228 lines
7.0 KiB
PHP
228 lines
7.0 KiB
PHP
<?php
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2019 - 2022, CodeIgniter Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author EllisLab Dev Team
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* @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
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* @copyright Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
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* @copyright Copyright (c) 2019 - 2022, CodeIgniter Foundation (https://codeigniter.com/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 1.3.0
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* @filesource
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*/
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defined('BASEPATH') or exit('No direct script access allowed');
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/**
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* MySQLi Forge Class
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*
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* @package CodeIgniter
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* @subpackage Drivers
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/userguide3/database/
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*/
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class CI_DB_mysqli_forge extends CI_DB_forge
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{
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/**
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* CREATE DATABASE statement
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*
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* @var string
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*/
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protected $_create_database = 'CREATE DATABASE %s CHARACTER SET %s COLLATE %s';
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/**
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* CREATE TABLE keys flag
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*
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* Whether table keys are created from within the
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* CREATE TABLE statement.
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*
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* @var bool
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*/
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protected $_create_table_keys = true;
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/**
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* UNSIGNED support
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*
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* @var array
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*/
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protected $_unsigned = array(
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'TINYINT',
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'SMALLINT',
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'MEDIUMINT',
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'INT',
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'INTEGER',
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'BIGINT',
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'REAL',
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'DOUBLE',
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'DOUBLE PRECISION',
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'FLOAT',
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'DECIMAL',
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'NUMERIC'
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);
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/**
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* NULL value representation in CREATE/ALTER TABLE statements
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*
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* @var string
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*/
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protected $_null = 'NULL';
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// --------------------------------------------------------------------
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/**
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* CREATE TABLE attributes
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*
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* @param array $attributes Associative array of table attributes
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* @return string
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*/
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protected function _create_table_attr($attributes)
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{
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$sql = '';
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foreach (array_keys($attributes) as $key) {
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if (is_string($key)) {
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$sql .= ' ' . strtoupper($key) . ' = ' . $attributes[$key];
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}
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}
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if (! empty($this->db->char_set) && ! strpos($sql, 'CHARACTER SET') && ! strpos($sql, 'CHARSET')) {
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$sql .= ' DEFAULT CHARACTER SET = ' . $this->db->char_set;
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}
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if (! empty($this->db->dbcollat) && ! strpos($sql, 'COLLATE')) {
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$sql .= ' COLLATE = ' . $this->db->dbcollat;
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}
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return $sql;
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}
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// --------------------------------------------------------------------
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/**
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* ALTER TABLE
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*
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* @param string $alter_type ALTER type
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* @param string $table Table name
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* @param mixed $field Column definition
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* @return string|string[]
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*/
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protected function _alter_table($alter_type, $table, $field)
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{
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if ($alter_type === 'DROP') {
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return parent::_alter_table($alter_type, $table, $field);
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}
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$sql = 'ALTER TABLE ' . $this->db->escape_identifiers($table);
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for ($i = 0, $c = count($field); $i < $c; $i++) {
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if ($field[$i]['_literal'] !== false) {
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$field[$i] = ($alter_type === 'ADD')
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? "\n\tADD " . $field[$i]['_literal']
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: "\n\tMODIFY " . $field[$i]['_literal'];
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} else {
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if ($alter_type === 'ADD') {
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$field[$i]['_literal'] = "\n\tADD ";
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} else {
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$field[$i]['_literal'] = empty($field[$i]['new_name']) ? "\n\tMODIFY " : "\n\tCHANGE ";
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}
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$field[$i] = $field[$i]['_literal'] . $this->_process_column($field[$i]);
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}
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}
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return array($sql . implode(',', $field));
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}
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// --------------------------------------------------------------------
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/**
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* Process column
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*
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* @param array $field
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* @return string
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*/
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protected function _process_column($field)
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{
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$extra_clause = isset($field['after'])
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? ' AFTER ' . $this->db->escape_identifiers($field['after']) : '';
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if (empty($extra_clause) && isset($field['first']) && $field['first'] === true) {
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$extra_clause = ' FIRST';
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}
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return $this->db->escape_identifiers($field['name'])
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. (empty($field['new_name']) ? '' : ' ' . $this->db->escape_identifiers($field['new_name']))
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. ' ' . $field['type'] . $field['length']
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. $field['unsigned']
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. $field['null']
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. $field['default']
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. $field['auto_increment']
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. $field['unique']
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. (empty($field['comment']) ? '' : ' COMMENT ' . $field['comment'])
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. $extra_clause;
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}
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// --------------------------------------------------------------------
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/**
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* Process indexes
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*
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* @param string $table (ignored)
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* @return string
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*/
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protected function _process_indexes($table)
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{
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$sql = '';
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for ($i = 0, $c = count($this->keys); $i < $c; $i++) {
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if (is_array($this->keys[$i])) {
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for ($i2 = 0, $c2 = count($this->keys[$i]); $i2 < $c2; $i2++) {
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if (! isset($this->fields[$this->keys[$i][$i2]])) {
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unset($this->keys[$i][$i2]);
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continue;
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}
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}
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} elseif (! isset($this->fields[$this->keys[$i]])) {
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unset($this->keys[$i]);
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continue;
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}
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is_array($this->keys[$i]) or $this->keys[$i] = array($this->keys[$i]);
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$sql .= ",\n\tKEY " . $this->db->escape_identifiers(implode('_', $this->keys[$i]))
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. ' (' . implode(', ', $this->db->escape_identifiers($this->keys[$i])) . ')';
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}
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$this->keys = array();
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return $sql;
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}
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}
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