Lucene/Elasticsearch Indexing
The HAPI JPA Server supports optional indexing via Hibernate Search when configured to use Lucene or Elasticsearch.
This is required to support the _content, or _text search parameters.
Additional indexing is implemented for simple search parameters of type token, string, and reference.
These implement the basic search, as well as several modifiers:
This experimental feature is enabled via the setAdvancedLuceneIndexing() property of DaoConfig.
The Advanced Lucene string search indexing supports the default search, as well as the modifiers defined in https://www.hl7.org/fhir/search.html#string.
:exact matches the entire string, matching case and accents:contains extends the default search to match any substring of the text:text provides a rich search syntax as using the Simple Query Syntax as defined by Lucene and Elasticsearch.The Advance Lucene indexing supports the default token search by code, system, or system+code,
as well as with the :text modifier.
The :text modifier provides the same Simple Query Syntax used by string :text searches.
See https://www.hl7.org/fhir/search.html#token.