Returning what druid matched to in a search filter

Hello,

Is there a way to know what druid matched to when passing partial strings in a search filter.

As an example if the following search filter was used and druid matched foo -> foobar, how do we get ‘foobar’. Results will only contain metric values.

Thanks

Gap

{
    "filter": {
        "type": "search",
        "dimension": "product",
        "query": {
          "type": "insensitive_contains",
          "value": "**foo**"
        }
    }
}

http://druid.io/docs/0.9.2-rc1/querying/searchquery.html