aboutsummaryrefslogtreecommitdiffstats
path: root/phpBB/includes/db/mssql.php
blob: cb6b5123c0a575f03b3799ecc6d34bc4a53db4b5 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
'#n146'>146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407
<?php
/** 
*
* @package dbal
* @version $Id$
* @copyright (c) 2005 phpBB Group 
* @license http://opensource.org/licenses/gpl-license.php GNU Public License 
*
*/

/**
* @ignore
*/
if (!defined('SQL_LAYER'))
{

	define('SQL_LAYER', 'mssql');
	include($phpbb_root_path . 'includes/db/dbal.' . $phpEx);

/**
* @package dbal
* MSSQL Database Abstraction Layer
* Minimum Requirement is MSSQL 2000+
*/
class dbal_mssql extends dbal
{

	function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false)
	{
		$this->persistency = $persistency;
		$this->user = $sqluser;
		$this->server = $sqlserver . (($port) ? ':' . $port : '');
		$this->dbname = $database;

		$this->db_connect_id = ($this->persistency) ? @mssql_pconnect($this->server, $this->user, $sqlpassword) : @mssql_connect($this->server, $this->user, $sqlpassword);

		if ($this->db_connect_id && $this->dbname != '')
		{
			if (!@mssql_select_db($this->dbname, $this->db_connect_id))
			{
				@mssql_close($this->db_connect_id);
				return false;
			}
		}

		return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
	}

	function sql_close()
	{
		if (!$this->db_connect_id)
		{
			return false;
		}

		if ($this->transaction)
		{
			@mssql_query('COMMIT', $this->db_connect_id);
		}

		if (sizeof($this->open_queries))
		{
			foreach ($this->open_queries as $i_query_id => $query_id)
			{
				@mssql_free_result($query_id);
			}
		}

		return @mssql_close($this->db_connect_id);
	}

	function sql_transaction($status = 'begin')
	{
		switch ($status)
		{
			case 'begin':
				$result = @mssql_query('BEGIN TRANSACTION', $this->db_connect_id);
				$this->transaction = true;
				break;

			case 'commit':
				$result = @mssql_query('commit', $this->db_connect_id);
				$this->transaction = false;

				if (!$result)
				{
					@mssql_query('ROLLBACK', $this->db_connect_id);
				}
				break;

			case 'rollback':
				$result = @mssql_query('ROLLBACK', $this->db_connect_id);
				$this->transaction = false;
				break;

			default:
				$result = true;
		}

		return $result;
	}

	// Base query method
	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);
			}

			$this->query_result = ($cache_ttl && method_exists($cache, 'sql_load')) ? $cache->sql_load($query) : false;

			if (!$this->query_result)
			{
				$this->num_queries++;
				
				if (($this->query_result = @mssql_query($query, $this->db_connect_id)) === false)
				{
					$this->sql_error($query);
				}

				if (defined('DEBUG_EXTRA'))
				{
					$this->sql_report('stop', $query);
				}

				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, $cache_ttl);
					// sql_freeresult called within sql_save()
				}
				else if (strpos($query, 'SELECT') !== false && $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) ? $this->query_result : false;
	}

	function sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0) 
	{ 
		if ($query != '') 
		{
			$this->query_result = false; 

			// if $total is set to 0 we do not want to limit the number of rows
			if ($total == 0)
			{
				$total = -1;
			}

			$row_offset = ($total) ? $offset : '';
			$num_rows = ($total) ? $total : $offset;

			$query = 'SELECT TOP ' . ($row_offset + $num_rows) . ' ' . substr($query, 6);

			return $this->sql_query($query, $cache_ttl); 
		} 
		else 
		{ 
			return false; 
		} 
	}

	// Other query methods
	//
	// NOTE :: Want to remove _ALL_ reliance on sql_numrows from core code ...
	//         don't want this here by a middle Milestone
	function sql_numrows($query_id = false)
	{
		if (!$query_id)
		{
			$query_id = $this->query_result;
		}

//		return (isset($this->limit_offset[$query_id])) ? @mssql_num_rows($query_id) - $this->limit_offset[$query_id] : @mssql_num_rows($query_id);
		return ($query_id) ? @mssql_num_rows($query_id) : false;
	}

	function sql_affectedrows()
	{
		return ($this->db_connect_id) ? @mssql_rows_affected($this->db_connect_id) : false;
	}

	function sql_fetchrow($query_id = false)
	{
		global $cache;

		if (!$query_id)
		{
			$query_id = $this->query_result;
		}

		if (isset($cache->sql_rowset[$query_id]))
		{
			return $cache->sql_fetchrow($query_id);
		}

