我是 ES 新手，在 ES 中有一个多重匹配查询，并希望根据其可用性考虑字段

Question

{
    "multi_match": {
      "query": "TEST",
      "fields": [
        "description.regexkeyword^1.0",
        "logical_name.regexkeyword^1.0",
        "logical_table_name.regexkeyword^1.0",
        "physical_name.regexkeyword^1.0",
        "presentation_name.regexkeyword^1.0",
        "table_name.regexkeyword^1.0"
      ],
      "type": "best_fields",
      "operator": "AND",
      "slop": 0,
      "prefix_length": 0,
      "max_expansions": 50,
      "lenient": false,
      "zero_terms_query": "NONE",
      "boost": 1
    }
  }

There is a field, ie edited_description , if in case edited_description exists in document then consider edited_description.regexkeyword^1.0 else consider description, ie description.regexkeyword^1.0 .

Answer 1

You can't define an if condition in multi_match query. But what you can do is re-look your problem statement in a different way. I can re-look this as, that if in case edited_description and description both exists then the match in edited_description field should be given a higher preference.

This can achieved by setting slightly higher boost value for edited_description field.

{
  "multi_match": {
    "query": "TEST",
    "fields": [
      "description.regexkeyword^1.0",
      "edited_description.regexkeyword^1.2",
      "logical_name.regexkeyword^1.0",
      "logical_table_name.regexkeyword^1.0",
      "physical_name.regexkeyword^1.0",
      "presentation_name.regexkeyword^1.0",
      "table_name.regexkeyword^1.0"
    ],
    "type": "best_fields",
    "operator": "AND",
    "slop": 0,
    "prefix_length": 0,
    "max_expansions": 50,
    "lenient": false,
    "zero_terms_query": "NONE",
    "boost": 1
  }
}

This will result in documents having a match in edited_description to be ranked higher. You can adjust the boosting value to your needs.