/system/database/drivers/postgre/postgre_forge.php
PHP | 299 lines | 218 code | 24 blank | 57 comment | 21 complexity | 1805d9816da3648cf39985d22f0c507c MD5 | raw file
1<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); 2/** 3 * CodeIgniter 4 * 5 * An open source application development framework for PHP 5.1.6 or newer 6 * 7 * @package CodeIgniter 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 12 * @since Version 1.0 13 * @filesource 14 */ 15 16// ------------------------------------------------------------------------ 17 18/** 19 * Postgre Forge Class 20 * 21 * @category Database 22 * @author ExpressionEngine Dev Team 23 * @link http://codeigniter.com/user_guide/database/ 24 */ 25class CI_DB_postgre_forge extends CI_DB_forge { 26 27 /** 28 * Create database 29 * 30 * @access private 31 * @param string the database name 32 * @return bool 33 */ 34 function _create_database($name) 35 { 36 return "CREATE DATABASE ".$name; 37 } 38 39 // -------------------------------------------------------------------- 40 41 /** 42 * Drop database 43 * 44 * @access private 45 * @param string the database name 46 * @return bool 47 */ 48 function _drop_database($name) 49 { 50 return "DROP DATABASE ".$name; 51 } 52 53 // -------------------------------------------------------------------- 54 55 /** 56 * Create Table 57 * 58 * @access private 59 * @param string the table name 60 * @param array the fields 61 * @param mixed primary key(s) 62 * @param mixed key(s) 63 * @param boolean should 'IF NOT EXISTS' be added to the SQL 64 * @return bool 65 */ 66 function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists) 67 { 68 $sql = 'CREATE TABLE '; 69 70 if ($if_not_exists === TRUE) 71 { 72 if ($this->db->table_exists($table)) 73 { 74 return "SELECT * FROM $table"; // Needs to return innocous but valid SQL statement 75 } 76 } 77 78 $sql .= $this->db->_escape_identifiers($table)." ("; 79 $current_field_count = 0; 80 81 foreach ($fields as $field=>$attributes) 82 { 83 // Numeric field names aren't allowed in databases, so if the key is 84 // numeric, we know it was assigned by PHP and the developer manually 85 // entered the field information, so we'll simply add it to the list 86 if (is_numeric($field)) 87 { 88 $sql .= "\n\t$attributes"; 89 } 90 else 91 { 92 $attributes = array_change_key_case($attributes, CASE_UPPER); 93 94 $sql .= "\n\t".$this->db->_protect_identifiers($field); 95 96 $is_unsigned = (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE); 97 98 // Convert datatypes to be PostgreSQL-compatible 99 switch (strtoupper($attributes['TYPE'])) 100 { 101 case 'TINYINT': 102 $attributes['TYPE'] = 'SMALLINT'; 103 break; 104 case 'SMALLINT': 105 $attributes['TYPE'] = ($is_unsigned) ? 'INTEGER' : 'SMALLINT'; 106 break; 107 case 'MEDIUMINT': 108 $attributes['TYPE'] = 'INTEGER'; 109 break; 110 case 'INT': 111 $attributes['TYPE'] = ($is_unsigned) ? 'BIGINT' : 'INTEGER'; 112 break; 113 case 'BIGINT': 114 $attributes['TYPE'] = ($is_unsigned) ? 'NUMERIC' : 'BIGINT'; 115 break; 116 case 'DOUBLE': 117 $attributes['TYPE'] = 'DOUBLE PRECISION'; 118 break; 119 case 'DATETIME': 120 $attributes['TYPE'] = 'TIMESTAMP'; 121 break; 122 case 'LONGTEXT': 123 $attributes['TYPE'] = 'TEXT'; 124 break; 125 case 'BLOB': 126 $attributes['TYPE'] = 'BYTEA'; 127 break; 128 } 129 130 // If this is an auto-incrementing primary key, use the serial data type instead 131 if (in_array($field, $primary_keys) && array_key_exists('AUTO_INCREMENT', $attributes) 132 && $attributes['AUTO_INCREMENT'] === TRUE) 133 { 134 $sql .= ' SERIAL'; 135 } 136 else 137 { 138 $sql .= ' '.$attributes['TYPE']; 139 } 140 141 // Modified to prevent constraints with integer data types 142 if (array_key_exists('CONSTRAINT', $attributes) && strpos($attributes['TYPE'], 'INT') === false) 143 { 144 $sql .