OpenSearch/docs/reference/search/request/fielddata-fields.asciidoc

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[[search-request-fielddata-fields]]
=== Field Data Fields
Allows to return the field data representiation of a field for each hit, for
example:
[source,js]
--------------------------------------------------
{
"query" : {
...
},
"fielddata_fields" : ["test1", "test2"]
}
--------------------------------------------------
Field data fields can work on fields that are not stored.
It's important to understand that using the `fielddata_fields` parameter will
cause the terms for that field to be loaded to memory (cached), which will
result in more memory consumption.