如何在弹性搜索中进行精确匹配？

Question

I want to find exact match.if there is no match.I don't want to null .

I am search this id 6a8c283f-1e75-ec11-8943-000d3a15f525 . it is giving me this output

• fcf0dd4e-abbc-ec11-983f-0022482588e9

But these it is not matched only ec11 matched

I tried this search query

 result = await client.search({
          index: 'products',
          "query": {
            "match": {
              "sysid":sysid
            }
          }
        })

Answer 1

The problem is because your sysid field is of type text and is thus analyzed at indexing time and tokenized into fcf0dd4e , abbc , ec11 , 8943 and 000d3a15f525 .

Also when searching using a match query, the searched term is analyzed as well into the following tokens 6a8c283f , 1e75 , ec11 , 8943 , 000d3a15f525 .

As you saw, the match works because ec11 matches.

For an exact match, what you need to do is to run your query against a keyword field instead. Maybe you're lucky and your mapping already contains a sysid.keyword sub-field. If not, you need to change your mapping and reindex your data.

Then you'll be able to run your term query like this and get your exact match:

  "term": {
     "sysid.keyword":sysid
  }