What is the difference between a ship operator and a rehash operator?

A rehash operator takes the output of a query subexpression and routes it to the input of a query plan on another node, while a ship operator hashes keys to machines.

A rehash operator divides ranges across the machines, while a ship operator hashes keys to machines.

A ship operator takes the output of a query subexpression and routes it to the input of a query plan on another node, while a rehash operator hashes keys to machines.

A rehash operator performs load balancing across machines, while a hash operator hashes keys to machines.