Module util

Structs

KeyValRowMapping 🔒

A triple of actions that map from rows to (key, val) pairs and back again.

Functions

join_permutations

Given the permutations (see permutation_for_arrangement and (dataflow::plan::AvailableCollections) corresponding to two collections with the same key arity, computes the permutation for the result of joining them.

permutation_for_arrangement

Derive supporting logic to support transforming rows to (key, val) pairs, and back again.