use accounting;
alter table cdr 
  add column source_ip varchar(64) not null after source_clir, 
  add column split tinyint(1) unsigned not null default 0 after is_fragmented,
  add column exported_at datetime default null,
  add column export_status enum('unexported', 'ok', 'failed') not null default 'unexported',
  add key estatus(export_status);