diff options
Diffstat (limited to 'system/database/drivers/postgre/postgre_forge.php')
-rw-r--r-- | system/database/drivers/postgre/postgre_forge.php | 354 |
1 files changed, 130 insertions, 224 deletions
diff --git a/system/database/drivers/postgre/postgre_forge.php b/system/database/drivers/postgre/postgre_forge.php index d9997a433..cdbff4c4b 100644 --- a/system/database/drivers/postgre/postgre_forge.php +++ b/system/database/drivers/postgre/postgre_forge.php @@ -1,299 +1,205 @@ -<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); +<?php /** * CodeIgniter * - * An open source application development framework for PHP 5.1.6 or newer + * An open source application development framework for PHP * - * @package CodeIgniter - * @author ExpressionEngine Dev Team - * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. - * @license http://codeigniter.com/user_guide/license.html - * @link http://codeigniter.com - * @since Version 1.0 + * This content is released under the MIT License (MIT) + * + * Copyright (c) 2014 - 2017, 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 - 2017, British Columbia Institute of Technology (http://bcit.ca/) + * @license http://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 ExpressionEngine Dev Team - * @link http://codeigniter.com/user_guide/database/ + * @author EllisLab Dev Team + * @link https://codeigniter.com/user_guide/database/ */ class CI_DB_postgre_forge extends CI_DB_forge { /** - * Create database + * UNSIGNED support * - * @access private - * @param string the database name - * @return bool + * @var array */ - function _create_database($name) - { - return "CREATE DATABASE ".$name; - } + 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 $_null = 'NULL'; // -------------------------------------------------------------------- /** - * Drop database + * Class constructor * - * @access private - * @param string the database name - * @return bool + * @param object &$db Database object + * @return void */ - function _drop_database($name) + public function __construct(&$db) { - return "DROP DATABASE ".$name; + parent::__construct($db); + + if (version_compare($this->db->version(), '9.0', '>')) + { + $this->create_table_if = 'CREATE TABLE IF NOT EXISTS'; + } } // -------------------------------------------------------------------- /** - * Create Table + * ALTER TABLE * - * @access private - * @param string the table name - * @param array the fields - * @param mixed primary key(s) - * @param mixed key(s) - * @param boolean should 'IF NOT EXISTS' be added to the SQL - * @return bool + * @param string $alter_type ALTER type + * @param string $table Table name + * @param mixed $field Column definition + * @return string|string[] */ - function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists) - { - $sql = 'CREATE TABLE '; - - if ($if_not_exists === TRUE) + protected function _alter_table($alter_type, $table, $field) + { + if (in_array($alter_type, array('DROP', 'ADD'), TRUE)) { - if ($this->db->table_exists($table)) - { - return "SELECT * FROM $table"; // Needs to return innocous but valid SQL statement - } + return parent::_alter_table($alter_type, $table, $field); } - $sql .= $this->db->_escape_identifiers($table)." ("; - $current_field_count = 0; - - foreach ($fields as $field=>$attributes) + $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table); + $sqls = array(); + for ($i = 0, $c = count($field); $i < $c; $i++) { - // Numeric field names aren't allowed in databases, so if the key is - // numeric, we know it was assigned by PHP and the developer manually - // entered the field information, so we'll simply add it to the list - if (is_numeric($field)) + if ($field[$i]['_literal'] !== FALSE) { - $sql .= "\n\t$attributes"; + return FALSE; } - else - { - $attributes = array_change_key_case($attributes, CASE_UPPER); - - $sql .= "\n\t".$this->db->_protect_identifiers($field); - - $is_unsigned = (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE); - // Convert datatypes to be PostgreSQL-compatible - switch (strtoupper($attributes['TYPE'])) - { - case 'TINYINT': - $attributes['TYPE'] = 'SMALLINT'; - break; - case 'SMALLINT': - $attributes['TYPE'] = ($is_unsigned) ? 'INTEGER' : 'SMALLINT'; - break; - case 'MEDIUMINT': - $attributes['TYPE'] = 'INTEGER'; - break; - case 'INT': - $attributes['TYPE'] = ($is_unsigned) ? 'BIGINT' : 'INTEGER'; - break; - case 'BIGINT': - $attributes['TYPE'] = ($is_unsigned) ? 'NUMERIC' : 'BIGINT'; - break; - case 'DOUBLE': - $attributes['TYPE'] = 'DOUBLE PRECISION'; - break; - case 'DATETIME': - $attributes['TYPE'] = 'TIMESTAMP'; - break; - case 'LONGTEXT': - $attributes['TYPE'] = 'TEXT'; - break; - case 'BLOB': - $attributes['TYPE'] = 'BYTEA'; - break; - } - - // If this is an auto-incrementing primary key, use the serial data type instead - if (in_array($field, $primary_keys) && array_key_exists('AUTO_INCREMENT', $attributes) - && $attributes['AUTO_INCREMENT'] === TRUE) - { - $sql .