Elasticsearch: results from multiple queries in one?

Question

have 4 different results in such kind of queries:

GET _search
{
  "query": {
    "query_string": {
      "default_field": "desc",
      "query": "лес"
    }
  }
}

GET _search
{
  "query": {
    "query_string": {
      "default_field": "desc",
      "query": "лес*"
    }
  }
}

GET _search
{
  "query": {
    "query_string": {
      "default_field": "desc",
      "query": "*лес"
    }
  }
}

GET _search
{
  "query": {
    "query_string": {
      "default_field": "desc",
      "query": "*лес*"
    }
  }
}

The difference is the asterisk position. Is it possible to get results from all four queries in one ?

glenacota · Accepted Answer · 2020-02-07 10:05:39Z

2

if you don't need to differentiate what query has determined a successful hit, then you can just use a boolean should query. Something like

{
  "query": {
    "bool": {
      "should": [
      {
        "query_string": {
          "default_field": "desc",
          "query": "лес"
        }
      },
      {
        "query_string": {
          "default_field": "desc",
          "query": "лес*"
        }
      },
      ... 
      ]
    }
  }
}

Update with some recommendations on the queries:

I'm not sure what you need *nec, nec*, and *nec* for. If you are going to combine them, and you don't need to differentiate the hit match, isn't *nec* enough?
I would recommend you switching from match_query to match (first query), prefix and wildcard (on the other queries, if you have non-analysed sub-fields available)

edited Feb 7, 2020 at 10:05

answered Feb 6, 2020 at 15:15

glenacota

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5 Comments

Dmitry Vasechkin Over a year ago

pastebin.com/xw4CPeA1 constructed query. It's always same result (from query without asterisk). Even in reversed query order.

Dmitry Vasechkin Over a year ago

Didn't get the right result from bool. So i made 4 different requests and merged results. That's a heavy payload. But i don't know any other way at this time.

glenacota Over a year ago

Do you get the expected results when you query using wildcards? I'm going to update my answer with some recommendations on the single queries

Dmitry Vasechkin Over a year ago

In my case *nec* and *nec are different in results. I thought that *nec* is a summ pattern for *nec and nec* but really it's not.

Dmitry Vasechkin Over a year ago

Solved. The default "from" : 0, "size" : 10, need to be extended cause i have more than 100 hits in *nec*.

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