[data views] ES field type support inventory

[mattkime]

There are a number of ES field types that aren't supported in Kibana or have incomplete support. We would like to provide full support for ALL field types. The first step is taking an inventory to determine what work needs to be done.

• Needs support

  • flattened - Support flattened field type from Elasticsearch #25820
  • nested- Nested field support #1084
  • join

• Available as plugins. Should these be part of ES? Once there's kibana support?

  • murmur3 - * Creates a hash. Not sure this is useful in kibana. Worth discussion. Support as text?
  • annotated_text - * Seems it can be supported as text but shows as unsupported field type

• Won't support

  • percolator - doc/query inversion - store queries, 'queries' contain docs
  • completion - * optimized for auto-completion cases. Unclear if it has a kibana use case but might be able to support as text

• Supported

  • binary
  • boolean
  • keyword
    • keyword
    • constant_keyword
    • wildcard
  • numbers
    • long, double, integer, short, byte, float, half_float, scaled_float, unsigned_long
  • date / date_nanos
  • alias - works, reports as type of target field
  • object
  • range
  • ip
  • version
  • aggregate_metric_double
  • histogram
  • text
    • text
    • match_only_text
  • search_as_you_type
    • *** we may want to hide subfields
  • geo_point
  • geo_shape
  • point
  • shape

[elasticmachine]

Pinging @elastic/kibana-app-services (Team:AppServicesSv)

[elasticmachine]

Pinging @elastic/kibana-data-discovery (Team:DataDiscovery)

[kertal]

Closing in favor of #180463