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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');/*** CodeIgniter** An open source application development framework for PHP 5.1.6 or newer** @package CodeIgniter* @author ExpressionEngine Dev Team* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.* @license http://codeigniter.com/user_guide/license.html* @link http://codeigniter.com* @since Version 1.0* @filesource*/// ------------------------------------------------------------------------/*** Postgre Forge Class** @category Database* @author ExpressionEngine Dev Team* @link http://codeigniter.com/user_guide/database/*/class CI_DB_postgre_forge extends CI_DB_forge {/*** Create database** @access private* @param string the database name* @return bool*/function _create_database($name){return "CREATE DATABASE ".$name;}// --------------------------------------------------------------------/*** Drop database** @access private* @param string the database name* @return bool*/function _drop_database($name){return "DROP DATABASE ".$name;}// --------------------------------------------------------------------/*** Create 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*/function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists){$sql = 'CREATE TABLE ';if ($if_not_exists === TRUE){if ($this->db->table_exists($table)){return "SELECT * FROM $table"; // Needs to return innocous but valid SQL statement}}$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 listif (is_numeric($field)){$sql .= "\n\t$attributes";}else{$attributes = array_change_key_case($attributes, CASE_UPPER);$sql .= "\n\t".$this->db->_protect_identifiers($field);$is_unsigned = (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE);// Convert datatypes to be PostgreSQL-compatibleswitch (strtoupper($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 insteadif (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 typesif (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 MySQLif (array_key_exists('UNIQUE', $attributes) && $attributes['UNIQUE'] === TRUE){$sql .= ' UNIQUE';}}// don't add a comma on the end of the last fieldif (++$current_field_count < count($fields)){$sql .= ',';}}if (count($primary_keys) > 0){// Something seems to break when passing an array to _protect_identifiers()foreach ($primary_keys as $index => $key){$primary_keys[$index] = $this->db->_protect_identifiers($key);}$sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";}$sql .= "\n);";if (is_array($keys) && count($keys) > 0){foreach ($keys as $key){if (is_array($key)){$key = $this->db->_protect_identifiers($key);}else{$key = array($this->db->_protect_identifiers($key));}foreach ($key as $field){$sql .= "CREATE INDEX " . $table . "_" . str_replace(array('"', "'"), '', $field) . "_index ON $table ($field); ";}}}return $sql;}// --------------------------------------------------------------------/*** Drop Table** @access private* @return bool*/function _drop_table($table){return "DROP TABLE IF EXISTS ".$this->db->_escape_identifiers($table)." CASCADE";}// --------------------------------------------------------------------/*** Alter table query** Generates a platform-specific query so that a table can be altered* Called by add_column(), drop_column(), and column_alter(),** @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*/function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = ''){$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'){return $sql;}$sql .= " $column_definition";if ($default_value != ''){$sql .= " DEFAULT \"$default_value\"";}if ($null === NULL){$sql .= ' NULL';}else{$sql .= ' NOT NULL';}if ($after_field != ''){$sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);}return $sql;}// --------------------------------------------------------------------/*** Rename a table** Generates a platform-specific query so that a table can be renamed** @access private* @param string the old table name* @param string the new table name* @return string*/function _rename_table($table_name, $new_table_name){$sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);return $sql;}}/* End of file postgre_forge.php *//* Location: ./system/database/drivers/postgre/postgre_forge.php */