<?php
/**
*
* @package dbal
* @version $Id$
* @copyright (c) 2005 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/
/**
* @ignore
*/
if (!defined('IN_PHPBB'))
{
exit;
}
/**
* Sqlite Database Abstraction Layer
* Minimum Requirement: 2.8.2+
* @package dbal
*/
class phpbb_dbal_sqlite extends phpbb_dbal
{
/**
* @var string Database type. No distinction between versions or used extensions.
*/
public $dbms_type = 'sqlite';
/**
* Database features
*
* <ul>
* <li>multi_insert: Supports multi inserts</li>
* <li>count_distinct: Supports COUNT(DISTINGT ...)</li>
* <li>multi_table_deletion: Supports multiple table deletion</li>
* <li>truncate: Supports table truncation</li>
* </ul>
*
* @var array
*/
public $features = array(
'multi_insert' => true,
// like MS ACCESS, SQLite does not support COUNT(DISTINCT ...)
'count_distinct' => false,
'multi_table_deletion' => true,
// can't truncate a table
'truncate' => false,
);
/**
* @var array Database type map, column layout information
*/
public $dbms_type_map = array(
'INT:' => 'int(%d)',
'BINT' => 'bigint(20)',
'UINT' => 'INTEGER UNSIGNED', //'mediumint(8) UNSIGNED',
'UINT:' => 'INTEGER UNSIGNED', // 'int(%d) UNSIGNED',
'TINT:' => 'tinyint(%d)',
'USINT' => 'INTEGER UNSIGNED', //'mediumint(4) UNSIGNED',
'BOOL' => 'INTEGER UNSIGNED', //'tinyint(1) UNSIGNED',
'VCHAR' => 'varchar(255)',
'VCHAR:' => 'varchar(%d)',
'CHAR:' => 'char(%d)',
'XSTEXT' => 'text(65535)',
'STEXT' => 'text(65535)',
'TEXT' => 'text(65535)',
'MTEXT' => 'mediumtext(16777215)',
'XSTEXT_UNI'=> 'text(65535)',
'STEXT_UNI' => 'text(65535)',
'TEXT_UNI' => 'text(65535)',
'MTEXT_UNI' => 'mediumtext(16777215)',
'TIMESTAMP' => 'INTEGER UNSIGNED', //'int(11) UNSIGNED',
'DECIMAL' => 'decimal(5,2)',
'DECIMAL:' => 'decimal(%d,2)',
'PDECIMAL' => 'decimal(6,3)',
'PDECIMAL:' => 'decimal(%d,3)',
'VCHAR_UNI' => 'varchar(255)',
'VCHAR_UNI:'=> 'varchar(%d)',
'VARBINARY' => 'blob',
);
/**
* Connect to server. See {@link phpbb_dbal::sql_connect() sql_connect()} for details.
*/
public function sql_connect($server, $user, $password, $database, $port = false, $persistency = false , $new_link = false)
{
$this->persistency = $persistency;
$this->user = $user;
$this->server = $server . (($port) ? ':' . $port : '');
$this->dbname = $database;
$error = '';
$this->db_connect_id = ($this->persistency) ? @sqlite_popen($this->server, 0666, $error) : @sqlite_open($this->server, 0666, $error);
if ($this->db_connect_id)
{
@sqlite_query('PRAGMA short_column_names = 1', $this->db_connect_id);
@sqlite_query('PRAGMA encoding = "UTF-8"', $this->db_connect_id);
}
return ($this->db_connect_id) ? true : array('message' => $error);
}
/**
* Version information about used database. See {@link phpbb_dbal::sql_server_info() sql_server_info()} for details.
*/
public function sql_server_info($raw = false)
{
if (!phpbb::registered('acm') || ($this->sql_server_version = phpbb::$acm->get('#sqlite_version')) === false)
{
$result = @sqlite_query('SELECT sqlite_version() AS version', $this->db_connect_id);
$row = @sqlite_fetch_array($result, SQLITE_ASSOC);
$this->sql_server_version = (!empty($row['version'])) ? $row['version'] : 0;
if (phpbb::registered('acm'))
{
phpbb::$acm->put('#sqlite_version', $this->sql_server_version);
}
}
return ($raw) ? $this->sql_server_version : 'SQLite ' . $this->sql_server_version;
}
/**
* DB-specific base query method. See {@link phpbb_dbal::_sql_query() _sql_query()} for details.
*/
protected function _sql_query($query)
{
return @sqlite_query($query, $this->db_connect_id);
}
/**
* Build LIMIT query and run it. See {@link phpbb_dbal::_sql_query_limit() _sql_query_limit()} for details.
