elastic search "word" data type : mapping is not proper

Question

I am newbie in elastic search and I have been experimenting with it from the past few days. I am not able to do proper mapping as all the data types, I mentioned in the mapping are being mapped to the type "word" instead of the respective types. Here is the mapping I have done

POST my_index
{
 "settings" : {
 "analysis" : {
 "analyzer" : {
    "lowercase_analyzer" : {
      "type" : "custom",
      "tokenizer" : "keyword",
      "filter" : ["lowercase"]
    }
   }
 }
},
"mappings" : {
 "my_type" : {
  "properties" : {
    "name" : {"type" : "string" ,"index" : "not_analyzed"   },
    "field0" : {
      "properties" : {
        "field1" : {"type" : "boolean" },
        "field2" : {"type" : "string" },
        "field3" : {"type" : "date", "format" : "yyyy-MM-dd HH:mm:ss SSSSSS" }
      }
    }
  }
}
}
}

To test the mapping, I am using "_analyze" api as follows

GET my_index/_analyze
{
   "field" : "name",
   "text" : "10.90.99.6"
}

which gives me the following result

{
 "tokens": [
 {
   "token": "10.90.99.6",
  "start_offset": 0,
  "end_offset": 10,
  "type": "word",
  "position": 0
}
] 
}

I am expecting the "type" in the result to be "string". However I could not understand why it is returning of type "word". Also the same is happening with other fields as well when I post the data of type boolean or time stamp in the nested fields using _analyze api.

GET my_index/_analyze
{
 "field" : "field0.field1",
 "text" : "true"
}

Result

 {
   "tokens": [
  {
    "token": "true",
    "start_offset": 0,
    "end_offset": 4,
    "type": "word",
    "position": 0
   }
  ]
 }

Where am I doing wrong in my mapping.

Also, there is no such "word" data type in elastic search reference api.

Val Val · Accepted Answer · 2016-08-17T06:43:41

That's not an error at all, you did it right. The concept of type in the mapping and the concept of type in the _analyze API is different.

The _analyze API will simply return all tokens that are present in the field you're analyzing and each of those tokens is typed "word". That comes from the Lucene TypeAttribute class and as you can see there's only one default value "word"

elastic search "word" data type : mapping is not proper

1 Answers