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299 lines
7.2 KiB
299 lines
7.2 KiB
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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/** |
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* CodeIgniter |
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* |
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* An open source application development framework for PHP 5.1.6 or newer |
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* |
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* @package CodeIgniter |
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* @author ExpressionEngine Dev Team |
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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* @license http://codeigniter.com/user_guide/license.html |
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* @link http://codeigniter.com |
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* @since Version 1.0 |
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* @filesource |
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*/ |
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// ------------------------------------------------------------------------ |
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/** |
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* Postgre Forge Class |
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* |
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* @category Database |
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* @author ExpressionEngine Dev Team |
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* @link http://codeigniter.com/user_guide/database/ |
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*/ |
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class CI_DB_postgre_forge extends CI_DB_forge { |
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/** |
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* Create database |
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* |
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* @access private |
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* @param string the database name |
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* @return bool |
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*/ |
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function _create_database($name) |
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{ |
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return "CREATE DATABASE ".$name; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Drop database |
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* |
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* @access private |
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* @param string the database name |
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* @return bool |
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*/ |
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function _drop_database($name) |
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{ |
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return "DROP DATABASE ".$name; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Create Table |
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* |
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* @access private |
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* @param string the table name |
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* @param array the fields |
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* @param mixed primary key(s) |
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* @param mixed key(s) |
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* @param boolean should 'IF NOT EXISTS' be added to the SQL |
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* @return bool |
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*/ |
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function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists) |
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{ |
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$sql = 'CREATE TABLE '; |
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if ($if_not_exists === TRUE) |
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{ |
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if ($this->db->table_exists($table)) |
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{ |
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return "SELECT * FROM $table"; // Needs to return innocous but valid SQL statement |
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} |
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} |
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$sql .= $this->db->_escape_identifiers($table)." ("; |
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$current_field_count = 0; |
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foreach ($fields as $field=>$attributes) |
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{ |
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// Numeric field names aren't allowed in databases, so if the key is |
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// numeric, we know it was assigned by PHP and the developer manually |
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// entered the field information, so we'll simply add it to the list |
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if (is_numeric($field)) |
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{ |
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$sql .= "\n\t$attributes"; |
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} |
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else |
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{ |
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$attributes = array_change_key_case($attributes, CASE_UPPER); |
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$sql .= "\n\t".$this->db->_protect_identifiers($field); |
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$is_unsigned = (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE); |
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// Convert datatypes to be PostgreSQL-compatible |
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switch (strtoupper($attributes['TYPE'])) |
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{ |
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case 'TINYINT': |
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$attributes['TYPE'] = 'SMALLINT'; |
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break; |
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case 'SMALLINT': |
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$attributes['TYPE'] = ($is_unsigned) ? 'INTEGER' : 'SMALLINT'; |
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break; |
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case 'MEDIUMINT': |
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$attributes['TYPE'] = 'INTEGER'; |
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break; |
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case 'INT': |
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$attributes['TYPE'] = ($is_unsigned) ? 'BIGINT' : 'INTEGER'; |
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break; |
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case 'BIGINT': |
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$attributes['TYPE'] = ($is_unsigned) ? 'NUMERIC' : 'BIGINT'; |
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break; |
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case 'DOUBLE': |
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$attributes['TYPE'] = 'DOUBLE PRECISION'; |
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break; |
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case 'DATETIME': |
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$attributes['TYPE'] = 'TIMESTAMP'; |
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break; |
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case 'LONGTEXT': |
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$attributes['TYPE'] = 'TEXT'; |
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break; |
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case 'BLOB': |
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$attributes['TYPE'] = 'BYTEA'; |
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break; |
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} |
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// If this is an auto-incrementing primary key, use the serial data type instead |
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if (in_array($field, $primary_keys) && array_key_exists('AUTO_INCREMENT', $attributes) |
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&& $attributes['AUTO_INCREMENT'] === TRUE) |
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{ |
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$sql .= ' SERIAL'; |
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} |
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else |
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{ |
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$sql .= ' '.$attributes['TYPE']; |
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} |
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// Modified to prevent constraints with integer data types |
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if (array_key_exists('CONSTRAINT', $attributes) && strpos($attributes['TYPE'], 'INT') === false) |
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{ |
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$sql .= '('.$attributes['CONSTRAINT'].')'; |
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} |
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if (array_key_exists('DEFAULT', $attributes)) |
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{ |
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$sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\''; |
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} |
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if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE) |
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{ |
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$sql .= ' NULL'; |
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} |
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else |
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{ |
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$sql .= ' NOT NULL'; |
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} |
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// Added new attribute to create unqite fields. Also works with MySQL |
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if (array_key_exists('UNIQUE', $attributes) && $attributes['UNIQUE'] === TRUE) |
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{ |
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$sql .= ' UNIQUE'; |
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} |
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} |
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// don't add a comma on the end of the last field |
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if (++$current_field_count < count($fields)) |
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{ |
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$sql .= ','; |
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} |
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} |
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if (count($primary_keys) > 0) |
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{ |
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// Something seems to break when passing an array to _protect_identifiers() |
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foreach ($primary_keys as $index => $key) |
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{ |
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$primary_keys[$index] = $this->db->_protect_identifiers($key); |
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} |
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$sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")"; |
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} |
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$sql .= "\n);"; |
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if (is_array($keys) && count($keys) > 0) |
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{ |
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foreach ($keys as $key) |
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{ |
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if (is_array($key)) |
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{ |
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$key = $this->db->_protect_identifiers($key); |
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} |
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else |
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{ |
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$key = array($this->db->_protect_identifiers($key)); |
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} |
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foreach ($key as $field) |
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{ |
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$sql .= "CREATE INDEX " . $table . "_" . str_replace(array('"', "'"), '', $field) . "_index ON $table ($field); "; |
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} |
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} |
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} |
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return $sql; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Drop Table |
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* |
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* @access private |
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* @return bool |
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*/ |
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function _drop_table($table) |
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{ |
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return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table)." CASCADE"; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Alter table query |
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* |
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* Generates a platform-specific query so that a table can be altered |
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* Called by add_column(), drop_column(), and column_alter(), |
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* |
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* @access private |
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* @param string the ALTER type (ADD, DROP, CHANGE) |
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* @param string the column name |
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* @param string the table name |
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* @param string the column definition |
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* @param string the default value |
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* @param boolean should 'NOT NULL' be added |
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* @param string the field after which we should add the new field |
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* @return object |
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*/ |
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function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '') |
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{ |
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$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name); |
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// DROP has everything it needs now. |
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if ($alter_type == 'DROP') |
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{ |
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return $sql; |
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} |
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$sql .= " $column_definition"; |
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if ($default_value != '') |
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{ |
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$sql .= " DEFAULT \"$default_value\""; |
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} |
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if ($null === NULL) |
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{ |
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$sql .= ' NULL'; |
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} |
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else |
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{ |
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$sql .= ' NOT NULL'; |
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} |
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if ($after_field != '') |
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{ |
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$sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field); |
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} |
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return $sql; |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Rename a table |
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* |
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* Generates a platform-specific query so that a table can be renamed |
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* |
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* @access private |
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* @param string the old table name |
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* @param string the new table name |
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* @return string |
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*/ |
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function _rename_table($table_name, $new_table_name) |
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{ |
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$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name); |
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return $sql; |
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} |
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} |
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/* End of file postgre_forge.php */ |
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/* Location: ./system/database/drivers/postgre/postgre_forge.php */
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