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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');
/**
* Interbase/Firebird Forge Class
*
* @category Database
* @author EllisLab Dev Team
* @link https://codeigniter.com/user_guide/database/
*/
class CI_DB_ibase_forge extends CI_DB_forge {
/**
* CREATE TABLE IF statement
*
* @var string
*/
protected $_create_table_if = FALSE;
/**
* RENAME TABLE statement
*
* @var string
*/
protected $_rename_table = FALSE;
/**
* DROP TABLE IF statement
*
* @var string
*/
protected $_drop_table_if = FALSE;
/**
* UNSIGNED support
*
* @var array
*/
protected $_unsigned = array(
'SMALLINT' => 'INTEGER',
'INTEGER' => 'INT64',
'FLOAT' => 'DOUBLE PRECISION'
);
/**
* NULL value representation in CREATE/ALTER TABLE statements
*
* @var string
*/
protected $_null = 'NULL';
// --------------------------------------------------------------------
/**
* Create database
*
* @param string $db_name
* @return bool
*/
public function create_database($db_name)
{
// Firebird databases are flat files, so a path is required
// Hostname is needed for remote access
empty($this->db->hostname) OR $db_name = $this->hostname.':'.$db_name;
return parent::create_database('"'.$db_name.'"');
}
// --------------------------------------------------------------------
/**
* Drop database
*
* @param string $db_name (ignored)
* @return bool
*/
public function drop_database($db_name)
{
if ( ! ibase_drop_db($this->conn_id))
{
return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
}
elseif ( ! empty($this->db->data_cache['db_names']))
{
$key = array_search(strtolower($this->db->database), array_map('strtolower', $this->db->data_cache['db_names']), TRUE);
if ($key !== FALSE)
{
unset($this->db->data_cache['db_names'][$key]);
}
}
return TRUE;
}
// --------------------------------------------------------------------
/**
* 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('DROP', 'ADD'), TRUE))
{
return parent::_alter_table($alter_type, $table, $field);
}
$sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
$sqls = array();
for ($i = 0, $c = count($field); $i < $c; $i++)
{
if ($field[$i]['_literal'] !== FALSE)
{
return FALSE;
}
if (isset($field[$i]['type']))
{
$sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identififers($field[$i]['name'])
.' TYPE '.$field[$i]['type'].$field[$i]['length'];
}
if ( ! empty($field[$i]['default']))
{
$sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
.' SET DEFAULT '.$field[$i]['default'];
}
if (isset($field[$i]['null']))
{
$sqls[] = 'UPDATE "RDB$RELATION_FIELDS" SET "RDB$NULL_FLAG" = '
.($field[$i]['null'] === TRUE ? 'NULL' : '1')
.' WHERE "RDB$FIELD_NAME" = '.$this->db->escape($field[$i]['name'])
.' AND "RDB$RELATION_NAME" = '.$this->db->escape($table);
}
if ( ! empty($field[$i]['new_name']))
{
$sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
.' TO '.$this->db->escape_identifiers($field[$i]['new_name']);
}
}
return $sqls;
}
// --------------------------------------------------------------------
/**
* 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']
.$field['default'];
}
// --------------------------------------------------------------------
/**
* Field attribute TYPE
*
* Performs a data type mapping between different databases.
*
* @param array &$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 'INT':
$attributes['TYPE'] = 'INTEGER';
return;
case 'BIGINT':
$attributes['TYPE'] = 'INT64';
return;
default: return;
}
}
// --------------------------------------------------------------------
/**
* Field attribute AUTO_INCREMENT
*
* @param array &$attributes
* @param array &$field
* @return void
*/
protected function _attr_auto_increment(&$attributes, &$field)
{
// Not supported
}
}