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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2018, British Columbia Institute of Technology * * 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 - 2018, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 3.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * PDO Oracle 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/user_guide/database/ */ class CI_DB_pdo_oci_driver extends CI_DB_pdo_driver { /** * Sub-driver * * @var string */ public $subdriver = 'oci'; // -------------------------------------------------------------------- /** * List of reserved identifiers * * Identifiers that must NOT be escaped. * * @var string[] */ protected $_reserved_identifiers = array('*', 'rownum'); /** * ORDER BY random keyword * * @var array */ protected $_random_keyword = array('ASC', 'ASC'); // Currently not supported /** * COUNT string * * @used-by CI_DB_driver::count_all() * @used-by CI_DB_query_builder::count_all_results() * * @var string */ protected $_count_string = 'SELECT COUNT(1) AS '; // -------------------------------------------------------------------- /** * 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)) { $this->dsn = 'oci:dbname='; // Oracle has a slightly different PDO DSN format (Easy Connect), // which also supports pre-defined DSNs. if (empty($this->hostname) && empty($this->port)) { $this->dsn .= $this->database; } else { $this->dsn .= '//'.(empty($this->hostname) ? '127.0.0.1' : $this->hostname) .(empty($this->port) ? '' : ':'.$this->port).'/'; empty($this->database) OR $this->dsn .= $this->database; } empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set; } elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 4) === FALSE) { $this->dsn .= ';charset='.$this->char_set; } } // -------------------------------------------------------------------- /** * Database version number * * @return string */ public function version() { if (isset($this->data_cache['version'])) { return $this->data_cache['version']; } $version_string = parent::version(); if (preg_match('#Release\s(?<version>\d+(?:\.\d+)+)#', $version_string, $match)) { return $this->data_cache['version'] = $match[1]; } return FALSE; } // -------------------------------------------------------------------- /** * 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) { $sql = 'SELECT "TABLE_NAME" FROM "ALL_TABLES"'; if ($prefix_limit === TRUE && $this->dbprefix !== '') { return $sql.' WHERE "TABLE_NAME" LIKE \''.$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 * * @param string $table * @return string */ protected function _list_columns($table = '') { if (strpos($table, '.') !== FALSE) { sscanf($table, '%[^.].%s', $owner, $table); } else { $owner = $this->username; } return 'SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).' AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table)); } // -------------------------------------------------------------------- /** * Returns an object with field data * * @param string $table * @return array */ public function field_data($table) { if (strpos($table, '.') !== FALSE) { sscanf($table, '%[^.].%s', $owner, $table); } else { $owner = $this->username; } $sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHAR_LENGTH, DATA_PRECISION, DATA_LENGTH, DATA_DEFAULT, NULLABLE FROM ALL_TAB_COLUMNS WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).' AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table)); if (($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; $length = ($query[$i]->CHAR_LENGTH > 0) ? $query[$i]->CHAR_LENGTH : $query[$i]->DATA_PRECISION; if ($length === NULL) { $length = $query[$i]->DATA_LENGTH; } $retval[$i]->max_length = $length; $default = $query[$i]->DATA_DEFAULT; if ($default === NULL && $query[$i]->NULLABLE === 'N') { $default = ''; } $retval[$i]->default = $query[$i]->COLUMN_DEFAULT; } return $retval; } // -------------------------------------------------------------------- /** * Insert batch statement * * @param string $table Table name * @param array $keys INSERT keys * @param array $values INSERT values * @return string */ protected function _insert_batch($table, $keys, $values) { $keys = implode(', ', $keys); $sql = "INSERT ALL\n"; for ($i = 0, $c = count($values); $i < $c; $i++) { $sql .= ' INTO '.$table.' ('.$keys.') VALUES '.$values[$i]."\n"; } return $sql.'SELECT * FROM dual'; } // -------------------------------------------------------------------- /** * Delete statement * * Generates a platform-specific delete string from the supplied data * * @param string $table * @return string */ protected function _delete($table) { if ($this->qb_limit) { $this->where('rownum <= ',$this->qb_limit, FALSE); $this->qb_limit = FALSE; } return parent::_delete($table); } // -------------------------------------------------------------------- /** * LIMIT * * Generates a platform-specific LIMIT clause * * @param string $sql SQL Query * @return string */ protected function _limit($sql) { if (version_compare($this->version(), '12.1', '>=')) { // OFFSET-FETCH can be used only with the ORDER BY clause empty($this->qb_orderby) && $sql .= ' ORDER BY 1'; return $sql.' OFFSET '.(int) $this->qb_offset.' ROWS FETCH NEXT '.$this->qb_limit.' ROWS ONLY'; } return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($this->qb_offset + $this->qb_limit + 1).')' .($this->qb_offset ? ' WHERE rnum >= '.($this->qb_offset + 1): ''); } }