*/
protected function _sql_query_limit($query, $total, $offset, $cache_ttl)
{
// if $total is set to 0 we do not want to limit the number of rows
if ($total == 0)
{
$total = -1;
}
$query .= "\n LIMIT " . ((!empty($offset)) ? $offset . ', ' . $total : $total);
return $this->sql_query($query, $cache_ttl);
}
/**
* Close sql connection. See {@link phpbb_dbal::_sql_close() _sql_close()} for details.
*/
protected function _sql_close()
{
return @sqlite_close($this->db_connect_id);
}
/**
* SQL Transaction. See {@link phpbb_dbal::_sql_transaction() _sql_transaction()} for details.
*/
protected function _sql_transaction($status)
{
switch ($status)
{
case 'begin':
return @sqlite_query('BEGIN', $this->db_connect_id);
break;
case 'commit':
return @sqlite_query('COMMIT', $this->db_connect_id);
break;
case 'rollback':
return @sqlite_query('ROLLBACK', $this->db_connect_id);
break;
}
return true;
}
/**
* Return number of affected rows. See {@link phpbb_dbal::sql_affectedrows() sql_affectedrows()} for details.
*/
public function sql_affectedrows()
{
return ($this->db_connect_id) ? @sqlite_changes($this->db_connect_id) : false;
}
/**
* Get last inserted id after insert statement. See {@link phpbb_dbal::sql_nextid() sql_nextid()} for details.
*/
public function sql_nextid()
{
return ($this->db_connect_id) ? @sqlite_last_insert_rowid($this->db_connect_id) : false;
}
/**
* Fetch current row. See {@link phpbb_dbal::_sql_fetchrow() _sql_fetchrow()} for details.
*/
protected function _sql_fetchrow($query_id)
{
return @sqlite_fetch_array($query_id, SQLITE_ASSOC);
}
/**
* Free query result. See {@link phpbb_dbal::_sql_freeresult() _sql_freeresult()} for details.
*/
protected function _sql_freeresult($query_id)
{
return true;
}
/**
* Correctly adjust LIKE expression for special characters. See {@link phpbb_dbal::_sql_like_expression() _sql_like_expression()} for details.
*/
protected function _sql_like_expression($expression)
{
// Unlike LIKE, GLOB is case sensitive (unfortunatly). SQLite users need to live with it!
// We only catch * and ? here, not the character map possible for file globbing.
$expression = str_replace(array(chr(0) . '_', chr(0) . '%'), array(chr(0) . '?', chr(0) . '*'), $expression);
$expression = str_replace(array('?', '*'), array("\?", "\*"), $expression);
$expression = str_replace(array(chr(0) . "\?", chr(0) . "\*"), array('?', '*'), $expression);
return 'GLOB \'' . $this->sql_escape($expression) . '\'';
}
/**
* Escape string used in sql query. See {@link phpbb_dbal::sql_escape() sql_escape()} for details.
*/
public function sql_escape($msg)
{
return @sqlite_escape_string($msg);
}
/**
* Expose a DBMS specific function. See {@link phpbb_dbal::sql_function() sql_function()} for details.
*/
public function sql_function($type, $col)
{
switch ($type)
{
case 'length_varchar':
case 'length_text':
return 'LENGTH(' . $col . ')';
break;
}
}
/**
* Handle data by using prepared statements. See {@link phpbb_dbal::sql_handle_data() sql_handle_data()} for details.
public function sql_handle_data($type, $table, $data, $where = '')
{
}
*/
/**
* Build DB-specific query bits. See {@link phpbb_dbal::_sql_custom_build() _sql_custom_build()} for details.
*/
protected function _sql_custom_build($stage, $data)
{
return $data;
}
/**
* return sql error array. See {@link phpbb_dbal::_sql_error() _sql_error()} for details.
*/
protected function _sql_error()
{
return array(
'message' => @sqlite_error_string(@sqlite_last_error($this->db_connect_id)),
'code' => @sqlite_last_error($this->db_connect_id)
);
}
/**
* Run DB-specific code to build SQL Report to explain queries, show statistics and runtime information. See {@link phpbb_dbal::_sql_report() _sql_report()} for details.
*/
protected function _sql_report($mode, $query = '')
{
switch ($mode)
{
case 'start':
break;
case 'fromcache':
$endtime = explode(' ', microtime());
$endtime = $endtime[0] + $endtime[1];
$result = @sqlite_query($query, $this->db_connect_id);
while ($void = @sqlite_fetch_array($result, SQLITE_ASSOC))
{
// Take the time spent on parsing rows into account
}
$splittime = explode(' ', microtime());
$splittime = $splittime[0] + $splittime[1];
$this->sql_report('record_fromcache', $query, $endtime, $splittime);
break;
}
}
}
?>