mirror of
https://github.com/phpbb/phpbb.git
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539 lines
12 KiB
PHP
539 lines
12 KiB
PHP
<?php
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/**
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*
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* @package dbal
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
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*
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*/
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/**
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* @ignore
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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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* Firebird/Interbase Database Abstraction Layer
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* Minimum Requirement is Firebird 2.1
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* @package dbal
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*/
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class phpbb_db_driver_firebird extends phpbb_db_driver
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{
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var $last_query_text = '';
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var $service_handle = false;
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var $affected_rows = 0;
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var $connect_error = '';
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/**
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* Connect to server
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*/
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
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{
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$this->persistency = $persistency;
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$this->user = $sqluser;
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$this->server = $sqlserver . (($port) ? ':' . $port : '');
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$this->dbname = str_replace('\\', '/', $database);
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// There are three possibilities to connect to an interbase db
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if (!$this->server)
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{
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$use_database = $this->dbname;
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}
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else if (strpos($this->server, '//') === 0)
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{
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$use_database = $this->server . $this->dbname;
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}
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else
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{
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$use_database = $this->server . ':' . $this->dbname;
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}
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if ($this->persistency)
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{
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if (!function_exists('ibase_pconnect'))
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{
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$this->connect_error = 'ibase_pconnect function does not exist, is interbase extension installed?';
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return $this->sql_error('');
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}
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$this->db_connect_id = @ibase_pconnect($use_database, $this->user, $sqlpassword, false, false, 3);
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}
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else
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{
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if (!function_exists('ibase_connect'))
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{
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$this->connect_error = 'ibase_connect function does not exist, is interbase extension installed?';
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return $this->sql_error('');
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}
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$this->db_connect_id = @ibase_connect($use_database, $this->user, $sqlpassword, false, false, 3);
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}
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// Do not call ibase_service_attach if connection failed,
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// otherwise error message from ibase_(p)connect call will be clobbered.
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if ($this->db_connect_id && function_exists('ibase_service_attach') && $this->server)
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{
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$this->service_handle = @ibase_service_attach($this->server, $this->user, $sqlpassword);
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}
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else
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{
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$this->service_handle = false;
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}
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return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
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}
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/**
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* Version information about used database
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* @param bool $raw if true, only return the fetched sql_server_version
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* @param bool $use_cache forced to false for Interbase
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* @return string sql server version
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*/
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function sql_server_info($raw = false, $use_cache = true)
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{
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/**
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* force $use_cache false. I didn't research why the caching code there is no caching code
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* but I assume its because the IB extension provides a direct method to access it
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* without a query.
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*/
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$use_cache = false;
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if ($this->service_handle !== false && function_exists('ibase_server_info'))
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{
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return @ibase_server_info($this->service_handle, IBASE_SVC_SERVER_VERSION);
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}
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return ($raw) ? '2.1' : 'Firebird/Interbase';
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}
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/**
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* SQL Transaction
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* @access private
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*/
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function _sql_transaction($status = 'begin')
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{
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switch ($status)
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{
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case 'begin':
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return true;
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break;
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case 'commit':
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return @ibase_commit();
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break;
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case 'rollback':
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return @ibase_rollback();
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break;
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}
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return true;
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}
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/**
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* Base query method
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*
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* @param string $query Contains the SQL query which shall be executed
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* @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
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* @return mixed When casted to bool the returned value returns true on success and false on failure
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*
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* @access public
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*/
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function sql_query($query = '', $cache_ttl = 0)
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{
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if ($query != '')
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{
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global $cache;
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// EXPLAIN only in extra debug mode
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if (defined('DEBUG'))
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{
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$this->sql_report('start', $query);
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}
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$this->last_query_text = $query;
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$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
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$this->sql_add_num_queries($this->query_result);
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if ($this->query_result === false)
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{
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$array = array();
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// We overcome Firebird's 32767 char limit by binding vars
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if (strlen($query) > 32767)
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{
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if (preg_match('/^(INSERT INTO[^(]++)\\(([^()]+)\\) VALUES[^(]++\\((.*?)\\)$/s', $query, $regs))
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{
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if (strlen($regs[3]) > 32767)
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{
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preg_match_all('/\'(?:[^\']++|\'\')*+\'|[\d-.]+/', $regs[3], $vals, PREG_PATTERN_ORDER);
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$inserts = $vals[0];
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unset($vals);
