system/database/drivers/postgre/postgre_driver.php - code-igniter-v3-giggi - Gitiles

 <?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
 /**
  * Code Igniter
  *
  * An open source application development framework for PHP 4.3.2 or newer
  *
  * @package		CodeIgniter
  * @author		Rick Ellis
  * @copyright	Copyright (c) 2006, pMachine, Inc.
  * @license		http://www.codeignitor.com/user_guide/license.html
  * @link		http://www.codeigniter.com
  * @since		Version 1.0
  * @filesource
  */

 // ------------------------------------------------------------------------

 /**
  * Postgre Database Adapter Class
  *
  * Note: _DB is an extender class that the app controller
  * creates dynamically based on whether the active record
  * class is being used or not.
  *
  * @package		CodeIgniter
  * @subpackage	Drivers
  * @category	Database
  * @author		Rick Ellis
  * @link		http://www.codeigniter.com/user_guide/database/
  */
 class CI_DB_postgre_driver extends CI_DB {

 	/**
 	 * Non-persistent database connection
 	 *
 	 * @access	private called by the base class
 	 * @return	resource
 	 */
 	function db_connect()
 	{
 		$port = ($this->port == '') ? '' : " port=".$this->port;

 		return pg_connect("host=".$this->hostname.$port." dbname=".$this->database." user=".$this->username." password=".$this->password);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Persistent database connection
 	 *
 	 * @access	private called by the base class
 	 * @return	resource
 	 */
 	function db_pconnect()
 	{
 		$port = ($this->port == '') ? '' : " port=".$this->port;

 		return pg_pconnect("host=".$this->hostname.$port." dbname=".$this->database." user=".$this->username." password=".$this->password);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Select the database
 	 *
 	 * @access	private called by the base class
 	 * @return	resource
 	 */
 	function db_select()
 	{
 		// Not needed for Postgre so we'll return TRUE
 		return TRUE;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Version number query string
 	 *
 	 * @access	public
 	 * @return	string
 	 */
 	function _version()
 	{
 		return "SELECT version() AS ver";
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Execute the query
 	 *
 	 * @access	private called by the base class
 	 * @param	string	an SQL query
 	 * @return	resource
 	 */
 	function _execute($sql)
 	{
 		$sql = $this->_prep_query($sql);
 		return @pg_query($this->conn_id, $sql);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Prep the query
 	 *
 	 * If needed, each database adapter can prep the query string
 	 *
 	 * @access	private called by execute()
 	 * @param	string	an SQL query
 	 * @return	string
 	 */
 	function _prep_query($sql)
 	{
 		return $sql;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Begin Transaction
 	 *
 	 * @access	public
 	 * @return	bool
 	 */
 	function trans_begin($test_mode = FALSE)
 	{
 		if ( ! $this->trans_enabled)
 		{
 			return TRUE;
 		}

 		// When transactions are nested we only begin/commit/rollback the outermost ones
 		if ($this->_trans_depth > 0)
 		{
 			return TRUE;
 		}

 		// Reset the transaction failure flag.
 		// If the $test_mode flag is set to TRUE transactions will be rolled back
 		// even if the queries produce a successful result.
 		$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;

 		return @pg_exec($this->conn_id, "begin");
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Commit Transaction
 	 *
 	 * @access	public
 	 * @return	bool
 	 */
 	function trans_commit()
 	{
 		if ( ! $this->trans_enabled)
 		{
 			return TRUE;
 		}

 		// When transactions are nested we only begin/commit/rollback the outermost ones
 		if ($this->_trans_depth > 0)
 		{
 			return TRUE;
 		}

 		return @pg_exec($this->conn_id, "commit");
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Rollback Transaction
 	 *
 	 * @access	public
 	 * @return	bool
 	 */
 	function trans_rollback()
 	{
 		if ( ! $this->trans_enabled)
 		{
 			return TRUE;
 		}

