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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2019, 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 - 2019, British Columbia Institute of Technology (https://bcit.ca/) * @license https://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.3.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * Postgre Forge Class * * @package CodeIgniter * @subpackage Drivers * @category Database * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/database/ */ class CI_DB_postgre_forge extends CI_DB_forge { /** * UNSIGNED support * * @var array */ protected $_unsigned = array( 'INT2' => 'INTEGER', 'SMALLINT' => 'INTEGER', 'INT' => 'BIGINT', 'INT4' => 'BIGINT', 'INTEGER' => 'BIGINT', 'INT8' => 'NUMERIC', 'BIGINT' => 'NUMERIC', 'REAL' => 'DOUBLE PRECISION', 'FLOAT' => 'DOUBLE PRECISION' ); /** * NULL value representation in CREATE/ALTER TABLE statements * * @var string */ protected $_null = 'NULL'; // -------------------------------------------------------------------- /** * Class constructor * * @param object &$db Database object * @return void */ public function __construct(&$db) { parent::__construct($db); if (version_compare($this->db->version(), '9.0', '>')) { $this->create_table_if = 'CREATE TABLE IF NOT EXISTS'; } } // -------------------------------------------------------------------- /** * 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, $field) { if (in_array($alter_type, array('DROP', 'ADD'), TRUE)) { return parent::_alter_table($alter_type, $table, $field); } $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table); $sqls = array(); for ($i = 0, $c = count($field); $i < $c; $i++) { if ($field[$i]['_literal'] !== FALSE) { return FALSE; } if (version_compare($this->db->version(), '8', '>=') && isset($field[$i]['type'])) { $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name']) .' TYPE '.$field[$i]['type'].$field[$i]['length']; } if ( ! empty($field[$i]['default'])) { $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name']) .' SET '.$field[$i]['default']; } if (isset($field[$i]['null'])) { $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name']) .(trim($field[$i]['null']) === $this->_null ? ' DROP NOT NULL' : ' SET NOT NULL'); } if ( ! empty($field[$i]['new_name'])) { $sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name']) .' TO '.$this->db->escape_identifiers($field[$i]['new_name']); } if ( ! empty($field[$i]['comment'])) { $sqls[] = 'COMMENT ON COLUMN ' .$this->db->escape_identifiers($table).'.'.$this->db->escape_identifiers($field[$i]['name']) .' IS '.$field[$i]['comment']; } } return $sqls; } // -------------------------------------------------------------------- /** * Field attribute TYPE * * Performs a data type mapping between different databases. * * @param array &$attributes * @return void */ protected function _attr_type(&$attributes) { // Reset field lengths for data types that don't support it if (isset($attributes['CONSTRAINT']) && stripos($attributes['TYPE'], 'int') !== FALSE) { $attributes['CONSTRAINT'] = NULL; } switch (strtoupper($attributes['TYPE'])) { case 'TINYINT': $attributes['TYPE'] = 'SMALLINT'; $attributes['UNSIGNED'] = FALSE; return; case 'MEDIUMINT': $attributes['TYPE'] = 'INTEGER'; $attributes['UNSIGNED'] = FALSE; return; default: return; } } // -------------------------------------------------------------------- /** * Field attribute AUTO_INCREMENT * * @param array &$attributes * @param array &$field * @return void */ protected function _attr_auto_increment(&$attributes, &$field) { if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE) { $field['type'] = ($field['type'] === 'NUMERIC') ? 'BIGSERIAL' : 'SERIAL'; } } }
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