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<?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', 'postgres');
include($phpbb_root_path . 'includes/db/dbal.' . $phpEx);
/**
* @package dbal
* PostgreSQL Database Abstraction Layer
* Minimum Requirement is Version 7.3+
*/
class dbal_postgres extends dbal
{
var $last_query_text = '';
/**
* Connect to server
*/
function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false)
{
$this->connect_string = '';
if ($sqluser)
{
$this->connect_string .= "user=$sqluser ";
}
if ($sqlpassword)
{
$this->connect_string .= "password=$sqlpassword ";
}
if ($sqlserver)
{
if (ereg(":", $sqlserver))
{
list($sqlserver, $sqlport) = split(":", $sqlserver);
$this->connect_string .= "host=$sqlserver port=$sqlport ";
}
else
{
if ($sqlserver != "localhost")
{
$this->connect_string .= "host=$sqlserver ";
}
if ($port)
{
$this->connect_string .= "port=$port ";
}
}
}
if ($database)
{
$this->dbname = $database;
$this->connect_string .= "dbname=$database";
}
$this->persistency = $persistency;
$this->db_connect_id = ($this->persistency) ? @pg_pconnect($this->connect_string) : @pg_connect($this->connect_string);
return ($this->db_connect_id) ? $this->db_connect_id : $this->sql_error('');
}
/**
* sql transaction
*/
function sql_transaction($status = 'begin')
{
switch ($status)
{
case 'begin':
$result = @pg_query($this->db_connect_id, 'BEGIN');
$this->transaction = true;
break;
case 'commit':
$result = @pg_query($this->db_connect_id, 'COMMIT');
$this->transaction = false;
if (!$result)
{
@pg_query($this->db_connect_id, 'ROLLBACK');
}
break;
case 'rollback':
$result = @pg_query($this->db_connect_id, 'ROLLBACK');
$this->transaction = false;
break;
default:
$result = true;
}
return $result;
}
/**
* Base query method
*/
function sql_query($query = '', $cache_ttl = 0)
{
if ($query != '')
{
global $cache;
if (strpos($query, 'SELECT') === 0 && strpos($query, 'FROM (') !== false)
{
$query = preg_replace('#FROM \(([^)]+)\)\s#', 'FROM \1 ', $query);
}
// 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;
if (!$this->query_result)
{
$this->num_queries++;
if (($this->query_result = @pg_exec($this->db_connect_id, $query)) === 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, $cache_ttl);
}
else if (strpos($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) ? $this->query_result : false;
}
/**
* Build LIMIT query
*/
function sql_query_limit($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;
}
$query .= "\n LIMIT $total OFFSET $offset";
return $this->sql_query($query, $cache_ttl);
}
else
{
return false;
}
}
/**
* Return number of rows
* Not used within core code
*/
function sql_numrows($query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
return ($query_id) ? @pg_num_rows($query_id) : false;
}
/**
* Return number of affected rows
*/
function sql_affectedrows()
{
return ($this->query_result) ? @pg_cmdtuples($this->query_result) : false;
}
/**
* Fetch current row
*/
function sql_fetchrow($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);
}
return ($query_id) ? @pg_fetch_assoc($query_id, NULL) : false;
}
/**
* Fetch field
* if rownum is false, the current row is used, else it is pointing to the row (zero-based)
*/
function sql_fetchfield($field, $rownum = false, $query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
if ($query_id)
{
if ($rownum !== false)
{
$this->sql_rowseek($rownum, $query_id);
}
$row = $this->sql_fetchrow($query_id);
return isset($row[$field]) ? $row[$field] : false;
}
return false;
}
/**
* Seek to given row number
* rownum is zero-based
*/
function sql_rowseek($rownum, $query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
return ($query_id) ? @pg_result_seek($query_id, $rownum) : false;
}
/**
* Get last inserted id after insert statement
*/
function sql_nextid()
{
$query_id = $this->query_result;
if ($query_id && $this->last_query_text != '')
{
if (preg_match("/^INSERT[\t\n ]+INTO[\t\n ]+([a-z0-9\_\-]+)/is", $this->last_query_text, $tablename))
{
$query = "SELECT currval('" . $tablename[1] . "_id_seq') AS last_value";
$temp_q_id = @pg_query($this->db_connect_id, $query);
if (!$temp_q_id)
{
return false;
}
$temp_result = @pg_fetch_assoc($temp_q_id, NULL);
@pg_free_result($query_id);
return ($temp_result) ? $temp_result['last_value'] : false;
}
}
return false;
}
/**
* Free sql result
*/
function sql_freeresult($query_id = false)
{
if (!$query_id)
{
$query_id = $this->query_result;
}
if (isset($this->open_queries[(int) $query_id]))
{
unset($this->open_queries[(int) $query_id]);
return @pg_free_result($query_id);
}
}
/**
* Escape string used in sql query
*/
function sql_escape($msg)
{
// Do not use for bytea values
return @pg_escape_string($msg);
}
/**
* return sql error array
* @private
*/
function _sql_error()
{
return array(
'message' => (!$this->db_connect_id) ? @pg_last_error() : @pg_last_error($this->db_connect_id),
'code' => ''
);
}
/**
* Close sql connection
* @private
*/
function _sql_close()
{
return @pg_close($this->db_connect_id);
}
/**
* Build db-specific report
* @private
*/
function _sql_report($mode, $query = '')
{
switch ($mode)
{
case 'start':
break;
case 'fromcache':
$endtime = explode(' ', microtime());
$endtime = $endtime[0] + $endtime[1];
$result = @pg_query($this->db_connect_id, $query);
while ($void = @pg_fetch_assoc($result, NULL))
{
// Take the time spent on parsing rows into account
}
@pg_free_result($result);
$splittime = explode(' ', microtime());
$splittime = $splittime[0] + $splittime[1];
$this->sql_report('record_fromcache', $query, $endtime, $splittime);
break;
}
}
}
} // if ... defined
?>
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