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<?php
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.2.4 or newer
*
* NOTICE OF LICENSE
*
* Licensed under the Open Software License version 3.0
*
* This source file is subject to the Open Software License (OSL 3.0) that is
* bundled with this package in the files license.txt / license.rst. It is
* also available through the world wide web at this URL:
* http://opensource.org/licenses/OSL-3.0
* If you did not receive a copy of the license and are unable to obtain it
* through the world wide web, please send an email to
* licensing@ellislab.com so we can send you a copy immediately.
*
* @package CodeIgniter
* @author EllisLab Dev Team
* @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
* @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
* @link http://codeigniter.com
* @since Version 3.0.0
* @filesource
*/
defined('BASEPATH') OR exit('No direct script access allowed');
/**
* PDO PostgreSQL Database Adapter Class
*
* Note: _DB is an extender class that the app controller
* creates dynamically based on whether the query builder
* class is being used or not.
*
* @package CodeIgniter
* @subpackage Drivers
* @category Database
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
class CI_DB_pdo_pgsql_driver extends CI_DB_pdo_driver {
/**
* Sub-driver
*
* @var string
*/
public $subdriver = 'pgsql';
/**
* Database schema
*
* @var string
*/
public $schema = 'public';
// --------------------------------------------------------------------
/**
* ORDER BY random keyword
*
* @var array
*/
protected $_random_keyword = array('RANDOM()', 'RANDOM()');
// --------------------------------------------------------------------
/**
* Class constructor
*
* Builds the DSN if not already set.
*
* @param array $params
* @return void
*/
public function __construct($params)
{
parent::__construct($params);
if (empty($this->dsn))
{
$this->dsn = 'pgsql:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
empty($this->port) OR $this->dsn .= ';port='.$this->port;
empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
}
}
// --------------------------------------------------------------------
/**
* Database connection
*
* @param bool $persistent
* @return object
*/
public function db_connect($persistent = FALSE)
{
$this->conn_id = parent::db_connect($persistent);
if (is_object($this->conn_id) && ! empty($this->schema))
{
$this->simple_query('SET search_path TO '.$this->schema.',public');
}
return $this->conn_id;
}
// --------------------------------------------------------------------
/**
* Insert ID
*
* @param string $name
* @return int
*/
public function insert_id($name = NULL)
{
if ($name === NULL && version_compare($this->version(), '8.1', '>='))
{
$query = $this->query('SELECT LASTVAL() AS ins_id');
$query = $query->row();
return $query->ins_id;
}
return $this->conn_id->lastInsertId($name);
}
// --------------------------------------------------------------------
/**
* "Smart" Escape String
*
* Escapes data based on type
*
* @param string $str
* @return mixed
*/
public function escape($str)
{
if (is_bool($str))
{
return ($str) ? 'TRUE' : 'FALSE';
}
return parent::escape($str);
}
// --------------------------------------------------------------------
/**
* ORDER BY
*
* @param string $orderby
* @param string $direction ASC or DESC
* @param bool $escape
* @return object
*/
public function order_by($orderby, $direction = '', $escape = NULL)
{
$direction = strtoupper(trim($direction));
if ($direction === 'RANDOM')
{
if ( ! is_float($orderby) && ctype_digit((string) $orderby))
{
$orderby = ($orderby > 1)
? (float) '0.'.$orderby
: (float) $orderby;
}
if (is_float($orderby))
{
$this->simple_query('SET SEED '.$orderby);
}
$orderby = $this->_random_keyword[0];
$direction = '';
$escape = FALSE;
}
return parent::order_by($orderby, $direction, $escape);
}
// --------------------------------------------------------------------
/**
* Show table query
*
* Generates a platform-specific query string so that the table names can be fetched
*
* @param bool $prefix_limit
* @return string
*/
protected function _list_tables($prefix_limit = FALSE)
{
$sql = 'SELECT "table_name" FROM "information_schema"."tables" WHERE "table_schema" = \''.$this->schema."'";
if ($prefix_limit === TRUE && $this->dbprefix !== '')
{
return $sql.' AND "table_name" LIKE \''
.$this->escape_like_str($this->dbprefix)."%' "
.sprintf($this->_like_escape_str, $this->_like_escape_chr);
}
return $sql;
}
// --------------------------------------------------------------------
/**
* List column query
*
* Generates a platform-specific query string so that the column names can be fetched
*
* @param string $table
* @return string
*/
protected function _list_columns($table = '')
{
return 'SELECT "column_name"
FROM "information_schema"."columns"
WHERE LOWER("table_name") = '.$this->escape(strtolower($table));
}
// --------------------------------------------------------------------
/**
* Returns an object with field data
*
* @param string $table
* @return array
*/
public function field_data($table = '')
{
if ($table === '')
{
return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
}
$sql = 'SELECT "column_name", "data_type", "character_maximum_length", "numeric_precision", "column_default"
FROM "information_schema"."columns"
WHERE LOWER("table_name") = '.$this->escape(strtolower($table));
if (($query = $this->query($sql)) === FALSE)
{
return FALSE;
}
$query = $query->result_object();
$retval = array();
for ($i = 0, $c = count($query); $i < $c; $i++)
{
$retval[$i] = new stdClass();
$retval[$i]->name = $query[$i]->column_name;
$retval[$i]->type = $query[$i]->data_type;
$retval[$i]->max_length = ($query[$i]->character_maximum_length > 0) ? $query[$i]->character_maximum_length : $query[$i]->numeric_precision;
$retval[$i]->default = $query[$i]->column_default;
}
return $retval;
}
// --------------------------------------------------------------------
/**
* Update statement
*
* Generates a platform-specific update string from the supplied data
*
* @param string $table
* @param array $values
* @return string
*/
protected function _update($table, $values)
{
$this->qb_limit = FALSE;
$this->qb_orderby = array();
return parent::_update($table, $values);
}
// --------------------------------------------------------------------
/**
* Update_Batch statement
*
* Generates a platform-specific batch update string from the supplied data
*
* @param string $table Table name
* @param array $values Update data
* @param string $index WHERE key
* @return string
*/
protected function _update_batch($table, $values, $index)
{
$ids = array();
foreach ($values as $key => $val)
{
$ids[] = $val[$index];
foreach (array_keys($val) as $field)
{
if ($field !== $index)
{
$final[$field][] = 'WHEN '.$val[$index].' THEN '.$val[$field];
}
}
}
$cases = '';
foreach ($final as $k => $v)
{
$cases .= $k.' = (CASE '.$index."\n"
.implode("\n", $v)."\n"
.'ELSE '.$k.' END), ';
}
$this->where($index.' IN('.implode(',', $ids).')', NULL, FALSE);
return 'UPDATE '.$table.' SET '.substr($cases, 0, -2).$this->_compile_wh('qb_where');
}
// --------------------------------------------------------------------
/**
* Delete statement
*
* Generates a platform-specific delete string from the supplied data
*
* @param string $table
* @return string
*/
protected function _delete($table)
{
$this->qb_limit = FALSE;
return parent::_delete($table);
}
// --------------------------------------------------------------------
/**
* LIMIT
*
* Generates a platform-specific LIMIT clause
*
* @param string $sql SQL Query
* @return string
*/
protected function _limit($sql)
{
return $sql.' LIMIT '.$this->qb_limit.($this->qb_offset ? ' OFFSET '.$this->qb_offset : '');
}
}
/* End of file pdo_pgsql_driver.php */
/* Location: ./system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php */
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