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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 - 2017, 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 - 2017, 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');
+
+/**
+ * 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
+ }
+
+}