Subversion-Projekte lars-tiefland.ci

<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
 * @license     https://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 4D Forge Class
 *
 * @category    Database
 * @author              EllisLab Dev Team
 * @link                https://codeigniter.com/user_guide/database/
 */
class CI_DB_pdo_4d_forge extends CI_DB_pdo_forge {

        /**
         * CREATE DATABASE statement
         *
         * @var string
         */
        protected $_create_database     = 'CREATE SCHEMA %s';

        /**
         * DROP DATABASE statement
         *
         * @var string
         */
        protected $_drop_database       = 'DROP SCHEMA %s';

        /**
         * CREATE TABLE IF statement
         *
         * @var string
         */
        protected $_create_table_if     = 'CREATE TABLE IF NOT EXISTS';

        /**
         * RENAME TABLE statement
         *
         * @var string
         */
        protected $_rename_table        = FALSE;

        /**
         * DROP TABLE IF statement
         *
         * @var string
         */
        protected $_drop_table_if       = 'DROP TABLE IF EXISTS';

        /**
         * UNSIGNED support
         *
         * @var array
         */
        protected $_unsigned            = array(
                'INT16'         => 'INT',
                'SMALLINT'      => 'INT',
                'INT'           => 'INT64',
                'INT32'         => 'INT64'
        );

        /**
         * DEFAULT value representation in CREATE/ALTER TABLE statements
         *
         * @var string
         */
        protected $_default             = FALSE;

        // --------------------------------------------------------------------

        /**
         * ALTER TABLE
         *
         * @param       string  $alter_type     ALTER type
         * @param       string  $table          Table name
         * @param       mixed   $field          Column definition
         * @return      string|string[]
         */
        protected function _alter_table($alter_type, $table, $field)
        {
                if (in_array($alter_type, array('ADD', 'DROP'), TRUE))
                {
                        return parent::_alter_table($alter_type, $table, $field);
                }

                // No method of modifying columns is supported
                return FALSE;
        }

        // --------------------------------------------------------------------

        /**
         * Process column
         *
         * @param       array   $field
         * @return      string
         */
        protected function _process_column($field)
        {
                return $this->db->escape_identifiers($field['name'])
                        .' '.$field['type'].$field['length']
                        .$field['null']
                        .$field['unique']
                        .$field['auto_increment'];
        }

        // --------------------------------------------------------------------

        /**
         * Field attribute TYPE
         *
         * Performs a data type mapping between different databases.
         *
         * @param       array   &$attributes
         * @return      void
         */
        protected function _attr_type(&$attributes)
        {
                switch (strtoupper($attributes['TYPE']))
                {
                        case 'TINYINT':
                                $attributes['TYPE'] = 'SMALLINT';
                                $attributes['UNSIGNED'] = FALSE;
                                return;
                        case 'MEDIUMINT':
                                $attributes['TYPE'] = 'INTEGER';
                                $attributes['UNSIGNED'] = FALSE;
                                return;
                        case 'INTEGER':
                                $attributes['TYPE'] = 'INT';
                                return;
                        case 'BIGINT':
                                $attributes['TYPE'] = 'INT64';
                                return;
                        default: return;
                }
        }

        // --------------------------------------------------------------------

        /**
         * Field attribute UNIQUE
         *
         * @param       array   &$attributes
         * @param       array   &$field
         * @return      void
         */
        protected function _attr_unique(&$attributes, &$field)
        {
                if ( ! empty($attributes['UNIQUE']) && $attributes['UNIQUE'] === TRUE)
                {
                        $field['unique'] = ' UNIQUE';

                        // UNIQUE must be used with NOT NULL
                        $field['null'] = ' NOT NULL';
                }
        }

        // --------------------------------------------------------------------

        /**
         * Field attribute AUTO_INCREMENT
         *
         * @param       array   &$attributes
         * @param       array   &$field
         * @return      void
         */
        protected function _attr_auto_increment(&$attributes, &$field)
        {
                if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE)
                {
                        if (stripos($field['type'], 'int') !== FALSE)
                        {
                                $field['auto_increment'] = ' AUTO_INCREMENT';
                        }
                        elseif (strcasecmp($field['type'], 'UUID') === 0)
                        {
                                $field['auto_increment'] = ' AUTO_GENERATE';
                        }
                }
        }

}