并非所有术语都可在ElasticSearch查询中使用

Question

I'm not seeing the results I expected when using term searching as described by https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-term-query.html

The ElasticSearch version is 2.3.2: Using this to create the data:

curl -XPUT http://myelastic:9201/myindex/mytype/90273504?pretty=true -d '{ "CLIENT_ID" : "000000001", "USER_TYPE" : "ABC"}'
curl -XPUT http://myelastic:9201/myindex/mytype/90273505?pretty=true -d '{ "CLIENT_ID" : "000000002", "USER_TYPE" : "ABC"}'

This query shows both records:

curl -D - -o - http://myelastic:9201/myindex/mytype/_search?pretty=true -H"Accept: application/json" -d '{ "query" : { "match_all" : { } } }'

{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 2,
    "max_score" : 1.0,
    "hits" : [ {
      "_index" : "myindex",
      "_type" : "mytype",
      "_id" : "90273505",
      "_score" : 1.0,
      "_source" : {
        "CLIENT_ID" : "000000002",
        "USER_TYPE" : "ABC"
      }
    }, {
      "_index" : "myindex",
      "_type" : "mytype",
      "_id" : "90273504",
      "_score" : 1.0,
      "_source" : {
        "CLIENT_ID" : "000000001",
        "USER_TYPE" : "ABC"
      }
    } ]
  }
}

This query shows one record, as expected:

curl -D - -o - http://myelastic:9201/myindex/mytype/_search?pretty=true -H"Accept: application/json" \
    -d '{ "query" : { "bool" : { "should" : [ { "term" : { "CLIENT_ID" : "000000001" } } ] } } }'

But using a different term results in no records:

curl -D - -o - http://myelastic:9201/myindex/mytype/_search?pretty=true -H"Accept: application/json" \
    -d '{ "query" : { "bool" : { "should" : [ { "term" : { "USER_TYPE" : "ABC" } } ] } } }'

Ultimately I want to score records based on matches on multiple terms, starting with a selection on multiple terms like this:

curl -D - -o - http://myelastic:9201/myindex/mytype/_search?pretty=true -H"Accept: application/json" \
    -d '{ "query" : { "bool" : { "should" : [ { "term" : { "CLIENT_ID" : "000000001" } }, { "term" : { "USER_TYPE" : "ABC" } } ] } } }'

But right now I'm trying to understand why

curl -D - -o - http://myelastic:9201/myindex/mytype/_search?pretty=true -H"Accept: application/json" \
    -d '{ "query" : { "bool" : { "should" : [ { "term" : { "USER_TYPE" : "ABC" } } ] } } }'

returns no records.

Answer 1

Standard analyzer

The standard analyzer is the default analyzer that Elasticsearch uses. It is the best general choice for analyzing text that may be in any language. It splits the text on word boundaries, as defined by the Unicode Consortium, and removes most punctuation. Finally, it lowercases all terms.

https://www.elastic.co/guide/en/elasticsearch/guide/current/analysis-intro.html#_built_in_analyzers

Try to search lower case text. I think it works with numbers because they have no case.

curl -D - -o - http://myelastic:9201/myindex/mytype/_search?pretty=true -H"Accept: application/json" \
    -d '{ "query" : { "bool" : { "should" : [ { "term" : { "USER_TYPE" : "abc" } } ] } } }'

This thread could help