text: -- +migrate Up
  CREATE TABLE downloadQueue(
      sn INTEGER PRIMARY KEY NOT NULL ,
      name TEXT NOT NULL ,
      ep TEXT NOT NULL ,
      sequence INTEGER NOT NULL ,
      downloading INTEGER NOT NULL DEFAULT 0 ,
      stop INTEGER NOT NULL DEFAULT 0,
      spacial INTEGER NOT NULL  DEFAULT 0,
      numberOfChunk INTEGER NOT NULL DEFAULT 1
  );
  -- +migrate Down
  DROP TABLE downloadQueue;