Example of how to use copy_to in a reg-ex individual word or full string search

example_copy_to.sense

PUT example_copy
{
    "mappings": {
        "example" : {
            "properties": {
                "original" : {
                    "type": "string",
                    "copy_to": "copied"
                },
                "copied" : {
                    "type": "string",
                    "index": "not_analyzed"    
                }
            }
        }
    }
}

POST /example_copy/example
{
    "original" : "hello there friend"
}

# See that the copied field doesn't show up in the _source
POST /example_copy/_search

# Gets 1 result
POST /example_copy/_search 
{
    "query": {
        "regexp" : {
            "original" : {
                "value" : "t.*"
            }
        }
    }
}
# Gets 0 results
POST /example_copy/_search 
{
    "query": {
        "regexp" : {
            "copied" : {
                "value" : "t.*"
            }
        }
    }
}
# Gets 1 result
POST /example_copy/_search 
{
    "query": {
        "regexp" : {
            "copied" : {
                "value" : "h.*"
            }
        }
    }
}