Gian Merlino ed47a1e1a9
Lookups: Inherit "injective" from registered lookups, improve docs. (#5316)
Code changes:
- In the lookup-based extractionFns, inherit injective property from
  the lookup itself if not specified.

Doc changes:
- Add a "Query execution" section to the lookups doc explaining how
  injective lookups and their optimizations work.
- Remove scary warnings against using registeredLookup extractionFns.
  They are necessary and important since they work with filters and
  function cascades -- two things that the dimension specs do not do.
  They deserve to be first class citizens.
- Move the "registeredLookup" fn above the "lookup" fn. It's probably
  more commonly used, so the docs read better this way.
2018-02-01 18:30:19 -08:00
..
2018-01-04 12:11:24 -08:00
2018-01-05 16:23:13 -06:00