1 <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
5 * An open source application development framework for PHP 5.1.6 or newer
8 * @author ExpressionEngine Dev Team
9 * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
10 * @license http://codeigniter.com/user_guide/license.html
11 * @link http://codeigniter.com
16 // ------------------------------------------------------------------------
22 * @author ExpressionEngine Dev Team
23 * @link http://codeigniter.com/user_guide/database/
25 class CI_DB_mssql_forge extends CI_DB_forge {
31 * @param string the database name
34 function _create_database($name)
36 return "CREATE DATABASE ".$name;
39 // --------------------------------------------------------------------
45 * @param string the database name
48 function _drop_database($name)
50 return "DROP DATABASE ".$name;
53 // --------------------------------------------------------------------
61 function _drop_table($table)
63 return "DROP TABLE ".$this->db->_escape_identifiers($table);
66 // --------------------------------------------------------------------
72 * @param string the table name
73 * @param array the fields
74 * @param mixed primary key(s)
76 * @param boolean should 'IF NOT EXISTS' be added to the SQL
79 function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
81 $sql = 'CREATE TABLE ';
83 if ($if_not_exists === TRUE)
85 $sql .= 'IF NOT EXISTS ';
88 $sql .= $this->db->_escape_identifiers($table)." (";
89 $current_field_count = 0;
91 foreach ($fields as $field=>$attributes)
93 // Numeric field names aren't allowed in databases, so if the key is
94 // numeric, we know it was assigned by PHP and the developer manually
95 // entered the field information, so we'll simply add it to the list
96 if (is_numeric($field))
98 $sql .= "\n\t$attributes";
102 $attributes = array_change_key_case($attributes, CASE_UPPER);
104 $sql .= "\n\t".$this->db->_protect_identifiers($field);
106 $sql .= ' '.$attributes['TYPE'];
108 if (array_key_exists('CONSTRAINT', $attributes))
110 $sql .= '('.$attributes['CONSTRAINT'].')';
113 if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
118 if (array_key_exists('DEFAULT', $attributes))
120 $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
123 if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
132 if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
134 $sql .= ' AUTO_INCREMENT';
138 // don't add a comma on the end of the last field
139 if (++$current_field_count < count($fields))
145 if (count($primary_keys) > 0)
147 $primary_keys = $this->db->_protect_identifiers($primary_keys);
148 $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
151 if (is_array($keys) && count($keys) > 0)
153 foreach ($keys as $key)
157 $key = $this->db->_protect_identifiers($key);
161 $key = array($this->db->_protect_identifiers($key));
164 $sql .= ",\n\tFOREIGN KEY (" . implode(', ', $key) . ")";
173 // --------------------------------------------------------------------
178 * Generates a platform-specific query so that a table can be altered
179 * Called by add_column(), drop_column(), and column_alter(),
182 * @param string the ALTER type (ADD, DROP, CHANGE)
183 * @param string the column name
184 * @param string the table name
185 * @param string the column definition
186 * @param string the default value
187 * @param boolean should 'NOT NULL' be added
188 * @param string the field after which we should add the new field
191 function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
193 $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name);
195 // DROP has everything it needs now.
196 if ($alter_type == 'DROP')
201 $sql .= " $column_definition";
203 if ($default_value != '')
205 $sql .= " DEFAULT \"$default_value\"";
217 if ($after_field != '')
219 $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
226 // --------------------------------------------------------------------
231 * Generates a platform-specific query so that a table can be renamed
234 * @param string the old table name
235 * @param string the new table name
238 function _rename_table($table_name, $new_table_name)
240 // I think this syntax will work, but can find little documentation on renaming tables in MSSQL
241 $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
247 /* End of file mssql_forge.php */
248 /* Location: ./system/database/drivers/mssql/mssql_forge.php */