703 lines
15 KiB
PHP
703 lines
15 KiB
PHP
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
|
|
/**
|
|
* CodeIgniter
|
|
*
|
|
* An open source application development framework for PHP 5.1.6 or newer
|
|
*
|
|
* @package CodeIgniter
|
|
* @author ExpressionEngine Dev Team
|
|
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
|
|
* @license http://codeigniter.com/user_guide/license.html
|
|
* @link http://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 ExpressionEngine Dev Team
|
|
* @link http://codeigniter.com/user_guide/database/
|
|
*/
|
|
class CI_DB_postgre_driver extends CI_DB {
|
|
|
|
var $dbdriver = 'postgre';
|
|
|
|
var $_escape_char = '"';
|
|
|
|
// clause and character used for LIKE escape sequences
|
|
var $_like_escape_str = " ESCAPE '%s' ";
|
|
var $_like_escape_chr = '!';
|
|
|
|
/**
|
|
* The syntax to count rows is slightly different across different
|
|
* database engines, so this string appears in each driver and is
|
|
* used for the count_all() and count_all_results() functions.
|
|
*/
|
|
var $_count_string = "SELECT COUNT(*) AS ";
|
|
var $_random_keyword = ' RANDOM()'; // database specific random keyword
|
|
|
|
/**
|
|
* Connection String
|
|
*
|
|
* @access private
|
|
* @return string
|
|
*/
|
|
function _connect_string()
|
|
{
|
|
$components = array(
|
|
'hostname' => 'host',
|
|
'port' => 'port',
|
|
'database' => 'dbname',
|
|
'username' => 'user',
|
|
'password' => 'password'
|
|
);
|
|
|
|
$connect_string = "";
|
|
foreach ($components as $key => $val)
|
|
{
|
|
if (isset($this->$key) && $this->$key != '')
|
|
{
|
|
$connect_string .= " $val=".$this->$key;
|
|
}
|
|
}
|
|
return trim($connect_string);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Non-persistent database connection
|
|
*
|
|
* @access private called by the base class
|
|
* @return resource
|
|
*/
|
|
function db_connect()
|
|
{
|
|
return @pg_connect($this->_connect_string());
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Persistent database connection
|
|
*
|
|
* @access private called by the base class
|
|
* @return resource
|
|
*/
|
|
function db_pconnect()
|
|
{
|
|
return @pg_pconnect($this->_connect_string());
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Reconnect
|
|
*
|
|
* Keep / reestablish the db connection if no queries have been
|
|
* sent for a length of time exceeding the server's idle timeout
|
|
*
|
|
* @access public
|
|
* @return void
|
|
*/
|
|
function reconnect()
|
|
{
|
|
if (pg_ping($this->conn_id) === FALSE)
|
|
{
|
|
$this->conn_id = FALSE;
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Select the database
|
|
*
|
|
* @access private called by the base class
|
|
* @return resource
|
|
*/
|
|
function db_select()
|
|
{
|
|
// Not needed for Postgre so we'll return TRUE
|
|
return TRUE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Set client character set
|
|
*
|
|
* @access public
|
|
* @param string
|
|
* @param string
|
|
* @return resource
|
|
*/
|
|
function db_set_charset($charset, $collation)
|
|
{
|
|
// @todo - add support if needed
|
|
return TRUE;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Version number query string
|
|
*
|
|
* @access public
|
|
* @return string
|
|
*/
|
|
function _version()
|
|
{
|
|
return "SELECT version() AS ver";
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Execute the query
|
|
*
|
|
* @access private called by the base class
|
|
* @param string an SQL query
|
|
* @return resource
|
|
*/
|
|
function _execute($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($this->conn_id, "rollback");
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Escape String
|
|
*
|
|
* @access public
|
|
* @param string
|
|
* @param bool whether or not the string will be used in a LIKE condition
|
|
* @return string
|
|
*/
|
|
function escape_str($str, $like = FALSE)
|
|
{
|
|
if (is_array($str))
|
|
{
|
|
foreach ($str as $key => $val)
|
|
{
|
|
$str[$key] = $this->escape_str($val, $like);
|
|
}
|
|
|
|
return $str;
|
|
}
|
|
|
|
$str = pg_escape_string($str);
|
|
|
|
// escape LIKE condition wildcards
|
|
if ($like === TRUE)
|
|
{
|
|
$str = str_replace( array('%', '_', $this->_like_escape_chr),
|
|
array($this->_like_escape_chr.'%', $this->_like_escape_chr.'_', $this->_like_escape_chr.$this->_like_escape_chr),
|
|
$str);
|
|
}
|
|
|
|
return $str;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Affected Rows
|
|
*
|
|
* @access public
|
|
* @return integer
|
|
*/
|
|
function affected_rows()
|
|
{
|
|
return @pg_affected_rows($this->result_id);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert ID
|
|
*
|
|
* @access public
|
|
* @return integer
|
|
*/
|
|
function insert_id()
|
|
{
|
|
$v = $this->_version();
|
|
$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 = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
|
|
|
|
if ($query->num_rows() == 0)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
$row = $query->row();
|
|
$this->_reset_select();
|
|
return (int) $row->numrows;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Show table query
|
|
*
|
|
* Generates a platform-specific query string so that the table names can be fetched
|
|
*
|
|
* @access private
|
|
* @param boolean
|
|
* @return string
|
|
*/
|
|
function _list_tables($prefix_limit = FALSE)
|
|
{
|
|
$sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = 'public'";
|
|
|
|
if ($prefix_limit !== FALSE AND $this->dbprefix != '')
|
|
{
|
|
$sql .= " AND table_name LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Show column query
|
|
*
|
|
* Generates a platform-specific query string so that the column names can be fetched
|
|
*
|
|
* @access public
|
|
* @param string the table name
|
|
* @return string
