How to request a single document by _id via alias?

Question

Is it possible to request a single document by its id by querying an alias, provided that all keys across all indices in the alias are unique (it is an external guarantee)?<

Answer 1

From Elasticsearch 5.1 the query looks like:

GET /my_alias_name/_search/
{
    "query": { 
        "bool": {
         "filter": {
                "term": {
                   "_id": "AUwNrOZsm6BwwrmnodbW"
                }
            }
        }
    }
}