103 lines
3.2 KiB
Markdown
103 lines
3.2 KiB
Markdown
---
|
|
layout: default
|
|
title: Count
|
|
nav_order: 21
|
|
---
|
|
|
|
# Count
|
|
Introduced 1.0
|
|
{: .label .label-purple }
|
|
|
|
The count API gives you quick access to the number of documents that match a query.
|
|
You can also use it to check the document count of an index, data stream, or cluster.
|
|
|
|
|
|
## Example
|
|
|
|
To see the number of documents that match a query:
|
|
|
|
```json
|
|
GET opensearch_dashboards_sample_data_logs/_count
|
|
{
|
|
"query": {
|
|
"term": {
|
|
"response": "200"
|
|
}
|
|
}
|
|
}
|
|
```
|
|
|
|
The following call to the search API produces equivalent results:
|
|
|
|
```json
|
|
GET opensearch_dashboards_sample_data_logs/_search
|
|
{
|
|
"query": {
|
|
"term": {
|
|
"response": "200"
|
|
}
|
|
},
|
|
"size": 0,
|
|
"track_total_hits": true
|
|
}
|
|
```
|
|
|
|
To see the number of documents in an index:
|
|
|
|
```json
|
|
GET opensearch_dashboards_sample_data_logs/_count
|
|
```
|
|
|
|
To check for the number of documents in a [data stream]({{site.url}}{{site.baseurl}}/opensearch/data-streams/), replace the index name with the data stream name.
|
|
|
|
To see the number of documents in your cluster:
|
|
|
|
```json
|
|
GET _count
|
|
```
|
|
|
|
Alternatively, you could use the [cat indices]({{site.url}}{{site.baseurl}}/api-reference/cat/cat-indices/) and [cat count]({{site.url}}{{site.baseurl}}/api-reference/cat/cat-count/) APIs to see the number of documents per index or data stream.
|
|
{: .note }
|
|
|
|
|
|
## Path and HTTP methods
|
|
|
|
```
|
|
GET <target>/_count/<id>
|
|
POST <target>/_count/<id>
|
|
```
|
|
|
|
|
|
## URL parameters
|
|
|
|
All count parameters are optional.
|
|
|
|
Parameter | Type | Description
|
|
:--- | :--- | :---
|
|
`allow_no_indices` | Boolean | If false, the request returns an error if any wildcard expression or index alias targets any closed or missing indices. Default is false.
|
|
`analyzer` | String | The analyzer to use in the query string.
|
|
`analyze_wildcard` | Boolean | Specifies whether to analyze wildcard and prefix queries. Default is false.
|
|
`default_operator` | String | Indicates whether the default operator for a string query should be AND or OR. Default is OR.
|
|
`df` | String | The default field in case a field prefix is not provided in the query string.
|
|
`expand_wildcards` | String | Specifies the type of index that wildcard expressions can match. Supports comma-separated values. Valid values are `all` (match any index), `open` (match open, non-hidden indices), `closed` (match closed, non-hidden indices), `hidden` (match hidden indices), and `none` (deny wildcard expressions). Default is `open`.
|
|
`ignore_unavailable` | Boolean | Specifies whether to include missing or closed indices in the response. Default is false.
|
|
`lenient` | Boolean | Specifies whether OpenSearch should accept requests if queries have format errors (for example, querying a text field for an integer). Default is false.
|
|
`min_score` | Float | Include only documents with a minimum `_score` value in the result.
|
|
`routing` | String | Value used to route the operation to a specific shard.
|
|
`preference` | String | Specifies which shard or node OpenSearch should perform the count operation on.
|
|
`terminate_after` | Integer | The maximum number of documents OpenSearch should process before terminating the request.
|
|
|
|
## Response
|
|
|
|
```json
|
|
{
|
|
"count" : 14074,
|
|
"_shards" : {
|
|
"total" : 1,
|
|
"successful" : 1,
|
|
"skipped" : 0,
|
|
"failed" : 0
|
|
}
|
|
}
|
|
```
|