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foreach ($inserts as $key => $value)
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{
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if (!empty($value) && $value[0] === "'" && strlen($value) > 32769) // check to see if this thing is greater than the max + 'x2
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{
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$inserts[$key] = '?';
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$array[] = str_replace("''", "'", substr($value, 1, -1));
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}
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}
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$query = $regs[1] . '(' . $regs[2] . ') VALUES (' . implode(', ', $inserts) . ')';
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}
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}
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else if (preg_match('/^(UPDATE ([\\w_]++)\\s+SET )([\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|\\d+)(?:,\\s*[\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+))*+)\\s+(WHERE.*)$/s', $query, $data))
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{
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if (strlen($data[3]) > 32767)
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{
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$update = $data[1];
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$where = $data[4];
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preg_match_all('/(\\w++)\\s*=\\s*(\'(?:[^\']++|\'\')*+\'|[\d-.]++)/', $data[3], $temp, PREG_SET_ORDER);
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unset($data);
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$cols = array();
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foreach ($temp as $value)
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{
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if (!empty($value[2]) && $value[2][0] === "'" && strlen($value[2]) > 32769) // check to see if this thing is greater than the max + 'x2
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{
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$array[] = str_replace("''", "'", substr($value[2], 1, -1));
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$cols[] = $value[1] . '=?';
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}
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else
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{
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$cols[] = $value[1] . '=' . $value[2];
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}
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}
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$query = $update . implode(', ', $cols) . ' ' . $where;
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unset($cols);
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}
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}
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}
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if (!function_exists('ibase_affected_rows') && (preg_match('/^UPDATE ([\w_]++)\s+SET [\w_]++\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+)(?:,\s*[\w_]++\s*=\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+))*+\s+(WHERE.*)?$/s', $query, $regs) || preg_match('/^DELETE FROM ([\w_]++)\s*(WHERE\s*.*)?$/s', $query, $regs)))
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{
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$affected_sql = 'SELECT COUNT(*) as num_rows_affected FROM ' . $regs[1];
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if (!empty($regs[2]))
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{
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$affected_sql .= ' ' . $regs[2];
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}
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if (!($temp_q_id = @ibase_query($this->db_connect_id, $affected_sql)))
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{
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return false;
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}
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$temp_result = @ibase_fetch_assoc($temp_q_id);
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@ibase_free_result($temp_q_id);
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$this->affected_rows = ($temp_result) ? $temp_result['NUM_ROWS_AFFECTED'] : false;
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}
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if (sizeof($array))
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{
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$p_query = @ibase_prepare($this->db_connect_id, $query);
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array_unshift($array, $p_query);
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$this->query_result = call_user_func_array('ibase_execute', $array);
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unset($array);
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if ($this->query_result === false)
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{
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$this->sql_error($query);
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}
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}
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else if (($this->query_result = @ibase_query($this->db_connect_id, $query)) === false)
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{
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$this->sql_error($query);
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}
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if (defined('DEBUG'))
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{
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$this->sql_report('stop', $query);
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}
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if (!$this->transaction)
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{
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if (function_exists('ibase_commit_ret'))
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{
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@ibase_commit_ret();
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}
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else
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{
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// way cooler than ibase_commit_ret :D
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@ibase_query('COMMIT RETAIN;');
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}
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}
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if ($cache && $cache_ttl)
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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$this->query_result = $cache->sql_save($this, $query, $this->query_result, $cache_ttl);
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}
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else if (strpos($query, 'SELECT') === 0 && $this->query_result)
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{
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$this->open_queries[(int) $this->query_result] = $this->query_result;
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}
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}
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else if (defined('DEBUG'))
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{
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$this->sql_report('fromcache', $query);
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}
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}
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else
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{
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return false;
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}
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return $this->query_result;
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}
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/**
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* Build LIMIT query
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*/
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function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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{
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$this->query_result = false;
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$query = 'SELECT FIRST ' . $total . ((!empty($offset)) ? ' SKIP ' . $offset : '') . substr($query, 6);
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return $this->sql_query($query, $cache_ttl);
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}
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/**
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* Return number of affected rows
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*/
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function sql_affectedrows()
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{
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// PHP 5+ function
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if (function_exists('ibase_affected_rows'))
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{
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return ($this->db_connect_id) ? @ibase_affected_rows($this->db_connect_id) : false;
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}
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else
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{
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return $this->affected_rows;
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}
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}
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/**
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* Fetch current row
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*/
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function sql_fetchrow($query_id = false)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if ($cache && $cache->sql_exists($query_id))
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{
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return $cache->sql_fetchrow($query_id);
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}
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if ($query_id === false)
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{
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return false;
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}
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$row = array();
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$cur_row = @ibase_fetch_object($query_id, IBASE_TEXT);
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if (!$cur_row)
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{
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return false;
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}
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foreach (get_object_vars($cur_row) as $key => $value)
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{
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$row[strtolower($key)] = (is_string($value)) ? trim(str_replace(array("\\0", "\\n"), array("\0", "\n"), $value)) : $value;
