<?php
global $mm_importer_version;
$mm_importer_version = '1.0';

function mm_install() {
    global $wpdb;
    global $mm_importer_version;
    global $tableprefix;

    $installed_version = get_option('mm_importer_version');

    $tableprefix = $wpdb->prefix . 'mm_';

    require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );

    $packagetable = $tableprefix . 'calendar';

    $charset_collate = $wpdb->get_charset_collate();
    $sql = "CREATE TABLE ".$packagetable." (
      id mediumint(9) NOT NULL AUTO_INCREMENT,
      event_name text NOT NULL,
      event_date text NOT NULL,
      event_time text NOT NULL,
      event_time2 text NOT NULL,
      time_zone text NOT NULL,
      event_address text NOT NULL,
      PRIMARY KEY  (id)
    ) ".$charset_collate.";";

    dbDelta( $sql );

    update_option( 'mm_importer_version', $mm_importer_version );
}

register_activation_hook( __FILE__, 'mm_install' );
?>