612 lines
14 KiB
PHP
612 lines
14 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* CodeIgniter
|
||
|
|
*
|
||
|
|
* An open source application development framework for PHP
|
||
|
|
*
|
||
|
|
* This content is released under the MIT License (MIT)
|
||
|
|
*
|
||
|
|
* Copyright (c) 2019 - 2022, CodeIgniter Foundation
|
||
|
|
*
|
||
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
* of this software and associated documentation files (the "Software"), to deal
|
||
|
|
* in the Software without restriction, including without limitation the rights
|
||
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
* copies of the Software, and to permit persons to whom the Software is
|
||
|
|
* furnished to do so, subject to the following conditions:
|
||
|
|
*
|
||
|
|
* The above copyright notice and this permission notice shall be included in
|
||
|
|
* all copies or substantial portions of the Software.
|
||
|
|
*
|
||
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
* THE SOFTWARE.
|
||
|
|
*
|
||
|
|
* @package CodeIgniter
|
||
|
|
* @author EllisLab Dev Team
|
||
|
|
* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
|
||
|
|
* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
|
||
|
|
* @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/)
|
||
|
|
* @license https://opensource.org/licenses/MIT MIT License
|
||
|
|
* @link https://codeigniter.com
|
||
|
|
* @since Version 1.3.0
|
||
|
|
* @filesource
|
||
|
|
*/
|
||
|
|
defined('BASEPATH') OR exit('No direct script access allowed');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Postgre 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 https://codeigniter.com/userguide3/database/
|
||
|
|
*/
|
||
|
|
class CI_DB_postgre_driver extends CI_DB {
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database driver
|
||
|
|
*
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
public $dbdriver = 'postgre';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database schema
|
||
|
|
*
|
||
|
|
* @var string
|
||
|
|
*/
|
||
|
|
public $schema = 'public';
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ORDER BY random keyword
|
||
|
|
*
|
||
|
|
* @var array
|
||
|
|
*/
|
||
|
|
protected $_random_keyword = array('RANDOM()', 'RANDOM()');
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Build DSN
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
protected function _build_dsn()
|
||
|
|
{
|
||
|
|
$this->dsn === '' OR $this->dsn = '';
|
||
|
|
|
||
|
|
if (strpos($this->hostname, '/') !== FALSE)
|
||
|
|
{
|
||
|
|
// If UNIX sockets are used, we shouldn't set a port
|
||
|
|
$this->port = '';
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->hostname === '' OR $this->dsn = 'host='.$this->hostname.' ';
|
||
|
|
|
||
|
|
if ( ! empty($this->port) && ctype_digit($this->port))
|
||
|
|
{
|
||
|
|
$this->dsn .= 'port='.$this->port.' ';
|
||
|
|
}
|
||
|
|
|
||
|
|
if ($this->username !== '')
|
||
|
|
{
|
||
|
|
$this->dsn .= 'user='.$this->username.' ';
|
||
|
|
|
||
|
|
/* An empty password is valid!
|
||
|
|
*
|
||
|
|
* $db['password'] = NULL must be done in order to ignore it.
