Optimization when num_init_children == 1. In this case we don't need to wait for master returning a response before sending a query to the other nodes.
Optimization when num_init_children == 1. In this case we don't need
to wait for master returning a response before sending a query to the
other nodes.

treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres,treasure-data/prestogres