Removed invert

lib/dexter/indexer.rb

@@ -282,9 +282,8 @@ def hypo_indexes_from_plan(index_name_to_columns, plan, index_set)
  query_indexes
  end
 
- def determine_indexes(queries, candidates, tables)
+ def determine_indexes(queries, index_name_to_columns, tables)
  new_indexes = {}
- index_name_to_columns = candidates.invert
 
  # filter out existing indexes
  # this must happen at end of process
@@ -595,7 +594,8 @@ def create_hypothetical_indexes_helper(columns_by_table, n, candidates)
  columns_by_table.each do |table, cols|
  # no reason to use btree index for json columns
  cols.reject { |c| ["json", "jsonb"].include?(c[:type]) }.permutation(n) do |col_set|
- candidates[col_set] = create_hypothetical_index(table, col_set)
+ index_name = create_hypothetical_index(table, col_set)
+ candidates[index_name] = col_set
  end
  end
  end