 		// When transactions are nested we only begin/commit/rollback the outermost ones
 		if ($this->_trans_depth > 0)
 		{
 			return TRUE;
 		}

 		return @pg_exec($this->conn_id, "rollback");
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Escape String
 	 *
 	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
 	function escape_str($str)
 	{
 		return pg_escape_string($str);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Affected Rows
 	 *
 	 * @access	public
 	 * @return	integer
 	 */
 	function affected_rows()
 	{
 		return @pg_affected_rows($this->result_id);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Insert ID
 	 *
 	 * @access	public
 	 * @return	integer
 	 */
 	function insert_id()
 	{
 		$v = pg_version($this->conn_id);
 		$v = $v['server'];

 		$table	= func_num_args() > 0 ? func_get_arg(0) : null;
 		$column	= func_num_args() > 1 ? func_get_arg(1) : null;

 		if ($table == null && $v >= '8.1')
 		{
 			$sql='SELECT LASTVAL() as ins_id';
 		}
 		elseif ($table != null && $column != null && $v >= '8.0')
 		{
 			$sql = sprintf("SELECT pg_get_serial_sequence('%s','%s') as seq", $table, $column);
 			$query = $this->query($sql);
 			$row = $query->row();
 			$sql = sprintf("SELECT CURRVAL('%s') as ins_id", $row->seq);
 		}
 		elseif ($table != null)
 		{
 			// seq_name passed in table parameter
 			$sql = sprintf("SELECT CURRVAL('%s') as ins_id", $table);
 		}
 		else
 		{
 			return pg_last_oid($this->result_id);
 		}
 		$query = $this->query($sql);
 		$row = $query->row();
 		return $row->ins_id;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * "Count All" query
 	 *
 	 * Generates a platform-specific query string that counts all records in
 	 * the specified database
 	 *
 	 * @access	public
 	 * @param	string
 	 * @return	string
 	 */
 	function count_all($table = '')
 	{
 		if ($table == '')
 			return '0';

 		$query = $this->query('SELECT COUNT(*) AS numrows FROM "'.$this->dbprefix.$table.'"');

 		if ($query->num_rows() == 0)
 			return '0';

 		$row = $query->row();
 		return $row->numrows;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Show table query
 	 *
 	 * Generates a platform-specific query string so that the table names can be fetched
 	 *
 	 * @access	private
 	 * @return	string
 	 */
 	function _list_tables()
 	{
 		return "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Show column query
 	 *
 	 * Generates a platform-specific query string so that the column names can be fetched
 	 *
 	 * @access	public
 	 * @param	string	the table name
 	 * @return	string
 	 */
 	function _list_columns($table = '')
 	{
 		return "SELECT column_name FROM information_schema.columns WHERE table_name ='".$this->_escape_table($table)."'";
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Field data query
 	 *
 	 * Generates a platform-specific query so that the column data can be retrieved
 	 *
 	 * @access	public
 	 * @param	string	the table name
 	 * @return	object
 	 */
 	function _field_data($table)
 	{
 		return "SELECT * FROM ".$this->_escape_table($table)." LIMIT 1";
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * The error message string
 	 *
 	 * @access	private
 	 * @return	string
 	 */
 	function _error_message()
 	{
 		return pg_last_error($this->conn_id);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * The error message number
 	 *
 	 * @access	private
 	 * @return	integer
 	 */
 	function _error_number()
 	{
 		return '';
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Escape Table Name
 	 *
 	 * This function adds backticks if the table name has a period
 	 * in it. Some DBs will get cranky unless periods are escaped.
 	 *
 	 * @access	private
 	 * @param	string	the table name
 	 * @return	string
 	 */
 	function _escape_table($table)
 	{
 		if (stristr($table, '.'))
 		{
 			$table = '"'.preg_replace("/\./", '"."', $table).'"';
 		}