|
||
|
|
*/
|
||
|
|
$this->password === NULL OR $this->dsn .= "password='".$this->password."' ";
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->database === '' OR $this->dsn .= 'dbname='.$this->database.' ';
|
||
|
|
|
||
|
|
/* We don't have these options as elements in our standard configuration
|
||
|
|
* array, but they might be set by parse_url() if the configuration was
|
||
|
|
* provided via string. Example:
|
||
|
|
*
|
||
|
|
* postgre://username:password@localhost:5432/database?connect_timeout=5&sslmode=1
|
||
|
|
*/
|
||
|
|
foreach (array('connect_timeout', 'options', 'sslmode', 'service') as $key)
|
||
|
|
{
|
||
|
|
if (isset($this->$key) && is_string($this->$key) && $this->$key !== '')
|
||
|
|
{
|
||
|
|
$this->dsn .= $key."='".$this->$key."' ";
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->dsn = rtrim($this->dsn);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database connection
|
||
|
|
*
|
||
|
|
* @param bool $persistent
|
||
|
|
* @return resource|object
|
||
|
|
*/
|
||
|
|
public function db_connect($persistent = FALSE)
|
||
|
|
{
|
||
|
|
empty($this->dsn) && $this->_build_dsn();
|
||
|
|
$this->conn_id = ($persistent === TRUE)
|
||
|
|
? pg_pconnect($this->dsn)
|
||
|
|
: pg_connect($this->dsn);
|
||
|
|
|
||
|
|
if ($this->conn_id !== FALSE)
|
||
|
|
{
|
||
|
|
if ($persistent === TRUE
|
||
|
|
&& pg_connection_status($this->conn_id) === PGSQL_CONNECTION_BAD
|
||
|
|
&& pg_ping($this->conn_id) === FALSE
|
||
|
|
)
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
empty($this->schema) OR $this->simple_query('SET search_path TO '.$this->schema.',public');
|
||
|
|
}
|
||
|
|
|
||
|
|
return $this->conn_id;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reconnect
|
||
|
|
*
|
||
|
|
* Keep / reestablish the db connection if no queries have been
|
||
|
|
* sent for a length of time exceeding the server's idle timeout
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
public function reconnect()
|
||
|
|
{
|
||
|
|
if (pg_ping($this->conn_id) === FALSE)
|
||
|
|
{
|
||
|
|
$this->conn_id = FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Set client character set
|
||
|
|
*
|
||
|
|
* @param string $charset
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _db_set_charset($charset)
|
||
|
|
{
|
||
|
|
return (pg_set_client_encoding($this->conn_id, $charset) === 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Database version number
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function version()
|
||
|
|
{
|
||
|
|
if (isset($this->data_cache['version']))
|
||
|
|
{
|
||
|
|
return $this->data_cache['version'];
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( ! $this->conn_id OR ($pg_version = pg_version($this->conn_id)) === FALSE)
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* If PHP was compiled with PostgreSQL lib versions earlier
|
||
|
|
* than 7.4, pg_version() won't return the server version
|
||
|
|
* and so we'll have to fall back to running a query in
|
||
|
|
* order to get it.
|
||
|
|
*/
|
||
|
|
return (isset($pg_version['server']) && preg_match('#^(\d+\.\d+)#', $pg_version['server'], $match))
|
||
|
|
? $this->data_cache['version'] = $match[1]
|
||
|
|
: parent::version();
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Execute the query
|
||
|
|
*
|
||
|
|
* @param string $sql an SQL query
|
||
|
|
* @return resource|object
|
||
|
|
*/
|
||
|
|
protected function _execute($sql)
|
||
|
|
{
|
||
|
|
return pg_query($this->conn_id, $sql);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Begin Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _trans_begin()
|
||
|
|
{
|
||
|
|
return (bool) pg_query($this->conn_id, 'BEGIN');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Commit Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _trans_commit()
|
||
|
|
{
|
||
|
|
return (bool) pg_query($this->conn_id, 'COMMIT');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Rollback Transaction
|
||
|
|
*
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
protected function _trans_rollback()
|
||
|
|
{
|
||
|
|
return (bool) pg_query($this->conn_id, 'ROLLBACK');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determines if a query is a "write" type.
