281 lines
6.4 KiB
PHP
281 lines
6.4 KiB
PHP
<?php
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/**
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* FuzeWorks.
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*
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* The FuzeWorks MVC PHP FrameWork
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*
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* Copyright (C) 2015 TechFuze
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @author TechFuze
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* @copyright Copyright (c) 2013 - 2016, Techfuze. (http://techfuze.net)
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* @copyright Copyright (c) 1996 - 2015, Free Software Foundation, Inc. (http://www.fsf.org/)
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* @license http://opensource.org/licenses/GPL-3.0 GPLv3 License
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*
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* @link http://techfuze.net/fuzeworks
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* @since Version 0.0.1
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*
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* @version Version 1.0.0
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*/
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/**
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* PDO ODBC Database Adapter Class
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*
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* Note: _DB is an extender class that the app controller
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* creates dynamically based on whether the query builder
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* class is being used or not.
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*
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* Converted from CodeIgniter.
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*
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* @package FuzeWorks
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* @subpackage Drivers
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/database/
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* @license http://opensource.org/licenses/MIT MIT License
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*/
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class FW_DB_pdo_odbc_driver extends FW_DB_pdo_driver {
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/**
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* Sub-driver
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*
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* @var string
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*/
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public $subdriver = 'odbc';
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/**
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* Database schema
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*
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* @var string
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*/
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public $schema = 'public';
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// --------------------------------------------------------------------
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/**
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* Identifier escape character
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*
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* Must be empty for ODBC.
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*
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* @var string
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*/
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protected $_escape_char = '';
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/**
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* ESCAPE statement string
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*
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* @var string
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*/
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protected $_like_escape_str = " {escape '%s'} ";
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/**
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* ORDER BY random keyword
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*
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* @var array
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*/
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protected $_random_keyword = array('RND()', 'RND(%d)');
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// --------------------------------------------------------------------
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/**
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* Class constructor
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*
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* Builds the DSN if not already set.
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*
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* @param array $params
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* @return void
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*/
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public function __construct($params)
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{
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parent::__construct($params);
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if (empty($this->dsn))
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{
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$this->dsn = 'odbc:';
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// Pre-defined DSN
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if (empty($this->hostname) && empty($this->HOSTNAME) && empty($this->port) && empty($this->PORT))
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{
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if (isset($this->DSN))
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{
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$this->dsn .= 'DSN='.$this->DSN;
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}
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elseif ( ! empty($this->database))
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{
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$this->dsn .= 'DSN='.$this->database;
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}
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return;
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}
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// If the DSN is not pre-configured - try to build an IBM DB2 connection string
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$this->dsn .= 'DRIVER='.(isset($this->DRIVER) ? '{'.$this->DRIVER.'}' : '{IBM DB2 ODBC DRIVER}').';';
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if (isset($this->DATABASE))
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{
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$this->dsn .= 'DATABASE='.$this->DATABASE.';';
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}
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elseif ( ! empty($this->database))
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{
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$this->dsn .= 'DATABASE='.$this->database.';';
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}
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if (isset($this->HOSTNAME))
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{
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$this->dsn .= 'HOSTNAME='.$this->HOSTNAME.';';
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}
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else
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{
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$this->dsn .= 'HOSTNAME='.(empty($this->hostname) ? '127.0.0.1;' : $this->hostname.';');
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}
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if (isset($this->PORT))
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{
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$this->dsn .= 'PORT='.$this->port.';';
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}
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elseif ( ! empty($this->port))
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{
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$this->dsn .= ';PORT='.$this->port.';';
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}
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$this->dsn .= 'PROTOCOL='.(isset($this->PROTOCOL) ? $this->PROTOCOL.';' : 'TCPIP;');
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}
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}
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// --------------------------------------------------------------------
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/**
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* Determines if a query is a "write" type.
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*
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* @param string An SQL query string
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* @return bool
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*/
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public function is_write_type($sql)
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{
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if (preg_match('#^(INSERT|UPDATE).*RETURNING\s.+(\,\s?.+)*$#i', $sql))
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{
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return FALSE;
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}
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return parent::is_write_type($sql);
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}
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// --------------------------------------------------------------------
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/**
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* Show table query
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*
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* Generates a platform-specific query string so that the table names can be fetched
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*
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* @param bool $prefix_limit
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* @return string
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*/
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protected function _list_tables($prefix_limit = FALSE)
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{
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$sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = '".$this->schema."'";
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if ($prefix_limit !== FALSE && $this->dbprefix !== '')
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{
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return $sql." AND table_name LIKE '".$this->escape_like_str($this->dbprefix)."%' "
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.sprintf($this->_like_escape_str, $this->_like_escape_chr);
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}
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return $sql;
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}
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// --------------------------------------------------------------------
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/**
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* Show column query
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*
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* Generates a platform-specific query string so that the column names can be fetched
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*
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* @param string $table
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* @return string
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*/
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protected function _list_columns($table = '')
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{
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return 'SELECT column_name FROM information_schema.columns WHERE table_name = '.$this->escape($table);
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}
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// --------------------------------------------------------------------
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/**
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* Update statement
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*
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* Generates a platform-specific update string from the supplied data
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*
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* @param string $table
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* @param array $values
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* @return string
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*/
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protected function _update($table, $values)
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{
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$this->qb_limit = FALSE;
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$this->qb_orderby = array();
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return parent::_update($table, $values);
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}
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// --------------------------------------------------------------------
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/**
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* Truncate statement
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*
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* Generates a platform-specific truncate string from the supplied data
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*
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* If the database does not support the TRUNCATE statement,
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* then this method maps to 'DELETE FROM table'
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*
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* @param string $table
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* @return string
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*/
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protected function _truncate($table)
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{
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return 'DELETE FROM '.$table;
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}
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// --------------------------------------------------------------------
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/**
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* Delete statement
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*
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* Generates a platform-specific delete string from the supplied data
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*
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* @param string the table name
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* @return string
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*/
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protected function _delete($table)
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{
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$this->qb_limit = FALSE;
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return parent::_delete($table);
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}
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// --------------------------------------------------------------------
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/**
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* LIMIT
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*
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* Generates a platform-specific LIMIT clause
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*
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* @param string $sql SQL Query
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* @return string
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*/
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protected function _limit($sql)
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{
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return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$this->qb_limit.' ', $sql);
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}
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}
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