 		return $table;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Insert statement
 	 *
 	 * Generates a platform-specific insert string from the supplied data
 	 *
 	 * @access	public
 	 * @param	string	the table name
 	 * @param	array	the insert keys
 	 * @param	array	the insert values
 	 * @return	string
 	 */
 	function _insert($table, $keys, $values)
 	{
 		return "INSERT INTO ".$this->_escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Update statement
 	 *
 	 * Generates a platform-specific update string from the supplied data
 	 *
 	 * @access	public
 	 * @param	string	the table name
 	 * @param	array	the update data
 	 * @param	array	the where clause
 	 * @return	string
 	 */
 	function _update($table, $values, $where)
 	{
 		foreach($values as $key => $val)
 		{
 			$valstr[] = $key." = ".$val;
 		}

 		return "UPDATE ".$this->_escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Delete statement
 	 *
 	 * Generates a platform-specific delete string from the supplied data
 	 *
 	 * @access	public
 	 * @param	string	the table name
 	 * @param	array	the where clause
 	 * @return	string
 	 */
 	function _delete($table, $where)
 	{
 		return "DELETE FROM ".$this->_escape_table($table)." WHERE ".implode(" ", $where);
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Limit string
 	 *
 	 * Generates a platform-specific LIMIT clause
 	 *
 	 * @access	public
 	 * @param	string	the sql query string
 	 * @param	integer	the number of rows to limit the query to
 	 * @param	integer	the offset value
 	 * @return	string
 	 */
 	function _limit($sql, $limit, $offset)
 	{
 		$sql .= "LIMIT ".$limit;

 		if ($offset > 0)
 		{
 			$sql .= " OFFSET ".$offset;
 		}

 		return $sql;
 	}

 	// --------------------------------------------------------------------

 	/**
 	 * Close DB Connection
 	 *
 	 * @access	public
 	 * @param	resource
 	 * @return	void
 	 */
 	function _close($conn_id)
 	{
 		pg_close($conn_id);
 	}


 }

 ?>
	<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
	/**
	* Code Igniter
	*
	* An open source application development framework for PHP 4.3.2 or newer
	*
	* @package CodeIgniter
	* @author Rick Ellis
	* @copyright Copyright (c) 2006, pMachine, Inc.
	* @license http://www.codeignitor.com/user_guide/license.html
	* @link http://www.codeigniter.com
	* @since Version 1.0
	* @filesource
	*/

	// ------------------------------------------------------------------------

	/**
	* Postgre Database Adapter Class
	*
	* Note: _DB is an extender class that the app controller
	* creates dynamically based on whether the active record
	* class is being used or not.
	*
	* @package CodeIgniter
	* @subpackage Drivers
	* @category Database
	* @author Rick Ellis
	* @link http://www.codeigniter.com/user_guide/database/
	*/
	class CI_DB_postgre_driver extends CI_DB {

	/**
	* Non-persistent database connection
	*
	* @access private called by the base class
	* @return resource
	*/
	function db_connect()
	{
	$port = ($this->port == '') ? '' : " port=".$this->port;

	return pg_connect("host=".$this->hostname.$port." dbname=".$this->database." user=".$this->username." password=".$this->password);
	}

	// --------------------------------------------------------------------

	/**
	* Persistent database connection
	*
	* @access private called by the base class
	* @return resource
	*/
	function db_pconnect()
	{
	$port = ($this->port == '') ? '' : " port=".$this->port;

	return pg_pconnect("host=".$this->hostname.$port." dbname=".$this->database." user=".$this->username." password=".$this->password);
	}

	// --------------------------------------------------------------------

	/**
	* Select the database
	*
	* @access private called by the base class
	* @return resource
	*/
	function db_select()
	{
	// Not needed for Postgre so we'll return TRUE
	return TRUE;
	}

	// --------------------------------------------------------------------

	/**
	* Version number query string
	*
	* @access public
	* @return string
	*/
	function _version()
	{
	return "SELECT version() AS ver";
	}

