Count
Introduced 1.0
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:
GET opensearch_dashboards_sample_data_logs/_count
{
"query": {
"term": {
"response": "200"
}
}
}
The following call to the search API produces equivalent results:
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:
GET opensearch_dashboards_sample_data_logs/_count
To check for the number of documents in a data stream, replace the index name with the data stream name.
To see the number of documents in your cluster:
GET _count
Alternatively, you could use the cat indices and cat count APIs to see the number of documents per index or data stream.
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
{
"count" : 14074,
"_shards" : {
"total" : 1,
"successful" : 1,
"skipped" : 0,
"failed" : 0
}
}