<?php
/**
*
* @package dbal
* @version $Id: firebird.php 8967 2008-10-02 12:04:12Z acydburn $
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
include_once($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
/**
* Firebird/Interbase Database Abstraction Layer
* Minimum Requirement is Firebird 2.0
* @package dbal
*/
class dbal_firebird extends dbal
{
var $last_query_text = '';
var $service_handle = false;
var $affected_rows = 0;
/**
* Connect to server
*/
function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
{
$this->persistency = $persistency;
$this->user = $sqluser;
$this->server = $sqlserver . (($port) ? ':' . $port : '');
$this->dbname = str_replace('\\', '/', $database);
// There are three possibilities to connect to an interbase db
if (!$this->server)
{
$use_database = $this->dbname;
}
else if (strpos($this->server, '//') === 0)
{
$use_database = $this->server . $this->dbname;
}
else
{
$use_database = $this->server . ':' . $this->dbname;
}
$this->db_connect_id = ($this->persistency) ? @ibase_pconnect($use_database, $this->user, $sqlpassword, false, false, 3) : @ibase_connect($use_database, $this->user, $sqlpassword, false, false, 3);
$this->service_handle = (function_exists('ibase_service_attach') && $this->server) ? @ibase_service_attach($this->server, $this->user, $sqlpassword) : false;
return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
}
/**
* Version information about used database
* @param bool $raw if true, only return the fetched sql_server_version
* @return string sql server version
*/
function sql_server_info($raw = false)
{
if ($this->service_handle !== false && function_exists('ibase_server_info'))
{
return @ibase_server_info($this->service_handle, IBASE_SVC_SERVER_VERSION);
}
return ($raw) ? '2.0' : 'Firebird/Interbase';
}
/**
* SQL Transaction
* @access private
*/
function _sql_transaction($status = 'begin')
{
switch ($status)
{
case 'begin':
return true;
break;
case 'commit':
return @ibase_commit();
break;
case 'rollback':
return @ibase_rollback();
break;
}
return true;
}
/**
* Base query method
*
* @param string $query Contains the SQL query which shall be executed
* @param int $cache_ttl Either 0 to avoid caching or the time in seconds which the result shall be kept in cache
* @return mixed When casted to bool the returned value returns true on success and false on failure
*
* @access public
*/
function sql_query($query = '', $cache_ttl = 0)
{
if ($query != '')
{
global $cache;
// EXPLAIN only in extra debug mode
if (defined('DEBUG_EXTRA'))
{
$this->sql_report('start', $query);
}
$this->last_query_text = $query;
$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
$this->sql_add_num_queries($this->query_result);
if ($this->query_result === false)
{
$array = array();
// We overcome Firebird's 32767 char limit by binding vars
if (strlen($query) > 32767)
{
if (preg_match('/^(INSERT INTO[^(]++)\\(([^()]+)\\) VALUES[^(]++\\((.*?)\\)$/s', $query, $regs))
{
if (strlen($regs[3]) > 32767)
{
preg_match_all('/\'(?:[^\']++|\'\')*+\'|[\d-.]+/', $regs[3], $vals, PREG_PATTERN_ORDER);
$inserts = $vals[0];
unset($vals);
foreach ($inserts as $key => $value)
{
if (!empty($value) && $value[0] === "'" && strlen($value) > 32769) // check to see if this thing is greater than the max + 'x2
{
$inserts[$key] = '?';
$array[] = str_replace("''", "'", substr($value, 1, -1));
}
}
$query = $regs[1] . '(' . $regs[2] . ') VALUES (' . implode(', ', $inserts) . ')';
}
}
else if (preg_match('/^(UPDATE ([\\w_]++)\\s+SET )([\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|\\d+)(?:,\\s*[\\w_]++\\s*=\\s*(?:\'(?:[^\']++|\'\')*+\'|[\d-.]+))*+)\\s+(WHERE.*)$/s', $query, $data))
{
if (strlen($data[3]) > 32767)
{
$update = $data[1];
$where = $data[4];
preg_match_all('/(\\w++)\\s*=\\s*(\'(?:[^\']++|\'\')*+\'|[\d-.]++)/', $data[3], $temp, PREG_SET_ORDER);
unset($data);
$cols = array();
foreach ($temp as $value)
{
if (!empty($value[2]) && $value[2][0] === "'" && strlen($value[2]) > 32769) // check to see if this thing is greater than the max + 'x2
{
$array[] = str_replace("''", "'", substr($value[2], 1, -1));
$cols[] = $value[1] . '=?';
}
else
{
$cols[] = $value[1] . '=' . $value[2];
}
}
$query = $update . implode(', ', $cols) . ' ' . $where;
unset($cols);
}
}
}
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)))
{
$affected_sql = 'SELECT COUNT(*) as num_rows_affected FROM ' . $regs[1];
if (!empty($regs[2]))
{
$affected_sql .= ' ' . $regs[2];
}
if (!($temp_q_id = @ibase_query($this->db_connect_id, $affected_sql)))
{
return false;
}
$temp_result = @ibase_fetch_assoc($temp_q_id);
@ibase_free_result($temp_q_id);
$this->affected_rows = ($temp_result) ? $temp_result['NUM_ROWS_AFFECTED'] : false;
}
if (sizeof($array))
{
$p_query = @ibase_prepare($this->db_connect_id, $query);
array_unshift($array, $p_query);
$this->query_result = call_user_func_array('ibase_execute', $array);
unset($array);
if ($this->query_result === false)
{
$this->sql_error($query);
}
}
