Clever Geek Handbook

Elasticsearch Phrase Prefix Results

I have two ES requests:

{match:{text:{query: "text box", type: "phrase"}}}
{match:{text:{query: "text bo", type: "phrase_prefix"}}}

The problem is that the second query returns fewer documents than the first, although I would expect the second query to return all the records from the first, plus something extra. What am I missing?

thank

+1


source to share


1 answer


This could be due to being max_expansions

set to the default 10

try it

{
  "query": {
    "match_phrase_prefix": {
      "text": {
        "query": "text bo",
        "max_expansions": 100
      }
    }
  }
}


This one will help you understand how the terms expand. do max_expansions

1000 and see the results.

Basically you have a lot of words that start with bo, like bond, boss, and since the "x" comes last in alphabetical order, you don't get what you expect.

Hope this helps!

+2


source






More articles:


All Articles