= '('.$attributes['CONSTRAINT'].')'; 145 } 146 147 if (array_key_exists('DEFAULT', $attributes)) 148 { 149 $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\''; 150 } 151 152 if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE) 153 { 154 $sql .= ' NULL'; 155 } 156 else 157 { 158 $sql .= ' NOT NULL'; 159 } 160 161 // Added new attribute to create unqite fields. Also works with MySQL 162 if (array_key_exists('UNIQUE', $attributes) && $attributes['UNIQUE'] === TRUE) 163 { 164 $sql .= ' UNIQUE'; 165 } 166 } 167 168 // don't add a comma on the end of the last field 169 if (++$current_field_count < count($fields)) 170 { 171 $sql .= ','; 172 } 173 } 174 175 if (count($primary_keys) > 0) 176 { 177 // Something seems to break when passing an array to _protect_identifiers() 178 foreach ($primary_keys as $index => $key) 179 { 180 $primary_keys[$index] = $this->db->_protect_identifiers($key); 181 } 182 183 $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")"; 184 } 185 186 $sql .= "\n);"; 187 188 if (is_array($keys) && count($keys) > 0) 189 { 190 foreach ($keys as $key) 191 { 192 if (is_array($key)) 193 { 194 $key = $this->db->_protect_identifiers($key); 195 } 196 else 197 { 198 $key = array($this->db->_protect_identifiers($key)); 199 } 200 201 foreach ($key as $field) 202 { 203 $sql .= "CREATE INDEX " . $table . "_" . str_replace(array('"', "'"), '', $field) . "_index ON $table ($field); "; 204 } 205 } 206 } 207 208 return $sql; 209 } 210 211 // -------------------------------------------------------------------- 212 213 /** 214 * Drop Table 215 * 216 * @access private 217 * @return bool 218 */ 219 function _drop_table($table) 220 { 221 return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table)." CASCADE"; 222 } 223 224 // -------------------------------------------------------------------- 225 226 /** 227 * Alter table query 228 * 229 * Generates a platform-specific query so that a table can be altered 230 * Called by add_column(), drop_column(), and column_alter(), 231 * 232 * @access private 233 * @param string the ALTER type (ADD, DROP, CHANGE) 234 * @param string the column name 235 * @param string the table name 236 * @param string the column definition 237 * @param string the default value 238 * @param boolean should 'NOT NULL' be added 239 * @param string the field after which we should add the new field 240 * @return object 241 */ 242 function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '') 243 { 244 $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name); 245 246 // DROP has everything it needs now. 247 if ($alter_type == 'DROP') 248 { 249 return $sql; 250 } 251 252 $sql .= " $column_definition"; 253 254 if ($default_value != '') 255 { 256 $sql .= " DEFAULT \"$default_value\""; 257 } 258 259 if ($null === NULL) 260 { 261 $sql .= ' NULL'; 262 } 263 else 264 { 265 $sql .= ' NOT NULL'; 266 } 267 268 if ($after_field != '') 269 { 270 $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field); 271 } 272 273 return $sql; 274 275 } 276 277 // -------------------------------------------------------------------- 278 279 /** 280 * Rename a table 281 * 282 * Generates a platform-specific query so that a table can be renamed 283 * 284 * @access private 285 * @param string the old table name 286 * @param string the new table name 287 * @return string 288 */ 289 function _rename_table($table_name, $new_table_name) 290 { 291 $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name); 292 return $sql; 293 } 294 295 296} 297 298/* End of file postgre_forge.php */ 299/* Location: ./system/database/drivers/postgre/postgre_forge.php */