async fn handle_drop_database_task(
    ddl_manager: &DdlManager,
    drop_database_task: DropDatabaseTask,
) -> Result<SubmitDdlTaskResponse>async fn handle_drop_database_task(
    ddl_manager: &DdlManager,
    drop_database_task: DropDatabaseTask,
) -> Result<SubmitDdlTaskResponse>