/system/database/drivers/mysqli/mysqli_forge.php
PHP | 258 lines | 123 code | 40 blank | 95 comment | 22 complexity | 91ee4f164227f69c3126376c33833870 MD5 | raw file
Possible License(s): MIT
- <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
- /**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.1.6 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
- // ------------------------------------------------------------------------
- /**
- * MySQLi Forge Class
- *
- * @category Database
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/database/
- */
- class CI_DB_mysqli_forge extends CI_DB_forge {
- /**
- * Create database
- *
- * @access private
- * @param string the database name
- * @return bool
- */
- function _create_database($name)
- {
- return "CREATE DATABASE ".$name;
- }
- // --------------------------------------------------------------------
- /**
- * Drop database
- *
- * @access private
- * @param string the database name
- * @return bool
- */
- function _drop_database($name)
- {
- return "DROP DATABASE ".$name;
- }
- // --------------------------------------------------------------------
- /**
- * Process Fields
- *
- * @access private
- * @param mixed the fields
- * @return string
- */
- function _process_fields($fields)
- {
- $current_field_count = 0;
- $sql = '';
- foreach ($fields as $field=>$attributes)
- {
- // Numeric field names aren't allowed in databases, so if the key is
- // numeric, we know it was assigned by PHP and the developer manually
- // entered the field information, so we'll simply add it to the list
- if (is_numeric($field))
- {
- $sql .= "\n\t$attributes";
- }
- else
- {
- $attributes = array_change_key_case($attributes, CASE_UPPER);
- $sql .= "\n\t".$this->db->_protect_identifiers($field);
- if (array_key_exists('NAME', $attributes))
- {
- $sql .= ' '.$this->db->_protect_identifiers($attributes['NAME']).' ';
- }
- if (array_key_exists('TYPE', $attributes))
- {
- $sql .= ' '.$attributes['TYPE'];
- }
- if (array_key_exists('CONSTRAINT', $attributes))
- {
- $sql .= '('.$attributes['CONSTRAINT'].')';
- }
- if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
- {
- $sql .= ' UNSIGNED';
- }
- if (array_key_exists('DEFAULT', $attributes))
- {
- $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
- }
- if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
- {
- $sql .= ' NULL';
- }
- else
- {
- $sql .= ' NOT NULL';
- }
- if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
- {
- $sql .= ' AUTO_INCREMENT';
- }
- }
- // don't add a comma on the end of the last field
- if (++$current_field_count < count($fields))
- {
- $sql .= ',';
- }
- }
- return $sql;
- }
- // --------------------------------------------------------------------
- /**
- * Create Table
- *
- * @access private
- * @param string the table name
- * @param mixed the fields
- * @param mixed primary key(s)
- * @param mixed key(s)
- * @param boolean should 'IF NOT EXISTS' be added to the SQL
- * @return bool
- */
- function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
- {
- $sql = 'CREATE TABLE ';
- if ($if_not_exists === TRUE)
- {
- $sql .= 'IF NOT EXISTS ';
- }
- $sql .= $this->db->_escape_identifiers($table)." (";
- $sql .= $this->_process_fields($fields);
- if (count($primary_keys) > 0)
- {
- $key_name = $this->db->_protect_identifiers(implode('_', $primary_keys));
- $primary_keys = $this->db->_protect_identifiers($primary_keys);
- $sql .= ",\n\tPRIMARY KEY ".$key_name." (" . implode(', ', $primary_keys) . ")";
- }
- if (is_array($keys) && count($keys) > 0)
- {
- foreach ($keys as $key)
- {
- if (is_array($key))
- {
- $key_name = $this->db->_protect_identifiers(implode('_', $key));
- $key = $this->db->_protect_identifiers($key);
- }
- else
- {
- $key_name = $this->db->_protect_identifiers($key);
- $key = array($key_name);
- }
- $sql .= ",\n\tKEY {$key_name} (" . implode(', ', $key) . ")";
- }
- }
- $sql .= "\n) DEFAULT CHARACTER SET {$this->db->char_set} COLLATE {$this->db->dbcollat};";
- return $sql;
- }
- // --------------------------------------------------------------------
- /**
- * Drop Table
- *
- * @access private
- * @return string
- */
- function _drop_table($table)
- {
- return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table);
- }
- // --------------------------------------------------------------------
- /**
- * Alter table query
- *
- * Generates a platform-specific query so that a table can be altered
- * Called by add_column(), drop_column(), and column_alter(),
- *
- * @access private
- * @param string the ALTER type (ADD, DROP, CHANGE)
- * @param string the column name
- * @param array fields
- * @param string the field after which we should add the new field
- * @return object
- */
- function _alter_table($alter_type, $table, $fields, $after_field = '')
- {
- $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ";
- // DROP has everything it needs now.
- if ($alter_type == 'DROP')
- {
- return $sql.$this->db->_protect_identifiers($fields);
- }
- $sql .= $this->_process_fields($fields);
- if ($after_field != '')
- {
- $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
- }
- return $sql;
- }
- // --------------------------------------------------------------------
- /**
- * Rename a table
- *
- * Generates a platform-specific query so that a table can be renamed
- *
- * @access private
- * @param string the old table name
- * @param string the new table name
- * @return string
- */
- function _rename_table($table_name, $new_table_name)
- {
- $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
- return $sql;
- }
- }
- /* End of file mysqli_forge.php */
- /* Location: ./system/database/drivers/mysqli/mysqli_forge.php */