	// --------------------------------------------------------------------

	/**
	* Execute the query
	*
	* @access private called by the base class
	* @param string an SQL query
	* @return resource
	*/
	function _execute($sql)
	{
	$sql = $this->_prep_query($sql);
	return @pg_query($this->conn_id, $sql);
	}

	// --------------------------------------------------------------------

	/**
	* Prep the query
	*
	* If needed, each database adapter can prep the query string
	*
	* @access private called by execute()
	* @param string an SQL query
	* @return string
	*/
	function _prep_query($sql)
	{
	return $sql;
	}

	// --------------------------------------------------------------------

	/**
	* Begin Transaction
	*
	* @access public
	* @return bool
	*/
	function trans_begin($test_mode = FALSE)
	{
	if ( ! $this->trans_enabled)
	{
	return TRUE;
	}

	// When transactions are nested we only begin/commit/rollback the outermost ones
	if ($this->_trans_depth > 0)
	{
	return TRUE;
	}

	// Reset the transaction failure flag.
	// If the $test_mode flag is set to TRUE transactions will be rolled back
	// even if the queries produce a successful result.
	$this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;

	return @pg_exec($this->conn_id, "begin");
	}

	// --------------------------------------------------------------------

	/**
	* Commit Transaction
	*
	* @access public
	* @return bool
	*/
	function trans_commit()
	{
	if ( ! $this->trans_enabled)
	{
	return TRUE;
	}

	// When transactions are nested we only begin/commit/rollback the outermost ones
	if ($this->_trans_depth > 0)
	{
	return TRUE;
	}

	return @pg_exec($this->conn_id, "commit");
	}

	// --------------------------------------------------------------------

	/**
	* Rollback Transaction
	*
	* @access public
	* @return bool
	*/
	function trans_rollback()
	{
	if ( ! $this->trans_enabled)
	{
	return TRUE;
	}

	// When transactions are nested we only begin/commit/rollback the outermost ones
	if ($this->_trans_depth > 0)
	{
	return TRUE;
	}

	return @pg_exec($this->conn_id, "rollback");
	}

	// --------------------------------------------------------------------

	/**
	* Escape String
	*
	* @access public
	* @param string
	* @return string
	*/
	function escape_str($str)
	{
	return pg_escape_string($str);
	}

	// --------------------------------------------------------------------

	/**
	* Affected Rows
	*
	* @access public
	* @return integer
	*/
	function affected_rows()
	{
	return @pg_affected_rows($this->result_id);
	}

	// --------------------------------------------------------------------

	/**
	* Insert ID
	*
	* @access public
	* @return integer
	*/
	function insert_id()
	{
	$v = pg_version($this->conn_id);
	$v = $v['server'];

	$table = func_num_args() > 0 ? func_get_arg(0) : null;
	$column = func_num_args() > 1 ? func_get_arg(1) : null;

	if ($table == null && $v >= '8.1')
	{
	$sql='SELECT LASTVAL() as ins_id';
	}
	elseif ($table != null && $column != null && $v >= '8.0')
	{
	$sql = sprintf("SELECT pg_get_serial_sequence('%s','%s') as seq", $table, $column);
	$query = $this->query($sql);
	$row = $query->row();
	$sql = sprintf("SELECT CURRVAL('%s') as ins_id", $row->seq);
	}
	elseif ($table != null)
	{
	// seq_name passed in table parameter
	$sql = sprintf("SELECT CURRVAL('%s') as ins_id", $table);
	}
	else
	{
	return pg_last_oid($this->result_id);
	}
	$query = $this->query($sql);
	$row = $query->row();
	return $row->ins_id;
	}

	// --------------------------------------------------------------------

	/**
	* "Count All" query
	*
	* Generates a platform-specific query string that counts all records in
	* the specified database
	*
	* @access public
	* @param string
	* @return string
	*/
	function count_all($table = '')
	{
	if ($table == '')
	return '0';