= ' SERIAL'; - } - else - { - $sql .= ' '.$attributes['TYPE']; - } - - // Modified to prevent constraints with integer data types - if (array_key_exists('CONSTRAINT', $attributes) && strpos($attributes['TYPE'], 'INT') === false) - { - $sql .= '('.$attributes['CONSTRAINT'].')'; - } - - 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'; - } - - // Added new attribute to create unqite fields. Also works with MySQL - if (array_key_exists('UNIQUE', $attributes) && $attributes['UNIQUE'] === TRUE) - { - $sql .= ' UNIQUE'; - } + if (version_compare($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']; } - // don't add a comma on the end of the last field - if (++$current_field_count < count($fields)) + if ( ! empty($field[$i]['default'])) { - $sql .= ','; + $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name']) + .' SET DEFAULT '.$field[$i]['default']; } - } - if (count($primary_keys) > 0) - { - // Something seems to break when passing an array to _protect_identifiers() - foreach ($primary_keys as $index => $key) + if (isset($field[$i]['null'])) { - $primary_keys[$index] = $this->db->_protect_identifiers($key); + $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name']) + .($field[$i]['null'] === TRUE ? ' DROP NOT NULL' : ' SET NOT NULL'); } - $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")"; - } - - $sql .= "\n);"; - - if (is_array($keys) && count($keys) > 0) - { - foreach ($keys as $key) + if ( ! empty($field[$i]['new_name'])) { - if (is_array($key)) - { - $key = $this->db->_protect_identifiers($key); - } - else - { - $key = array($this->db->_protect_identifiers($key)); - } + $sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name']) + .' TO '.$this->db->escape_identifiers($field[$i]['new_name']); + } - foreach ($key as $field) - { - $sql .= "CREATE INDEX " . $table . "_" . str_replace(array('"', "'"), '', $field) . "_index ON $table ($field); "; - } + 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 $sql; - } - - // -------------------------------------------------------------------- - - /** - * Drop Table - * - * @access private - * @return bool - */ - function _drop_table($table) - { - return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table)." CASCADE"; - } + return $sqls; + } // -------------------------------------------------------------------- /** - * Alter table query + * Field attribute TYPE * - * Generates a platform-specific query so that a table can be altered - * Called by add_column(), drop_column(), and column_alter(), + * Performs a data type mapping between different databases. * - * @access private - * @param string the ALTER type (ADD, DROP, CHANGE) - * @param string the column name - * @param string the table name - * @param string the column definition - * @param string the default value - * @param boolean should 'NOT NULL' be added - * @param string the field after which we should add the new field - * @return object + * @param array &$attributes + * @return void */ - function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '') + protected function _attr_type(&$attributes) { - $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name); - - // DROP has everything it needs now. - if ($alter_type == 'DROP') + // Reset field lengths for data types that don't support it + if (isset($attributes['CONSTRAINT']) && stripos($attributes['TYPE'], 'int') !== FALSE) { - return $sql; + $attributes['CONSTRAINT'] = NULL; } - $sql .= " $column_definition"; - - if ($default_value != '') - { - $sql .= " DEFAULT \"$default_value\""; - } - - if ($null === NULL) - { - $sql .= ' NULL'; - } - else - { - $sql .= ' NOT NULL'; - } - - if ($after_field != '') + switch (strtoupper($attributes['TYPE'])) { - $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field); + case 'TINYINT': + $attributes['TYPE'] = 'SMALLINT'; + $attributes['UNSIGNED'] = FALSE; + return; + case 'MEDIUMINT': + $attributes['TYPE'] = 'INTEGER'; + $attributes['UNSIGNED'] = FALSE; + return; + default: return; } - - return $sql; - } // -------------------------------------------------------------------- /** - * Rename a table - * - * Generates a platform-specific query so that a table can be renamed + * Field attribute AUTO_INCREMENT * - * @access private - * @param string the old table name - * @param string the new table name - * @return string + * @param array &$attributes + * @param array &$field + * @return void */ - function _rename_table($table_name, $new_table_name) + protected function _attr_auto_increment(&$attributes, &$field) { - $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name); - return $sql; + if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE) + { + $field['type'] = ($field['type'] === 'NUMERIC') + ? 'BIGSERIAL' + : 'SERIAL'; + } } - } - -/* End of file postgre_forge.php */ -/* Location: ./system/database/drivers/postgre/postgre_forge.php */
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