How fields are associtated with terms in inverted index in elasticsearch?

user_4221607 0
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As per my understanding, elasticsearch uses a structure called inverted index to provide full text search. It is clear that inverted index has terms and ids of the documents which has that term but the document can have any number of fields and the field name can be used in the query time to look/search only on that field. In that case how elasticsearch restricts/limits search only to a particular field? I would like to know if inverted index contains fields name or field id along with terms and document id.

Similar thing happens when you sort based on any field. So there could be a way to associate terms with field names. Please help me understand the intricacies involved here.

Thanks in advance.

elasticsearch inverted-index
3 Answers

I was also having this question I can share my understanding here with you. Elasticsearch creates an inverted index for each full-text field of the document. So if an index has 10 fields that allow full-text search then Elasticsearch will create 10 different inverted index for the 10 fields and store the analyzer results in those inverted indices for each field. Thus when you perform a search operation and specify what all fields you want to search then Elasticsearch will search on the inverted indices of those specific fields only Thus to summarize, an inverted index is created at the field level. I hope that helps Thanks

user_98977160
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