	$query = $this->query('SELECT COUNT(*) AS numrows FROM "'.$this->dbprefix.$table.'"');

	if ($query->num_rows() == 0)
	return '0';

	$row = $query->row();
	return $row->numrows;
	}

	// --------------------------------------------------------------------

	/**
	* Show table query
	*
	* Generates a platform-specific query string so that the table names can be fetched
	*
	* @access private
	* @return string
	*/
	function _list_tables()
	{
	return "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";
	}

	// --------------------------------------------------------------------

	/**
	* Show column query
	*
	* Generates a platform-specific query string so that the column names can be fetched
	*
	* @access public
	* @param string the table name
	* @return string
	*/
	function _list_columns($table = '')
	{
	return "SELECT column_name FROM information_schema.columns WHERE table_name ='".$this->_escape_table($table)."'";
	}

	// --------------------------------------------------------------------

	/**
	* Field data query
	*
	* Generates a platform-specific query so that the column data can be retrieved
	*
	* @access public
	* @param string the table name
	* @return object
	*/
	function _field_data($table)
	{
	return "SELECT * FROM ".$this->_escape_table($table)." LIMIT 1";
	}

	// --------------------------------------------------------------------

	/**
	* The error message string
	*
	* @access private
	* @return string
	*/
	function _error_message()
	{
	return pg_last_error($this->conn_id);
	}

	// --------------------------------------------------------------------

	/**
	* The error message number
	*
	* @access private
	* @return integer
	*/
	function _error_number()
	{
	return '';
	}

	// --------------------------------------------------------------------

	/**
	* Escape Table Name
	*
	* This function adds backticks if the table name has a period
	* in it. Some DBs will get cranky unless periods are escaped.
	*
	* @access private
	* @param string the table name
	* @return string
	*/
	function _escape_table($table)
	{
	if (stristr($table, '.'))
	{
	$table = '"'.preg_replace("/\./", '"."', $table).'"';
	}

	return $table;
	}

	// --------------------------------------------------------------------

	/**
	* Insert statement
	*
	* Generates a platform-specific insert string from the supplied data
	*
	* @access public
	* @param string the table name
	* @param array the insert keys
	* @param array the insert values
	* @return string
	*/
	function _insert($table, $keys, $values)
	{
	return "INSERT INTO ".$this->_escape_table($table)." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
	}

	// --------------------------------------------------------------------

	/**
	* Update statement
	*
	* Generates a platform-specific update string from the supplied data
	*
	* @access public
	* @param string the table name
	* @param array the update data
	* @param array the where clause
	* @return string
	*/
	function _update($table, $values, $where)
	{
	foreach($values as $key => $val)
	{
	$valstr[] = $key." = ".$val;
	}

	return "UPDATE ".$this->_escape_table($table)." SET ".implode(', ', $valstr)." WHERE ".implode(" ", $where);
	}

	// --------------------------------------------------------------------

	/**
	* Delete statement
	*
	* Generates a platform-specific delete string from the supplied data
	*
	* @access public
	* @param string the table name
	* @param array the where clause
	* @return string
	*/
	function _delete($table, $where)
	{
	return "DELETE FROM ".$this->_escape_table($table)." WHERE ".implode(" ", $where);
	}

	// --------------------------------------------------------------------

	/**
	* Limit string
	*
	* Generates a platform-specific LIMIT clause
	*
	* @access public
	* @param string the sql query string
	* @param integer the number of rows to limit the query to
	* @param integer the offset value
	* @return string
	*/
	function _limit($sql, $limit, $offset)
	{
	$sql .= "LIMIT ".$limit;

	if ($offset > 0)
	{
	$sql .= " OFFSET ".$offset;
	}

	return $sql;
	}

	// --------------------------------------------------------------------

	/**
	* Close DB Connection
	*
	* @access public
	* @param resource
	* @return void
	*/
	function _close($conn_id)
	{
	pg_close($conn_id);
	}


	}

	?>