else if (($this->query_result = @ibase_query($this->db_connect_id, $query)) === false)
{
$this->sql_error($query);
}
if (defined('DEBUG_EXTRA'))
{
$this->sql_report('stop', $query);
}
if (!$this->transaction)
{
if (function_exists('ibase_commit_ret'))
{
@ibase_commit_ret();
}
else
{
// way cooler than ibase_commit_ret :D
@ibase_query('COMMIT RETAIN;');
}
}
if ($cache_ttl && method_exists($cache, 'sql_save'))
{
$this->open_queries[(int) $this->query_result] = $this->query_result;
$cache->sql_save($query, $this->query_result, $cache_ttl);
}
else if (strpos($query, 'SELECT') === 0 && $this->query_result)
{
$this->open_queries[(int) $this->query_result] = $this->query_result;
}
}
else if (defined('DEBUG_EXTRA'))
{
$this->sql_report('fromcache', $query);
}
}
else
{
return false;
}
return $this->query_result;
}
/**
* Build LIMIT query
*/
function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
{
$this->query_result = false;
$query = 'SELECT FIRST ' . $total . ((!empty($offset)) ? ' SKIP ' . $offset : '') . substr($query, 6);
return $this->sql_query($query, $cache_ttl);
}
/**
* Return number of affected rows
*/
function sql_affectedrows()
{
// PHP 5+ function
if (function_exists('ibase_affected_rows'))
{
return ($this->db_connect_id) ? @ibase_affected_rows($this->db_connect_id) : false;
}
else
{
return $this->affected_rows;
}
}
/**
* Fetch current row
*/
function sql_fetchrow($query_id = false)
{
global $cache;
if ($query_id === false)
{
$query_id = $this->query_result;
}
if (isset($cache->sql_rowset[$query_id]))
{
return $cache->sql_fetchrow($query_id);
}
if ($query_id === false)
{
return false;
}
$row = array();
$cur_row = @ibase_fetch_object($query_id, IBASE_TEXT);
if (!$cur_row)
{
return false;
}
foreach (get_object_vars($cur_row) as $key => $value)
{
$row[strtolower($key)] = (is_string($value)) ? trim(str_replace(array("\\0", "\\n"), array("\0", "\n"), $value)) : $value;
}
return (sizeof($row)) ? $row : false;
}
/**
* Seek to given row number
* rownum is zero-based
*/
function sql_rowseek($rownum, &$query_id)
{
global $cache;
if ($query_id === false)
{
$query_id = $this->query_result;
}
if (isset($cache->sql_rowset[$query_id]))
{
return $cache->sql_rowseek($rownum, $query_id);
}
if ($query_id === false)
{
return;
}
$this->sql_freeresult($query_id);
$query_id = $this->sql_query($this->last_query_text);
if ($query_id === false)
{
return false;
}
// We do not fetch the row for rownum == 0 because then the next resultset would be the second row
for ($i = 0; $i < $rownum; $i++)
{
if (!$this->sql_fetchrow($query_id))
{
return false;
}
}
return true;
}
/**
* Get last inserted id after insert statement
*/
function sql_nextid()
{
$query_id = $this->query_result;
if ($query_id !== false && $this->last_query_text != '')
{
if ($this->query_result && preg_match('#^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)#i', $this->last_query_text, $tablename))
{
$sql = 'SELECT GEN_ID(' . $tablename[1] . '_gen, 0) AS new_id FROM RDB$DATABASE';
if (!($temp_q_id = @ibase_query($this->db_connect_id, $sql)))
{
return false;
}
$temp_result = @ibase_fetch_assoc($temp_q_id);
@ibase_free_result($temp_q_id);
return ($temp_result) ? $temp_result['NEW_ID'] : false;
}
}
return false;
}
/**
* Free sql result
*/
function sql_freeresult($query_id = false)
{
global $cache;
if ($query_id === false)
{
$query_id = $this->query_result;
}
if (isset($cache->sql_rowset[$query_id]))
{
return $cache->sql_freeresult($query_id);
}
if (isset($this->open_queries[(int) $query_id]))
{
unset($this->open_queries[(int) $query_id]);
return @ibase_free_result($query_id);
}
return false;
}
/**
* Escape string used in sql query
*/
function sql_escape($msg)
{
return str_replace(array("'", "\0"), array("''", ''), $msg);
}
/**
* Build LIKE expression
* @access private
*/
function _sql_like_expression($expression)
{
return $expression . " ESCAPE '\\'";
}
/**
* Build db-specific query data
* @access private
*/
function _sql_custom_build($stage, $data)
{
return $data;
}
/**
* return sql error array
* @access private
*/
function _sql_error()
{
return array(
'message' => @ibase_errmsg(),
'code' => (@function_exists('ibase_errcode') ? @ibase_errcode() : '')
);
}
/**
* Close sql connection
* @access private
*/
function _sql_close()
{
if ($this->service_handle !== false)
{
@ibase_service_detach($this->service_handle);
}
return @ibase_close($this->db_connect_id);
}
/**
* Build db-specific report
* @access private
*/
function _sql_report($mode, $query = '')
{
switch ($mode)
{
case 'start':
break;
case 'fromcache':
$endtime = explode(' ', microtime());
$endtime = $endtime[0] + $endtime[1];
$result = @ibase_query($this->db_connect_id, $query);
while ($void = @ibase_fetch_object($result, IBASE_TEXT))
{
// Take the time spent on parsing rows into account
}
@ibase_free_result($result);
$splittime = explode(' ', microtime());
$splittime = $splittime[0] + $splittime[1];
$this->sql_report('record_fromcache', $query, $endtime, $splittime);
break;
}
}
}
?>