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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 - 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';
}
}
}
}