diff options
Diffstat (limited to 'system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php')
| -rw-r--r-- | system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php | 256 |
1 files changed, 256 insertions, 0 deletions
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php new file mode 100644 index 000000000..c7a92b826 --- /dev/null +++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php @@ -0,0 +1,256 @@ +<?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'); + +/** + * PDO MySQL Forge Class + * + * @category Database + * @author EllisLab Dev Team + * @link https://codeigniter.com/user_guide/database/ + */ +class CI_DB_pdo_mysql_forge extends CI_DB_pdo_forge { + + /** + * CREATE DATABASE statement + * + * @var string + */ + protected $_create_database = 'CREATE DATABASE %s CHARACTER SET %s COLLATE %s'; + + /** + * CREATE TABLE IF statement + * + * @var string + */ + protected $_create_table_if = 'CREATE TABLE IF NOT EXISTS'; + + /** + * CREATE TABLE keys flag + * + * Whether table keys are created from within the + * CREATE TABLE statement. + * + * @var bool + */ + protected $_create_table_keys = TRUE; + + /** + * DROP TABLE IF statement + * + * @var string + */ + protected $_drop_table_if = 'DROP TABLE IF EXISTS'; + + /** + * UNSIGNED support + * + * @var array + */ + protected $_unsigned = array( + 'TINYINT', + 'SMALLINT', + 'MEDIUMINT', + 'INT', + 'INTEGER', + 'BIGINT', + 'REAL', + 'DOUBLE', + 'DOUBLE PRECISION', + 'FLOAT', + 'DECIMAL', + 'NUMERIC' + ); + + /** + * NULL value representation in CREATE/ALTER TABLE statements + * + * @var string + */ + protected $_null = 'NULL'; + + // -------------------------------------------------------------------- + + /** + * CREATE TABLE attributes + * + * @param array $attributes Associative array of table attributes + * @return string + */ + protected function _create_table_attr($attributes) + { + $sql = ''; + + foreach (array_keys($attributes) as $key) + { + if (is_string($key)) + { + $sql .= ' '.strtoupper($key).' = '.$attributes[$key]; + } + } + + if ( ! empty($this->db->char_set) && ! strpos($sql, 'CHARACTER SET') && ! strpos($sql, 'CHARSET')) + { + $sql .= ' DEFAULT CHARACTER SET = '.$this->db->char_set; + } + + if ( ! empty($this->db->dbcollat) && ! strpos($sql, 'COLLATE')) + { + $sql .= ' COLLATE = '.$this->db->dbcollat; + } + + return $sql; + } + + // -------------------------------------------------------------------- + + /** + * 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, $field) + { + if ($alter_type === 'DROP') + { + return parent::_alter_table($alter_type, $table, $field); + } + + $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table); + for ($i = 0, $c = count($field); $i < $c; $i++) + { + if ($field[$i]['_literal'] !== FALSE) + { + $field[$i] = ($alter_type === 'ADD') + ? "\n\tADD ".$field[$i]['_literal'] + : "\n\tMODIFY ".$field[$i]['_literal']; + } + else + { + if ($alter_type === 'ADD') + { + $field[$i]['_literal'] = "\n\tADD "; + } + else + { + $field[$i]['_literal'] = empty($field[$i]['new_name']) ? "\n\tMODIFY " : "\n\tCHANGE "; + } + + $field[$i] = $field[$i]['_literal'].$this->_process_column($field[$i]); + } + } + + return array($sql.implode(',', $field)); + } + + // -------------------------------------------------------------------- + + /** + * Process column + * + * @param array $field + * @return string + */ + protected function _process_column($field) + { + $extra_clause = isset($field['after']) + ? ' AFTER '.$this->db->escape_identifiers($field['after']) : ''; + + if (empty($extra_clause) && isset($field['first']) && $field['first'] === TRUE) + { + $extra_clause = ' FIRST'; + } + + return $this->db->escape_identifiers($field['name']) + .(empty($field['new_name']) ? '' : ' '.$this->db->escape_identifiers($field['new_name'])) + .' '.$field['type'].$field['length'] + .$field['unsigned'] + .$field['null'] + .$field['default'] + .$field['auto_increment'] + .$field['unique'] + .(empty($field['comment']) ? '' : ' COMMENT '.$field['comment']) + .$extra_clause; + } + + // -------------------------------------------------------------------- + + /** + * Process indexes + * + * @param string $table (ignored) + * @return string + */ + protected function _process_indexes($table) + { + $sql = ''; + + for ($i = 0, $c = count($this->keys); $i < $c; $i++) + { + if (is_array($this->keys[$i])) + { + for ($i2 = 0, $c2 = count($this->keys[$i]); $i2 < $c2; $i2++) + { + if ( ! isset($this->fields[$this->keys[$i][$i2]])) + { + unset($this->keys[$i][$i2]); + continue; + } + } + } + elseif ( ! isset($this->fields[$this->keys[$i]])) + { + unset($this->keys[$i]); + continue; + } + + is_array($this->keys[$i]) OR $this->keys[$i] = array($this->keys[$i]); + + $sql .= ",\n\tKEY ".$this->db->escape_identifiers(implode('_', $this->keys[$i])) + .' ('.implode(', ', $this->db->escape_identifiers($this->keys[$i])).')'; + } + + $this->keys = array(); + + return $sql; + } + +} |