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}
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return (sizeof($row)) ? $row : false;
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}
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/**
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* Get last inserted id after insert statement
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*/
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function sql_nextid()
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{
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$query_id = $this->query_result;
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if ($query_id !== false && $this->last_query_text != '')
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{
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if ($this->query_result && preg_match('#^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)#i', $this->last_query_text, $tablename))
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{
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$sql = 'SELECT GEN_ID(' . $tablename[1] . '_gen, 0) AS new_id FROM RDB$DATABASE';
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if (!($temp_q_id = @ibase_query($this->db_connect_id, $sql)))
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{
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return false;
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}
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$temp_result = @ibase_fetch_assoc($temp_q_id);
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@ibase_free_result($temp_q_id);
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return ($temp_result) ? $temp_result['NEW_ID'] : false;
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}
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}
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return false;
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}
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/**
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* Free sql result
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*/
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function sql_freeresult($query_id = false)
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{
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global $cache;
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if ($query_id === false)
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{
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$query_id = $this->query_result;
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}
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if ($cache && $cache->sql_exists($query_id))
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{
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return $cache->sql_freeresult($query_id);
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}
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if (isset($this->open_queries[(int) $query_id]))
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{
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unset($this->open_queries[(int) $query_id]);
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return @ibase_free_result($query_id);
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}
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return false;
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}
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/**
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* Escape string used in sql query
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*/
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function sql_escape($msg)
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{
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return str_replace(array("'", "\0"), array("''", ''), $msg);
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}
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/**
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* Build LIKE expression
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* @access private
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*/
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function _sql_like_expression($expression)
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{
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return $expression . " ESCAPE '\\'";
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}
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/**
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* Build db-specific query data
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* @access private
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*/
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function _sql_custom_build($stage, $data)
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{
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return $data;
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}
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function _sql_bit_and($column_name, $bit, $compare = '')
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{
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return 'BIN_AND(' . $column_name . ', ' . (1 << $bit) . ')' . (($compare) ? ' ' . $compare : '');
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}
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function _sql_bit_or($column_name, $bit, $compare = '')
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{
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return 'BIN_OR(' . $column_name . ', ' . (1 << $bit) . ')' . (($compare) ? ' ' . $compare : '');
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}
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/**
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* @inheritdoc
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*/
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function cast_expr_to_bigint($expression)
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{
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// Precision must be from 1 to 18
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return 'CAST(' . $expression . ' as DECIMAL(18, 0))';
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}
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/**
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* @inheritdoc
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*/
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function cast_expr_to_string($expression)
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{
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return 'CAST(' . $expression . ' as VARCHAR(255))';
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}
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/**
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* return sql error array
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* @access private
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*/
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function _sql_error()
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{
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// Need special handling here because ibase_errmsg returns
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// connection errors, however if the interbase extension
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// is not installed then ibase_errmsg does not exist and
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// we cannot call it.
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if (function_exists('ibase_errmsg'))
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{
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$msg = @ibase_errmsg();
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if (!$msg)
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{
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$msg = $this->connect_error;
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}
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}
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else
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{
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$msg = $this->connect_error;
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}
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return array(
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'message' => $msg,
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'code' => (@function_exists('ibase_errcode') ? @ibase_errcode() : '')
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);
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}
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/**
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* Close sql connection
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* @access private
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*/
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function _sql_close()
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{
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if ($this->service_handle !== false)
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{
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@ibase_service_detach($this->service_handle);
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}
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return @ibase_close($this->db_connect_id);
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}
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/**
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* Build db-specific report
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* @access private
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*/
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function _sql_report($mode, $query = '')
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{
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switch ($mode)
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{
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case 'start':
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break;
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case 'fromcache':
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$endtime = explode(' ', microtime());
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$endtime = $endtime[0] + $endtime[1];
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$result = @ibase_query($this->db_connect_id, $query);
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while ($void = @ibase_fetch_object($result, IBASE_TEXT))
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{
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// Take the time spent on parsing rows into account
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}
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@ibase_free_result($result);
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$splittime = explode(' ', microtime());
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$splittime = $splittime[0] + $splittime[1];
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$this->sql_report('record_fromcache', $query, $endtime, $splittime);
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break;
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}
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}
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}
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