firebird_forge.php

<?php

if (!defined('BASEPATH')) {
    exit('No direct script access allowed');
}

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2008 - 2010, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */
// ------------------------------------------------------------------------
/**
 * firebird Forge Class
 *
 * @category	Database
 * @author		ExpressionEngine Dev Team
 * @modified Carlos Garcia Trujilo <http://cgarcia.blogspot.com>
 * @link		http://codeigniter.com/user_guide/database/
 */
class CI_DB_firebird_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) {
            $sql .= 'IF NOT EXISTS ';
        }
        $sql .= $this->db->_escape_identifiers($table) . " (";
        $current_field_count = 0;
        foreach ($fields as $field => $attributes) {
            // Numeric field names aren't allowed in databases, so if the key is
            // numeric, we know it was assigned by PHP and the developer manually
            // entered the field information, so we'll simply add it to the list
            if (is_numeric($field)) {
                $sql .= "\n\t$attributes";
            } else {
                $attributes = array_change_key_case($attributes, CASE_UPPER);
                $sql .= "\n\t" . $this->db->_protect_identifiers($field);
                $sql .= ' ' . $attributes['TYPE'];
                if (array_key_exists('CONSTRAINT', $attributes)) {
                    $sql .= '(' . $attributes['CONSTRAINT'] . ')';
                }
                if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE) {
                    $sql .= ' UNSIGNED';
                }
                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';
                }
                if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE) {
                    $sql .= ' AUTO_INCREMENT';
                }
            }
            // don't add a comma on the end of the last field
            if (++$current_field_count < count($fields)) {
                $sql .= ',';
            }
        }
        if (count($primary_keys) > 0) {
            $primary_keys = $this->db->_protect_identifiers($primary_keys);
            $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
        }
        if (is_array($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),
                    );
                }
                $sql .= ",\n\tUNIQUE (" . implode(', ', $key) . ")";
            }
        }
        $sql .= "\n);";
        return $sql;
    }

    // --------------------------------------------------------------------
    /**
     * Drop Table
     *
     * @access	private
     * @return	bool
     */
    function _drop_table($table) {
        return "DROP TABLE " . $this->db->_escape_identifiers($table);
    }

    // --------------------------------------------------------------------
    /**
     * 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 firebird_forge.php */
/* Location: ./system/database/drivers/firebird/firebird_forge.php */