|
||
|
|
*
|
||
|
|
* @param string An SQL query string
|
||
|
|
* @return bool
|
||
|
|
*/
|
||
|
|
public function is_write_type($sql)
|
||
|
|
{
|
||
|
|
if (preg_match('#^(INSERT|UPDATE).*RETURNING\s.+(\,\s?.+)*$#is', $sql))
|
||
|
|
{
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
|
||
|
|
return parent::is_write_type($sql);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Platform-dependent string escape
|
||
|
|
*
|
||
|
|
* @param string
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
protected function _escape_str($str)
|
||
|
|
{
|
||
|
|
return pg_escape_string($this->conn_id, $str);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* "Smart" Escape String
|
||
|
|
*
|
||
|
|
* Escapes data based on type
|
||
|
|
*
|
||
|
|
* @param string $str
|
||
|
|
* @return mixed
|
||
|
|
*/
|
||
|
|
public function escape($str)
|
||
|
|
{
|
||
|
|
if (is_php('5.4.4') && (is_string($str) OR (is_object($str) && method_exists($str, '__toString'))))
|
||
|
|
{
|
||
|
|
return pg_escape_literal($this->conn_id, $str);
|
||
|
|
}
|
||
|
|
elseif (is_bool($str))
|
||
|
|
{
|
||
|
|
return ($str) ? 'TRUE' : 'FALSE';
|
||
|
|
}
|
||
|
|
|
||
|
|
return parent::escape($str);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Affected Rows
|
||
|
|
*
|
||
|
|
* @return int
|
||
|
|
*/
|
||
|
|
public function affected_rows()
|
||
|
|
{
|
||
|
|
return pg_affected_rows($this->result_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Insert ID
|
||
|
|
*
|
||
|
|
* @return string
|
||
|
|
*/
|
||
|
|
public function insert_id()
|
||
|
|
{
|
||
|
|
$v = $this->version();
|
||
|
|
|
||
|
|
$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)
|
||
|
|
{
|
||
|
|
if ($column !== NULL && $v >= '8.0')
|
||
|
|
{
|
||
|
|
$sql = 'SELECT pg_get_serial_sequence(\''.$table."', '".$column."') AS seq";
|
||
|
|
$query = $this->query($sql);
|
||
|
|
$query = $query->row();
|
||
|
|
$seq = $query->seq;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
// seq_name passed in table parameter
|
||
|
|
$seq = $table;
|
||
|
|
}
|
||
|
|
|
||
|
|
$sql = 'SELECT CURRVAL(\''.$seq."') AS ins_id";
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
return pg_last_oid($this->result_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
$query = $this->query($sql);
|
||
|
|
$query = $query->row();
|
||
|
|
return (int) $query->ins_id;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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 !== FALSE && $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 "table_schema" = \''.$this->schema.'\' AND LOWER("table_name") = '.$this->escape(strtolower($table));
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an object with field data
|
||
|
|
*
|
||
|
|
* @param string $table
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function field_data($table)
|
||
|
|
{
|
||
|
|
$sql = 'SELECT "column_name", "data_type", "character_maximum_length", "numeric_precision", "column_default"
|
||
|
|
FROM "information_schema"."columns"
|
||
|
|
WHERE "table_schema" = \''.$this->schema.'\' AND 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 $retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Error
|
||
|
|
*
|
||
|
|
* Returns an array containing code and message of the last
|
||
|
|
* database error that has occurred.
|
||
|
|
*
|
||
|
|
* @return array
|
||
|
|
*/
|
||
|
|
public function error()
|
||
|
|
{
|
||
|
|
return array('code' => '', 'message' => pg_last_error($this->conn_id));
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* ORDER BY
|
||
|
|
*
|
||
|
|
* @param string $orderby
|
||
|
|
* @param string $direction ASC, DESC or RANDOM
|
||
|
|
* @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);
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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]['value'];
|
||
|
|
|
||
|
|
foreach (array_keys($val) as $field)
|
||
|
|
{
|
||
|
|
if ($field !== $index)
|
||
|
|
{
|
||
|
|
$final[$val[$field]['field']][] = 'WHEN '.$val[$index]['value'].' THEN '.$val[$field]['value'];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
$cases = '';
|
||
|
|
foreach ($final as $k => $v)
|
||
|
|
{
|
||
|
|
$cases .= $k.' = (CASE '.$val[$index]['field']."\n"
|
||
|
|
.implode("\n", $v)."\n"
|
||
|
|
.'ELSE '.$k.' END), ';
|
||
|
|
}
|
||
|
|
|
||
|
|
$this->where($val[$index]['field'].' 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 : '');
|
||
|
|
}
|
||
|
|
|
||
|
|
// --------------------------------------------------------------------
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Close DB Connection
|
||
|
|
*
|
||
|
|
* @return void
|
||
|
|
*/
|
||
|
|
protected function _close()
|
||
|
|
{
|
||
|
|
pg_close($this->conn_id);
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|