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mysql_forge.php

<?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
 */

// ------------------------------------------------------------------------

/**
 * MySQL Forge Class
 *
 * @category	Database
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/database/
 */
class CI_DB_mysql_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', $attributes))
					{
						switch ($attributes['TYPE'])
						{
							case 'decimal':
							case 'float':
							case 'numeric':
								$sql .= '('.implode(',', $attributes['CONSTRAINT']).')';
							break;

case 'enum':
							case 'set':
								$sql .= '("'.implode('","', $attributes['CONSTRAINT']).'")';
							break;

default:
								$sql .= '('.$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 mysql_forge.php */
/* Location: ./system/database/drivers/mysql/mysql_forge.php */

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index.html	file	114 B	morganrand/morganrand	0644	2017-08-08 08:48:47
mysql_driver.php	file	16.96 KB	morganrand/morganrand	0644	2017-08-08 08:48:49
mysql_forge.php	file	6.29 KB	morganrand/morganrand	0644	2017-08-08 08:48:50
mysql_result.php	file	3.54 KB	morganrand/morganrand	0644	2017-08-08 08:48:51
mysql_utility.php	file	4.5 KB	morganrand/morganrand	0644	2017-08-08 08:48:52