How to query all fields individually with ElasticSearch

Question

As I understand it, ElasticSearch searches on the magic _all field by default. The problem with this seems to be that if a field uses a different index analyzer, the analyzed data from this field is not searched.

I've had success with searching on the fields ['domain', '_all'] but I really need to avoid having to manually specify each field which was analyzed differently. I see fields supports wildcards but seemingly not '' on its own. I could do a, b*, c*, d* etc. but this seems a tad inefficient.

Answer 1

the special field "_all" is discontinued and copy_to function can be used instead as per the official documentation. This approach allows one to create a computed field (managed by elastic search) that one can specify to copy data from other fields to mimic _all search.

However there is an alternative approach through the use of multi_match providing wildcard field names as part of the query. This works just like the earlier mechanism searching "_all" field.

{"multi_match":{"query":"java","fields":["*"]}}]}}