		$row = @mssql_fetch_array($query_id, MSSQL_ASSOC);
		
		if ($row)
		{
			foreach ($row as $key => $value)
			{
				$row[$key] = ($value === ' ') ? trim($value) : $value;
			}
		}

		return $row;
	}

	function sql_fetchrowset($query_id = false)
	{
		if (!$query_id)
		{
			$query_id = $this->query_result;
		}

		if ($query_id)
		{
			unset($this->rowset[$query_id]);
			unset($this->row[$query_id]);

			$result = array();
			while ($this->rowset[$query_id] = $this->sql_fetchrow($query_id))
			{
				$result[] = $this->rowset[$query_id];
			}
			return $result;
		}

		return false;
	}

	function sql_fetchfield($field, $rownum = -1, $query_id = false)
	{
		if (!$query_id)
		{
			$query_id = $this->query_result;
		}

		if ($query_id)
		{
			if ($rownum > -1)
			{
//				(!empty($this->limit_offset[$query_id])) ? @mssql_data_seek($query_id, ($this->limit_offset[$query_id] + $rownum)) : @mssql_data_seek($query_id, $rownum);
				@mssql_data_seek($query_id, $rownum);
				$row = @mssql_fetch_array($query_id, MSSQL_ASSOC);
				$result = isset($row[$field]) ? $row[$field] : false;
			}
			else
			{
				if (empty($this->row[$query_id]) && empty($this->rowset[$query_id]))
				{
					if ($this->row[$query_id] = $this->sql_fetchrow($query_id))
					{
						$result = $this->row[$query_id][$field];
					}
				}
				else
				{
					if ($this->rowset[$query_id])
					{
						$result = $this->rowset[$query_id][$field];
					}
					elseif ($this->row[$query_id])
					{
						$result = $this->row[$query_id][$field];
					}
				}
			}

			return $result;
		}

		return false;
	}

	function sql_rowseek($rownum, $query_id = false)
	{
		if (!$query_id)
		{
			$query_id = $this->query_result;
		}

		if (isset($this->current_row[$query_id]))
		{
//			(!empty($this->limit_offset[$query_id])) ? @mssql_data_seek($query_id, ($this->limit_offset[$query_id] + $rownum)) : @mssql_data_seek($query_id, $rownum);
			@mssql_data_seek($query_id, $rownum);
			return true;
		}

		return false;
	}

	function sql_nextid()
	{
		$result_id = @mssql_query('SELECT @@IDENTITY', $this->db_connect_id);
		if ($result_id)
		{
			if (@mssql_fetch_array($result_id, MSSQL_ASSOC))
			{
				return @mssql_result($result_id, 1);	
			}
		}

		return false;
	}

	function sql_freeresult($query_id = false)
	{
		if (!$query_id)
		{
			$query_id = $this->query_result;
		}

		if (isset($this->open_queries[$query_id]))
		{
			unset($this->open_queries[$query_id]);
			unset($this->result_rowset[$query_id]);

			return @mssql_free_result($query_id);
		}

		return false;
	}

	function sql_escape($msg)
	{
		return str_replace("'", "''", str_replace('\\', '\\\\', $msg));
	}

	function db_sql_error()
	{
		return array(
			'message'	=> @mssql_get_last_message($this->db_connect_id),
			'code'		=> ''
		);
	}

	function _sql_report($mode, $query = '')
	{
		global $cache, $starttime, $phpbb_root_path;
		static $curtime, $query_hold, $html_hold;
		static $sql_report = '';
		static $cache_num_queries = 0;

		switch ($mode)
		{
			case 'start':
				$query_hold = $query;
				$html_hold = '';

				$curtime = explode(' ', microtime());
				$curtime = $curtime[0] + $curtime[1];
				break;

			case 'fromcache':
				$endtime = explode(' ', microtime());
				$endtime = $endtime[0] + $endtime[1];

				$result = @mssql_query($query, $this->db_connect_id);
				while ($void = @mssql_fetch_array($result, MSSQL_ASSOC))
				{
					// Take the time spent on parsing rows into account
				}
				$splittime = explode(' ', microtime());
				$splittime = $splittime[0] + $splittime[1];

				$time_cache = $endtime - $curtime;
				$time_db = $splittime - $endtime;
				$color = ($time_db > $time_cache) ? 'green' : 'red';

				$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">';

				$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>';

				// Pad the start time to not interfere with page timing
				$starttime += $time_db;

				@mssql_free_result($result);
				$cache_num_queries++;
				break;
		}
	}

}

} // if ... define

?>