haven't come across this idea before, interesting - will definitely have to give it some more thought. our 'distributed joins', so to speak, run through our dis

haven't come across this idea before, interesting - will definitely have to give it some more thought. our 'distributed joins', so to speak, run through our distributed query execution model (distsql) setting up incremental 'stages' of computation with the results pipelined and plumbed through individual computes. viewing it through this model our implementation more closely resembles the Grace Hash Join[1] algorithm. you might be interested in the PR[2] that landed this changeset, there's a cool visualization in one of the comments[3] showing the query execution plan. [1]: https://en.wikipedia.org/wiki/Hash_join#Grace_hash_join https://en.wikipedia.org/wiki/Hash_join#Grace_hash_join [2]: https://github.com/cockroachdb/cockroach/pull/12221 https://github.com/cockroachdb/cockroach/pull/12221 [3]: https://github.com/cockroachdb/cockroach/pull/12221#issuecomment-267084941 https://github.com/cockroachdb/cockroach/pull/12221#issuecom...