1 files changed, 493 insertions, 0 deletions
diff --git a/phpBB/phpbb/db/driver/postgres.php b/phpBB/phpbb/db/driver/postgres.php
new file mode 100644
index 0000000000..7a98b90c73
--- /dev/null
+++ b/phpBB/phpbb/db/driver/postgres.php
@@ -0,0 +1,493 @@
+<?php
+/**
+*
+* @package dbal
+* @copyright (c) 2005 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+namespace phpbb\db\driver;
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+* PostgreSQL Database Abstraction Layer
+* Minimum Requirement is Version 7.3+
+* @package dbal
+*/
+class postgres extends \phpbb\db\driver\driver
+{
+	var $last_query_text = '';
+	var $connect_error = '';
+
+	/**
+	* Connect to server
+	*/
+	function sql_connect($sqlserver, $sqluser, $sqlpassword, $database, $port = false, $persistency = false, $new_link = false)
+	{
+		$connect_string = '';
+
+		if ($sqluser)
+		{
+			$connect_string .= "user=$sqluser ";
+		}
+
+		if ($sqlpassword)
+		{
+			$connect_string .= "password=$sqlpassword ";
+		}
+
+		if ($sqlserver)
+		{
+			// $sqlserver can carry a port separated by : for compatibility reasons
+			// If $sqlserver has more than one : it's probably an IPv6 address.
+			// In this case we only allow passing a port via the $port variable.
+			if (substr_count($sqlserver, ':') === 1)
+			{
+				list($sqlserver, $port) = explode(':', $sqlserver);
+			}
+
+			if ($sqlserver !== 'localhost')
+			{
+				$connect_string .= "host=$sqlserver ";
+			}
+
+			if ($port)
+			{
+				$connect_string .= "port=$port ";
+			}
+		}
+
+		$schema = '';
+
+		if ($database)
+		{
+			$this->dbname = $database;
+			if (strpos($database, '.') !== false)
+			{
+				list($database, $schema) = explode('.', $database);
+			}
+			$connect_string .= "dbname=$database";
+		}
+
+		$this->persistency = $persistency;
+
+		if ($this->persistency)
+		{
+			if (!function_exists('pg_pconnect'))
+			{
+				$this->connect_error = 'pg_pconnect function does not exist, is pgsql extension installed?';
+				return $this->sql_error('');
+			}
+			$collector = new \phpbb\error_collector;
+			$collector->install();
+			$this->db_connect_id = (!$new_link) ? @pg_pconnect($connect_string) : @pg_pconnect($connect_string, PGSQL_CONNECT_FORCE_NEW);
+		}
+		else
+		{
+			if (!function_exists('pg_connect'))
+			{
+				$this->connect_error = 'pg_connect function does not exist, is pgsql extension installed?';
+				return $this->sql_error('');
+			}
+			$collector = new \phpbb\error_collector;
+			$collector->install();
+			$this->db_connect_id = (!$new_link) ? @pg_connect($connect_string) : @pg_connect($connect_string, PGSQL_CONNECT_FORCE_NEW);
+		}
+
+		$collector->uninstall();
+
+		if ($this->db_connect_id)
+		{
+			if (version_compare($this->sql_server_info(true), '8.2', '>='))
+			{
+				$this->multi_insert = true;
+			}
+
+			if ($schema !== '')
+			{
+				@pg_query($this->db_connect_id, 'SET search_path TO ' . $schema);
+			}
+			return $this->db_connect_id;
+		}
+
+		$this->connect_error = $collector->format_errors();
+		return $this->sql_error('');
+	}
+
+	/**
+	* Version information about used database
+	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache If true, it is safe to retrieve the value from the cache
+	* @return string sql server version
+	*/
+	function sql_server_info($raw = false, $use_cache = true)
+	{
+		global $cache;
+
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('pgsql_version')) === false)
+		{
+			$query_id = @pg_query($this->db_connect_id, 'SELECT VERSION() AS version');
+			$row = @pg_fetch_assoc($query_id, null);
+			@pg_free_result($query_id);
+
+			$this->sql_server_version = (!empty($row['version'])) ? trim(substr($row['version'], 10)) : 0;
+
+			if (!empty($cache) && $use_cache)
+			{
+				$cache->put('pgsql_version', $this->sql_server_version);
+			}
+		}
+
+		return ($raw) ? $this->sql_server_version : 'PostgreSQL ' . $this->sql_server_version;
+	}
+
+	/**
+	* SQL Transaction
+	* @access private
+	*/
+	function _sql_transaction($status = 'begin')
+	{
+		switch ($status)
+		{
+			case 'begin':
+				return @pg_query($this->db_connect_id, 'BEGIN');
+			break;
+
+			case 'commit':
+				return @pg_query($this->db_connect_id, 'COMMIT');
+			break;
+
+			case 'rollback':
+				return @pg_query($this->db_connect_id, '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'))
+			{
+				$this->sql_report('start', $query);
+			}
+
+			$this->last_query_text = $query;
+			$this->query_result = ($cache && $cache_ttl) ? $cache->sql_load($query) : false;
+			$this->sql_add_num_queries($this->query_result);
+
+			if ($this->query_result === false)
+			{
+				if (($this->query_result = @pg_query($this->db_connect_id, $query)) === false)
