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.