diff options
Diffstat (limited to 'system/database/drivers/pdo/pdo_forge.php')
| -rw-r--r-- | system/database/drivers/pdo/pdo_forge.php | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/system/database/drivers/pdo/pdo_forge.php b/system/database/drivers/pdo/pdo_forge.php new file mode 100644 index 000000000..34a6ee44e --- /dev/null +++ b/system/database/drivers/pdo/pdo_forge.php @@ -0,0 +1,168 @@ +<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +/** + * CodeIgniter + * + * An open source application development framework for PHP 5.2.4 or newer + * + * NOTICE OF LICENSE + * + * Licensed under the Open Software License version 3.0 + * + * This source file is subject to the Open Software License (OSL 3.0) that is + * bundled with this package in the files license.txt / license.rst. It is + * also available through the world wide web at this URL: + * http://opensource.org/licenses/OSL-3.0 + * If you did not receive a copy of the license and are unable to obtain it + * through the world wide web, please send an email to + * licensing@ellislab.com so we can send you a copy immediately. + * + * @package CodeIgniter + * @author EllisLab Dev Team + * @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/) + * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0) + * @link http://codeigniter.com + * @since Version 2.1.0 + * @filesource + */ + +/** + * PDO Forge Class + * + * @category Database + * @author EllisLab Dev Team + * @link http://codeigniter.com/database/ + */ +class CI_DB_pdo_forge extends CI_DB_forge { + + protected $_drop_table = 'DROP TABLE %s'; + + /** + * Create Table + * + * @param string the table name + * @param array the fields + * @param mixed primary key(s) + * @param mixed key(s) + * @param bool should 'IF NOT EXISTS' be added to the SQL + * @return bool + */ + protected function _create_table($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).' ('; + $current_field_count = 0; + + foreach ($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); + $numeric = array('SERIAL', 'INTEGER'); + + $sql .= "\n\t".$this->db->escape_identifiers($field).' '.$attributes['TYPE']; + + if ( ! empty($attributes['CONSTRAINT'])) + { + // Exception for Postgre numeric which not too happy with constraint within those type + if ( ! ($this->db->subdriver === 'pgsql' && in_array($attributes['TYPE'], $numeric))) + { + $sql .= '('.$attributes['CONSTRAINT'].')'; + } + } + + if ( ! empty($attributes['UNSIGNED']) && $attributes['UNSIGNED'] === TRUE) + { + $sql .= ' UNSIGNED'; + } + + if (isset($attributes['DEFAULT'])) + { + $sql .= " DEFAULT '".$attributes['DEFAULT']."'"; + } + + $sql .= ( ! empty($attributes['NULL']) && $attributes['NULL'] === TRUE) + ? ' NULL' : ' NOT NULL'; + + if ( ! empty($attributes['AUTO_INCREMENT']) && $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)) + { + $sql .= ','; + } + } + + if (count($primary_keys) > 0) + { + $sql .= ",\n\tPRIMARY KEY (".implode(', ', $this->db->escape_identifiers($primary_keys)).')'; + } + + if (is_array($keys) && count($keys) > 0) + { + foreach ($keys as $key) + { + $key = is_array($key) + ? $this->db->escape_identifiers($key) + : array($this->db->escape_identifiers($key)); + + $sql .= ",\n\tFOREIGN KEY (".implode(', ', $key).')'; + } + } + + return $sql."\n)"; + } + + // -------------------------------------------------------------------- + + /** + * Alter table query + * + * Generates a platform-specific query so that a table can be altered + * Called by add_column(), drop_column(), and column_alter(), + * + * @param string the ALTER type (ADD, DROP, CHANGE) + * @param string the column name + * @param string the table name + * @param string the column definition + * @param string the default value + * @param bool should 'NOT NULL' be added + * @param string the field after which we should add the new field + * @return string + */ + protected function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '') + { + $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' '.$alter_type.' '.$this->db->escape_identifiers($column_name); + + // DROP has everything it needs now. + if ($alter_type === 'DROP') + { + return $sql; + } + + return $sql .' '.$column_definition + .($default_value !== '' ? " DEFAULT '".$default_value."'" : '') + .($null === NULL ? ' NULL' : ' NOT NULL') + .($after_field !== '' ? ' AFTER '.$this->db->escape_identifiers($after_field) : ''); + } + +} + +/* End of file pdo_forge.php */ +/* Location: ./system/database/drivers/pdo/pdo_forge.php */
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