|
|
*/
|
|
function _list_columns($table = '')
|
|
{
|
|
return "SELECT column_name FROM information_schema.columns WHERE table_name ='".$table."'";
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Field data query
|
|
*
|
|
* Generates a platform-specific query so that the column data can be retrieved
|
|
*
|
|
* @access public
|
|
* @param string the table name
|
|
* @return object
|
|
*/
|
|
function _field_data($table)
|
|
{
|
|
return "SELECT * FROM ".$table." LIMIT 1";
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* The error message string
|
|
*
|
|
* @access private
|
|
* @return string
|
|
*/
|
|
function _error_message()
|
|
{
|
|
return pg_last_error($this->conn_id);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* The error message number
|
|
*
|
|
* @access private
|
|
* @return integer
|
|
*/
|
|
function _error_number()
|
|
{
|
|
return '';
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Escape the SQL Identifiers
|
|
*
|
|
* This function escapes column and table names
|
|
*
|
|
* @access private
|
|
* @param string
|
|
* @return string
|
|
*/
|
|
function _escape_identifiers($item)
|
|
{
|
|
if ($this->_escape_char == '')
|
|
{
|
|
return $item;
|
|
}
|
|
|
|
foreach ($this->_reserved_identifiers as $id)
|
|
{
|
|
if (strpos($item, '.'.$id) !== FALSE)
|
|
{
|
|
$str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
|
|
|
|
// remove duplicates if the user already included the escape
|
|
return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
|
|
}
|
|
}
|
|
|
|
if (strpos($item, '.') !== FALSE)
|
|
{
|
|
$str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;
|
|
}
|
|
else
|
|
{
|
|
$str = $this->_escape_char.$item.$this->_escape_char;
|
|
}
|
|
|
|
// remove duplicates if the user already included the escape
|
|
return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* From Tables
|
|
*
|
|
* This function implicitly groups FROM tables so there is no confusion
|
|
* about operator precedence in harmony with SQL standards
|
|
*
|
|
* @access public
|
|
* @param type
|
|
* @return type
|
|
*/
|
|
function _from_tables($tables)
|
|
{
|
|
if ( ! is_array($tables))
|
|
{
|
|
$tables = array($tables);
|
|
}
|
|
|
|
return implode(', ', $tables);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert statement
|
|
*
|
|
* Generates a platform-specific insert string from the supplied data
|
|
*
|
|
* @access public
|
|
* @param string the table name
|
|
* @param array the insert keys
|
|
* @param array the insert values
|
|
* @return string
|
|
*/
|
|
function _insert($table, $keys, $values)
|
|
{
|
|
return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Insert_batch statement
|
|
*
|
|
* Generates a platform-specific insert string from the supplied data
|
|
*
|
|
* @access public
|
|
* @param string the table name
|
|
* @param array the insert keys
|
|
* @param array the insert values
|
|
* @return string
|
|
*/
|
|
function _insert_batch($table, $keys, $values)
|
|
{
|
|
return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values);
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Update statement
|
|
*
|
|
* Generates a platform-specific update string from the supplied data
|
|
*
|
|
* @access public
|
|
* @param string the table name
|
|
* @param array the update data
|
|
* @param array the where clause
|
|
* @param array the orderby clause
|
|
* @param array the limit clause
|
|
* @return string
|
|
*/
|
|
function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
|
|
{
|
|
foreach ($values as $key => $val)
|
|
{
|
|
$valstr[] = $key." = ".$val;
|
|
}
|
|
|
|
$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
|
|
|
|
$orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
|
|
|
|
$sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
|
|
|
|
$sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
|
|
|
|
$sql .= $orderby.$limit;
|
|
|
|
return $sql;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Truncate statement
|
|
*
|
|
* Generates a platform-specific truncate string from the supplied data
|
|
* If the database does not support the truncate() command
|
|
* This function maps to "DELETE FROM table"
|
|
*
|
|
* @access public
|
|
* @param string the table name
|
|
* @return string
|
|
*/
|
|
function _truncate($table)
|
|
{
|
|
return "TRUNCATE ".$table;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
/**
|
|
* Delete statement
|
|
*
|
|
* Generates a platform-specific delete string from the supplied data
|
|
*
|
|
* @access public
|
|
* @param string the table name
|
|
* @param array the where clause
|
|
* @param string the limit clause
|
|
* @return string
|
|
*/
|
|
function _delete($table, $where = array(), $like = array(), $limit = FALSE)
|
|
{
|
|
$conditions = '';
|
|
|
|
if (count($where) > 0 OR count($like) > 0)
|
|
{
|
|
$conditions = "\nWHERE ";
|
|
$conditions .= implode("\n", $this->ar_where);
|
|
|
|
if (count($where) > 0 && count($like) > 0)
|
|
{
|
|
$conditions .= " AND ";
|
|
}
|
|
$conditions .= implode("\n", $like);
|
|
}
|
|
|
|
$limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
|
|
|
|
return "DELETE FROM ".$table.$conditions.$limit;
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
/**
|
|
* Limit string
|
|
*
|
|
* Generates a platform-specific LIMIT clause
|
|
*
|
|
* @access public
|
|
* @param string the sql query string
|
|
* @param integer the number of rows to limit the query to
|
|
* @param integer the offset value
|
|
* @return string
|
|
*/
|
|
function _limit($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);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
/* End of file postgre_driver.php */
|
|
/* Location: ./system/database/drivers/postgre/postgre_driver.php */ |