529 * @return mixed Handle ID
532 function _add_result($res)
535 if (PEAR::isError($res))
537 $this->db_error = TRUE;
538 $this->db_error_msg = $res->getMessage();
539 raise_error(array('code' => 500, 'type' => 'db', 'line' => __LINE__, 'file' => __FILE__,
540 'message' => $res->getMessage() . " Query: "
541 . substr(preg_replace('/[\r\n]+\s*/', ' ', $res->userinfo), 0, 512)),
545 $res_id = sizeof($this->a_query_results);
546 $this->last_res_id = $res_id;
547 $this->a_query_results[$res_id] = $res;
553 * Resolves a given handle ID and returns the according query handle
554 * If no ID is specified, the last resource handle will be returned
556 * @param number Handle ID
557 * @return mixed Resource handle or FALSE on failure
560 function _get_result($res_id=NULL)
563 $res_id = $this->last_res_id;
565 if (isset($this->a_query_results[$res_id]))
566 if (!PEAR::isError($this->a_query_results[$res_id]))
567 return $this->a_query_results[$res_id];
574 * Create a sqlite database from a file
576 * @param object SQLite database handle
577 * @param string File path to use for DB creation
580 function _sqlite_create_database($dbh, $file_name)
582 if (empty($file_name) || !is_string($file_name))
585 $data = file_get_contents($file_name);
588 sqlite_exec($dbh->connection, $data);
593 * Add some proprietary database functions to the current SQLite handle
594 * in order to make it MySQL compatible
598 function _sqlite_prepare()
600 include_once('include/rcube_sqlite.inc');
602 // we emulate via callback some missing MySQL function
603 sqlite_create_function($this->db_handle->connection, "from_unixtime", "rcube_sqlite_from_unixtime");
604 sqlite_create_function($this->db_handle->connection, "unix_timestamp", "rcube_sqlite_unix_timestamp");
605 sqlite_create_function($this->db_handle->connection, "now", "rcube_sqlite_now");
606 sqlite_create_function($this->db_handle->connection, "md5", "rcube_sqlite_md5");
610 } // end class rcube_db
613 /* this is our own debug handler for the MDB2 connection */
614 function mdb2_debug_handler(&$db, $scope, $message, $context = array())
616 if ($scope != 'prepare')
618 $debug_output = $scope . '('.$db->db_index.'): ';
619 $debug_output .= $message . $db->getOption('log_line_break');
620 write_log('sqllog', $debug_output);