# Dynamic mapping of dense\_vector
**URL:** https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559
**Category:** Elasticsearch
**Created:** [April 17, 2024, 5:21am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559 "2024-04-17T05:21:50Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@dhrchatt](https://discuss.elastic.co/u/dhrchatt)
#### Post date: [April 17, 2024, 5:21am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/1 "2024-04-17T05:21:51Z")
I have a float which I want to map to dense\_vector type field. I want to use dynamic mapping but it is dynamically always mapped to float type. Is there a way to map to dense\_vector type when I am using dynamic mapping for creating the index ?
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [April 17, 2024, 5:31am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/2 "2024-04-17T05:31:54Z")
According to [this thread](https://discuss.elastic.co/t/dense-vector-type-changes-to-float-after-loading-the-data/350309) dynamic mapping of vectors was added in Elasticsearch 8.11. Are you by any chance on an earlier version?
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### Author:  [@Kathleen\_DeRusso](https://discuss.elastic.co/u/Kathleen_DeRusso)
#### Post date: [April 17, 2024, 12:01pm UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/3 "2024-04-17T12:01:32Z")
As @Christian_Dahlqvist said, dynamic mapping of [dense vectors](https://www.elastic.co/guide/en/elasticsearch/reference/current/dense-vector.html) was introduced in 8.11.0 with float arrays \> size 128 dynamically mapped to `dense_vector`. If you're using a version \>8.11.0 and seeing an issue with this dynamic mapping, it would be helpful to see an example of what you're sending in that's not being mapped correctly. Thank you!
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### Author:  [@dhrchatt](https://discuss.elastic.co/u/dhrchatt)
#### Post date: [April 18, 2024, 4:36am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/4 "2024-04-18T04:36:51Z")
I am using ES version 8.13.2, inserting dense\_vector (double) data using java client. It creates index with dynamic mapping but type of my\_vector field is "float". I want my\_vector field type to be "dense\_vector" with dynamic mapping.
```auto
import org.apache.http.HttpHost;
import org.elasticsearch.client.RestClient;
import co.elastic.clients.elasticsearch.ElasticsearchClient;
import co.elastic.clients.elasticsearch._types.ElasticsearchException;
import co.elastic.clients.json.jackson.JacksonJsonpMapper;
import co.elastic.clients.transport.ElasticsearchTransport;
import co.elastic.clients.transport.endpoints.BooleanResponse;
import co.elastic.clients.transport.rest_client.RestClientTransport;
import co.elastic.clients.elasticsearch.core.*;
public class ElasticsearchUtil {
private ElasticsearchClient client;
private BulkRequest.Builder builder = new BulkRequest.Builder();
public void connect() {
RestClient restClient = RestClient.builder(new HttpHost("localhost", 9200)).build();
ElasticsearchTransport transport = new RestClientTransport(restClient, new JacksonJsonpMapper());
client = new ElasticsearchClient(transport);
}
public void insert(DenseVec vec) {
try {
client.index(i -> i
.index("my-index")
.id("1")
.document(vec));
System.out.println("Successfully inserted");
} catch (ElasticsearchException | IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
ElasticsearchUtil util = new ElasticsearchUtil();
util.connect();
util.insert(new DenseVec("test data", new double[] {1234567.5678878, 1234567.2378665, 1234567.85987986}));
}
}
class DenseVec {
private double[] my_vector;
private String my_text;
public DenseVec(String my_text, double[] my_vector) {
this.my_vector = my_vector;
this.my_text = my_text;
}
public double[] getMy_vector() {
return my_vector;
}
public void setMy_vector(double[] my_vector) {
this.my_vector = my_vector;
}
public String getMy_text() {
return my_text;
}
public void setMy_text(String my_text) {
this.my_text = my_text;
}
}
```
The mapping of dynamically created index is :-
```auto
curl -X GET "localhost:9200/my-index/_mappings?pretty"
{
"my-index" : {
"mappings" : {
"properties" : {
"my_text" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
},
"my_vector" : {
"type" : "float" -----> (I want this to be dense_vector type)
}
}
}
}
}
```
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [April 18, 2024, 5:03am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/5 "2024-04-18T05:03:36Z")
What is the length of your vector?
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### Author:  [@dhrchatt](https://discuss.elastic.co/u/dhrchatt)
#### Post date: [April 18, 2024, 9:33am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/6 "2024-04-18T09:33:59Z")
In above example it is of length 3....but it may contain variable length vectors.
---
### Author:  [@Christian\_Dahlqvist](https://discuss.elastic.co/u/Christian_Dahlqvist)
#### Post date: [April 18, 2024, 9:42am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/7 "2024-04-18T09:42:19Z")
As Kathleen pointed out, the dynamic mapping only maps arrays with a length greater than 128 as vectors. If you have shorter vectors you need to map them explicitly.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [May 16, 2024, 9:43am UTC](https://discuss.elastic.co/t/dynamic-mapping-of-dense-vector/357559/8 "2024-05-16T09:43:17Z")
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