208 lines
5.2 KiB
PHP
208 lines
5.2 KiB
PHP
<?php
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/**
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* FuzeWorks.
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*
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* The FuzeWorks MVC PHP FrameWork
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*
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* Copyright (C) 2015 TechFuze
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @author TechFuze
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* @copyright Copyright (c) 2013 - 2016, Techfuze. (http://techfuze.net)
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* @copyright Copyright (c) 1996 - 2015, Free Software Foundation, Inc. (http://www.fsf.org/)
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* @license http://opensource.org/licenses/GPL-3.0 GPLv3 License
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*
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* @link http://techfuze.net/fuzeworks
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* @since Version 0.0.1
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*
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* @version Version 1.0.0
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*/
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/**
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* PDO PostgreSQL Forge Class
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*
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* Converted from CodeIgniter.
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*
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* @package FuzeWorks
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* @category Database
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* @author EllisLab Dev Team
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* @link https://codeigniter.com/user_guide/database/
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* @license http://opensource.org/licenses/MIT MIT License
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*/
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class FW_DB_pdo_pgsql_forge extends FW_DB_pdo_forge {
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/**
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* DROP TABLE IF statement
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*
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* @var string
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*/
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protected $_drop_table_if = 'DROP TABLE IF EXISTS';
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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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'INT2' => 'INTEGER',
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'SMALLINT' => 'INTEGER',
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'INT' => 'BIGINT',
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'INT4' => 'BIGINT',
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'INTEGER' => 'BIGINT',
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'INT8' => 'NUMERIC',
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'BIGINT' => 'NUMERIC',
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'REAL' => 'DOUBLE PRECISION',
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'FLOAT' => 'DOUBLE PRECISION'
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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 $_null = 'NULL';
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// --------------------------------------------------------------------
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/**
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* Class constructor
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*
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* @param object &$db Database object
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* @return void
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*/
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public function __construct(&$db)
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{
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parent::__construct($db);
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if (version_compare($this->db->version(), '9.0', '>'))
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{
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$this->create_table_if = 'CREATE TABLE IF NOT EXISTS';
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}
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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, $field)
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{
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if (in_array($alter_type, array('DROP', 'ADD'), TRUE))
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{
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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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$sqls = array();
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for ($i = 0, $c = count($field); $i < $c; $i++)
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{
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if ($field[$i]['_literal'] !== FALSE)
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{
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return FALSE;
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}
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if (version_compare($this->db->version(), '8', '>=') && isset($field[$i]['type']))
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{
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$sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
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.' TYPE '.$field[$i]['type'].$field[$i]['length'];
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}
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if ( ! empty($field[$i]['default']))
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{
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$sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
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.' SET DEFAULT '.$field[$i]['default'];
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}
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if (isset($field[$i]['null']))
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{
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$sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
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.($field[$i]['null'] === TRUE ? ' DROP NOT NULL' : ' SET NOT NULL');
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}
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if ( ! empty($field[$i]['new_name']))
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{
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$sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
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.' TO '.$this->db->escape_identifiers($field[$i]['new_name']);
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}
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if ( ! empty($field[$i]['comment']))
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{
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$sqls[] = 'COMMENT ON COLUMN '
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.$this->db->escape_identifiers($table).'.'.$this->db->escape_identifiers($field[$i]['name'])
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.' IS '.$field[$i]['comment'];
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}
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}
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return $sqls;
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}
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// --------------------------------------------------------------------
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/**
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* Field attribute TYPE
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*
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* Performs a data type mapping between different databases.
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*
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* @param array &$attributes
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* @return void
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*/
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protected function _attr_type(&$attributes)
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{
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// Reset field lenghts for data types that don't support it
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if (isset($attributes['CONSTRAINT']) && stripos($attributes['TYPE'], 'int') !== FALSE)
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{
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$attributes['CONSTRAINT'] = NULL;
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}
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switch (strtoupper($attributes['TYPE']))
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{
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case 'TINYINT':
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$attributes['TYPE'] = 'SMALLINT';
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$attributes['UNSIGNED'] = FALSE;
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return;
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case 'MEDIUMINT':
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$attributes['TYPE'] = 'INTEGER';
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$attributes['UNSIGNED'] = FALSE;
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return;
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default: return;
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}
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}
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// --------------------------------------------------------------------
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/**
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* Field attribute AUTO_INCREMENT
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*
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* @param array &$attributes
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* @param array &$field
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* @return void
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*/
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protected function _attr_auto_increment(&$attributes, &$field)
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{
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if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE)
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{
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$field['type'] = ($field['type'] === 'NUMERIC')
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? 'BIGSERIAL'
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: 'SERIAL';
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}
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}
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}
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