Module mz_expr::linear::util

source ·

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
    Return the map associating columns in the logical, unthinned representation of a collection to columns in the thinned representation of the arrangement corresponding to key.