+				{
+					$this->sql_error($query);
+				}
+
+				if (defined('DEBUG'))
+				{
+					$this->sql_report('stop', $query);
+				}
+
+				if ($cache && $cache_ttl)
+				{
+					$this->open_queries[(int) $this->query_result] = $this->query_result;
+					$this->query_result = $cache->sql_save($this, $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'))
+			{
+				$this->sql_report('fromcache', $query);
+			}
+		}
+		else
+		{
+			return false;
+		}
+
+		return $this->query_result;
+	}
+
+	/**
+	* Build db-specific query data
+	* @access private
+	*/
+	function _sql_custom_build($stage, $data)
+	{
+		return $data;
+	}
+
+	/**
+	* Build LIMIT query
+	*/
+	function _sql_query_limit($query, $total, $offset = 0, $cache_ttl = 0)
+	{
+		$this->query_result = false;
+
+		// if $total is set to 0 we do not want to limit the number of rows
+		if ($total == 0)
+		{
+			$total = 'ALL';
+		}
+
+		$query .= "\n LIMIT $total OFFSET $offset";
+
+		return $this->sql_query($query, $cache_ttl);
+	}
+
+	/**
+	* Return number of affected rows
+	*/
+	function sql_affectedrows()
+	{
+		return ($this->query_result) ? @pg_affected_rows($this->query_result) : false;
+	}
+
+	/**
+	* Fetch current row
+	*/
+	function sql_fetchrow($query_id = false)
+	{
+		global $cache;
+
+		if ($query_id === false)
+		{
+			$query_id = $this->query_result;
+		}
+
+		if ($cache && $cache->sql_exists($query_id))
+		{
+			return $cache->sql_fetchrow($query_id);
+		}
+
+		return ($query_id !== false) ? @pg_fetch_assoc($query_id, null) : false;
+	}
+
+	/**
+	* Seek to given row number
+	* rownum is zero-based
+	*/
+	function sql_rowseek($rownum, &$query_id)
+	{
+		global $cache;
+
+		if ($query_id === false)
+		{
+			$query_id = $this->query_result;
+		}
+
+		if ($cache && $cache->sql_exists($query_id))
+		{
+			return $cache->sql_rowseek($rownum, $query_id);
+		}
+
+		return ($query_id !== false) ? @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 !== false && $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] . "_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)
+	{
+		global $cache;
+
+		if ($query_id === false)
+		{
+			$query_id = $this->query_result;
+		}
+
+		if ($cache && $cache->sql_exists($query_id))
+		{
+			return $cache->sql_freeresult($query_id);
+		}
+
+		if (isset($this->open_queries[(int) $query_id]))
+		{
+			unset($this->open_queries[(int) $query_id]);
+			return @pg_free_result($query_id);
+		}
+
+		return false;
+	}
+
+	/**
+	* Escape string used in sql query
+	* Note: Do not use for bytea values if we may use them at a later stage
+	*/
+	function sql_escape($msg)
+	{
+		return @pg_escape_string($msg);
+	}
+
+	/**
+	* Build LIKE expression
+	* @access private
+	*/
+	function _sql_like_expression($expression)
+	{
+		return $expression;
+	}
+
+	/**
+	* @inheritdoc
+	*/
+	function cast_expr_to_bigint($expression)
+	{
+		return 'CAST(' . $expression . ' as DECIMAL(255, 0))';
+	}
+
+	/**
+	* @inheritdoc
+	*/
+	function cast_expr_to_string($expression)
+	{
+		return 'CAST(' . $expression . ' as VARCHAR(255))';
+	}
+
+	/**
+	* return sql error array
+	* @access private
+	*/
+	function _sql_error()
+	{
+		// pg_last_error only works when there is an established connection.
+		// Connection errors have to be tracked by us manually.
+		if ($this->db_connect_id)
+		{
+			$message = @pg_last_error($this->db_connect_id);
+		}
+		else
+		{
+			$message = $this->connect_error;
+		}
+
+		return array(
+			'message'	=> $message,
+			'code'		=> ''
+		);
+	}
+
+	/**
+	* Close sql connection
+	* @access private
+	*/
+	function _sql_close()
+	{
+		return @pg_close($this->db_connect_id);
+	}
+
+	/**
+	* Build db-specific report
+	* @access private
+	*/
+	function _sql_report($mode, $query = '')
+	{
+		switch ($mode)
+		{
+			case 'start':
+
+				$explain_query = $query;
+				if (preg_match('/UPDATE ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
+				{
+					$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
+				}
+				else if (preg_match('/DELETE FROM ([a-z0-9_]+).*?WHERE(.*)/s', $query, $m))
+				{
+					$explain_query = 'SELECT * FROM ' . $m[1] . ' WHERE ' . $m[2];
+				}
+
+				if (preg_match('/^SELECT/', $explain_query))
+				{
+					$html_table = false;
+
+					if ($result = @pg_query($this->db_connect_id, "EXPLAIN $explain_query"))
+					{
+						while ($row = @pg_fetch_assoc($result, NULL))
+						{
+							$html_table = $this->sql_report('add_select_row', $query, $html_table, $row);
+						}
+					}
+					@pg_free_result($result);
+
+					if ($html_table)
+					{
+						$this->html_hold .= '</table>';
+					}
+				}
+
+			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;
+		}
+	}
+}