323 lines
7.8 KiB
PHP
323 lines
7.8 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 Oracle 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_oci_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 = 'oci';
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// --------------------------------------------------------------------
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/**
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* List of reserved identifiers
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*
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* Identifiers that must NOT be escaped.
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*
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* @var string[]
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*/
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protected $_reserved_identifiers = array('*', 'rownum');
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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('ASC', 'ASC'); // Currently not supported
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/**
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* COUNT string
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*
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* @used-by FW_DB_driver::count_all()
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* @used-by FW_DB_query_builder::count_all_results()
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*
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* @var string
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*/
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protected $_count_string = 'SELECT COUNT(1) AS ';
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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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$this->dsn = 'oci:dbname=';
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// Oracle has a slightly different PDO DSN format (Easy Connect),
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// which also supports pre-defined DSNs.
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if (empty($this->hostname) && empty($this->port))
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{
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$this->dsn .= $this->database;
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}
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else
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{
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$this->dsn .= '//'.(empty($this->hostname) ? '127.0.0.1' : $this->hostname)
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.(empty($this->port) ? '' : ':'.$this->port).'/';
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empty($this->database) OR $this->dsn .= $this->database;
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}
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empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
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}
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elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 4) === FALSE)
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{
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$this->dsn .= ';charset='.$this->char_set;
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}
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}
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// --------------------------------------------------------------------
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/**
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* Database version number
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*
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* @return string
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*/
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public function version()
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{
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if (isset($this->data_cache['version']))
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{
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return $this->data_cache['version'];
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}
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$version_string = parent::version();
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if (preg_match('#Release\s(?<version>\d+(?:\.\d+)+)#', $version_string, $match))
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{
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return $this->data_cache['version'] = $match[1];
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}
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return FALSE;
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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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$sql = 'SELECT "TABLE_NAME" FROM "ALL_TABLES"';
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if ($prefix_limit === TRUE && $this->dbprefix !== '')
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{
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return $sql.' WHERE "TABLE_NAME" LIKE \''.$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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if (strpos($table, '.') !== FALSE)
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{
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sscanf($table, '%[^.].%s', $owner, $table);
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}
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else
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{
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$owner = $this->username;
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}
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return 'SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS
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WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).'
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AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
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}
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// --------------------------------------------------------------------
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/**
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* Returns an object with field data
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*
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* @param string $table
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* @return array
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*/
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public function field_data($table)
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{
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if (strpos($table, '.') !== FALSE)
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{
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sscanf($table, '%[^.].%s', $owner, $table);
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}
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else
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{
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$owner = $this->username;
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}
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$sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHAR_LENGTH, DATA_PRECISION, DATA_LENGTH, DATA_DEFAULT, NULLABLE
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FROM ALL_TAB_COLUMNS
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WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).'
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AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
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if (($query = $this->query($sql)) === FALSE)
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{
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return FALSE;
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}
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$query = $query->result_object();
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$retval = array();
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for ($i = 0, $c = count($query); $i < $c; $i++)
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{
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$retval[$i] = new stdClass();
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$retval[$i]->name = $query[$i]->COLUMN_NAME;
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$retval[$i]->type = $query[$i]->DATA_TYPE;
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$length = ($query[$i]->CHAR_LENGTH > 0)
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? $query[$i]->CHAR_LENGTH : $query[$i]->DATA_PRECISION;
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if ($length === NULL)
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{
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$length = $query[$i]->DATA_LENGTH;
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}
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$retval[$i]->max_length = $length;
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$default = $query[$i]->DATA_DEFAULT;
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if ($default === NULL && $query[$i]->NULLABLE === 'N')
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{
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$default = '';
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}
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$retval[$i]->default = $query[$i]->COLUMN_DEFAULT;
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}
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return $retval;
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}
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// --------------------------------------------------------------------
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/**
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* Insert batch statement
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*
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* @param string $table Table name
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* @param array $keys INSERT keys
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* @param array $values INSERT values
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* @return string
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*/
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protected function _insert_batch($table, $keys, $values)
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{
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$keys = implode(', ', $keys);
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$sql = "INSERT ALL\n";
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for ($i = 0, $c = count($values); $i < $c; $i++)
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{
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$sql .= ' INTO '.$table.' ('.$keys.') VALUES '.$values[$i]."\n";
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}
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return $sql.'SELECT * FROM dual';
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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 $table
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* @return string
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*/
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protected function _delete($table)
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{
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if ($this->qb_limit)
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{
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$this->where('rownum <= ',$this->qb_limit, FALSE);
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$this->qb_limit = FALSE;
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}
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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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if (version_compare($this->version(), '12.1', '>='))
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{
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// OFFSET-FETCH can be used only with the ORDER BY clause
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empty($this->qb_orderby) && $sql .= ' ORDER BY 1';
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return $sql.' OFFSET '.(int) $this->qb_offset.' ROWS FETCH NEXT '.$this->qb_limit.' ROWS ONLY';
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}
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return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($this->qb_offset + $this->qb_limit + 1).')'
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.($this->qb_offset ? ' WHERE rnum >= '.($this->qb_offset + 1): '');
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}
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}
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