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325 lines
7.0 KiB
PHP
325 lines
7.0 KiB
PHP
<?php
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/**
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*
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* @package dbal
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* @version $Id$
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* @copyright (c) 2005 phpBB Group
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* @license http://opensource.org/licenses/gpl-license.php GNU Public License
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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('SQL_LAYER'))
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{
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define('SQL_LAYER', 'sqlite');
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include($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
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/**
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* @package dbal
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* Sqlite Database Abstraction Layer
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*/
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class dbal_sqlite extends dbal
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{
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function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false)
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{
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$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 = $database;
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$error = '';
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$this->db_connect_id = ($this->persistency) ? @sqlite_popen($this->server, 0666, $error) : @sqlite_open($this->server, 0666, $error);
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if ($this->db_connect_id)
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{
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@sqlite_query('PRAGMA short_column_names = 1', $this->db_connect_id);
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}
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return ($this->db_connect_id) ? true : array('message' => $error);
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}
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//
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// Other base methods
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//
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function sql_close()
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{
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if (!$this->db_connect_id)
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{
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return false;
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}
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return @sqlite_close($this->db_connect_id);
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}
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function sql_transaction($status = 'begin')
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{
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switch ($status)
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{
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case 'begin':
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$result = @sqlite_query('BEGIN', $this->db_connect_id);
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$this->transaction = true;
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break;
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case 'commit':
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$result = @sqlite_query('COMMIT', $this->db_connect_id);
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$this->transaction = false;
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if (!$result)
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{
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@sqlite_query('ROLLBACK', $this->db_connect_id);
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}
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break;
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case 'rollback':
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$result = @sqlite_query('ROLLBACK', $this->db_connect_id);
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$this->transaction = false;
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break;
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default:
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$result = true;
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}
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return $result;
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}
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// Base query method
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function sql_query($query = '', $cache_ttl = 0)
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{
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if ($query != '')
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{
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global $cache;
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$query = preg_replace('#FROM \((.*?)\)(,|[\n\r\t ]+?WHERE) #s', 'FROM \1\2 ', $query);
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// EXPLAIN only in extra debug mode
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if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('start', $query);
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}
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$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;
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if (!$this->query_result)
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{
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$this->num_queries++;
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if (($this->query_result = @sqlite_query($query, $this->db_connect_id)) === false)
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{
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$this->sql_error($query);
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}
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if (defined('DEBUG_EXTRA'))
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{
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$this->sql_report('stop', $query);
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}
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if ($cache_ttl && method_exists($cache, 'sql_save'))
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{
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$cache->sql_save($query, $this->query_result, $cache_ttl);
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}
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}
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else if (defined('DEBUG_EXTRA'))
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{
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$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) ? $this->query_result : false;
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}
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function sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
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{
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if ($query != '')
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{
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$this->query_result = false;
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// if $total is set to 0 we do not want to limit the number of rows
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if ($total == 0)
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{
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$total = -1;
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}
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$query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
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return $this->sql_query($query, $cache_ttl);
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}
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else
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{
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return false;
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}
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}
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// Other query methods
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//
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// NOTE :: Want to remove _ALL_ reliance on sql_numrows from core code ...
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// don't want this here by a middle Milestone
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function sql_numrows($query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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return ($query_id) ? @sqlite_num_rows($query_id) : false;
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}
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function sql_affectedrows()
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{
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return ($this->db_connect_id) ? @sqlite_changes($this->db_connect_id) : false;
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}
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function sql_fetchrow($query_id = false)
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{
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global $cache;
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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if (isset($cache->sql_rowset[$query_id]))
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{
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return $cache->sql_fetchrow($query_id);
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}
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return ($query_id) ? @sqlite_fetch_array($query_id, SQLITE_ASSOC) : false;
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}
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function sql_fetchrowset($query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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if ($query_id)
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{
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unset($this->rowset[$query_id]);
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unset($this->row[$query_id]);
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$result = array();
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while ($this->rowset[$query_id] = $this->sql_fetchrow($query_id))
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{
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$result[] = $this->rowset[$query_id];
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}
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return $result;
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}
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return false;
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}
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function sql_fetchfield($field, $rownum = -1, $query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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if ($query_id)
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{
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if ($rownum > -1)
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{
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$result = (@sqlite_seek($query_id, $rownum)) ? @sqlite_column($query_id, $field) : false;
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}
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else
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{
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$result = @sqlite_column($query_id, $field);
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}
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return $result;
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}
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return false;
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}
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function sql_rowseek($rownum, $query_id = false)
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{
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if (!$query_id)
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{
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$query_id = $this->query_result;
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}
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return ($query_id) ? @sqlite_seek($query_id, $rownum) : false;
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}
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function sql_nextid()
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{
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return ($this->db_connect_id) ? @sqlite_last_insert_rowid($this->db_connect_id) : false;
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}
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function sql_freeresult($query_id = false)
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{
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return true;
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}
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function sql_escape($msg)
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{
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return @sqlite_escape_string(stripslashes($msg));
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}
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function db_sql_error()
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{
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return array(
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'message' => @sqlite_error_string(@sqlite_last_error($this->db_connect_id)),
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'code' => @sqlite_last_error($this->db_connect_id)
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);
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}
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function _sql_report($mode, $query = '')
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{
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global $cache, $starttime, $phpbb_root_path;
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static $curtime, $query_hold, $html_hold;
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static $sql_report = '';
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static $cache_num_queries = 0;
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switch ($mode)
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{
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case 'start':
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$query_hold = $query;
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$html_hold = '';
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$curtime = explode(' ', microtime());
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$curtime = $curtime[0] + $curtime[1];
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break;
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case 'fromcache':
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$endtime = explode(' ', microtime());
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$endtime = $endtime[0] + $endtime[1];
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$result = @sqlite_query($query, $this->db_connect_id);
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while ($void = @sqlite_fetch_array($result, SQLITE_ASSOC))
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{
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// Take the time spent on parsing rows into account
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}
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$splittime = explode(' ', microtime());
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$splittime = $splittime[0] + $splittime[1];
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$time_cache = $endtime - $curtime;
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$time_db = $splittime - $endtime;
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$color = ($time_db > $time_cache) ? 'green' : 'red';
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$sql_report .= '<hr width="100%"/><br /><table class="bg" width="100%" cellspacing="1" cellpadding="4" border="0"><tr><th>Query results obtained from the cache</th></tr><tr><td class="row1"><textarea style="font-family:\'Courier New\',monospace;width:100%" rows="5">' . preg_replace('/\t(AND|OR)(\W)/', "\$1\$2", htmlspecialchars(preg_replace('/[\s]*[\n\r\t]+[\n\r\s\t]*/', "\n", $query))) . '</textarea></td></tr></table><p align="center">';
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$sql_report .= 'Before: ' . sprintf('%.5f', $curtime - $starttime) . 's | After: ' . sprintf('%.5f', $endtime - $starttime) . 's | Elapsed [cache]: <b style="color: ' . $color . '">' . sprintf('%.5f', ($time_cache)) . 's</b> | Elapsed [db]: <b>' . sprintf('%.5f', $time_db) . 's</b></p>';
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// Pad the start time to not interfere with page timing
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$starttime += $time_db;
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$cache_num_queries++;
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break;
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}
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}
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}
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} // if ... define
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?>
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