Use the MongoDB Search string type to index string fields. Use the MongoDB Search
phrase, querystring, span,
text, wildcard, regex, and
moreLikeThis operators to query fields indexed as the
string type.
string Type Considerations
The string type doesn't support all MongoDB Search features for string
fields. Index the string field as a token
to:
Run a facet query on string fields.
Sort the MongoDB Search results by string fields.
Find an exact match for queries using equals, in, and range operators.
The MongoDB Search dynamic mappings with
the default typeSet only indexes string fields as string types.
Specify a custom typeSet to dynamically index strings as token or
autocomplete to use their supported features.
Important
MongoDB Search won't index string fields where analyzer tokens exceed 32766 bytes in size. If using the keyword analyzer, string fields which exceed 32766 bytes will not be indexed.