<index> | String | Name or list of the data streams, indices, or aliases to delete from. Supports wildcards. If left blank, OpenSearch searches all indices.
analyzer | String | The analyzer to use in the query string.
analyze_wildcard | Boolean | Specifies whether to analyze wildcard and prefix queries. Default is false.
conflicts | String | Indicates to OpenSearch what should happen if the delete by query operation runs into a version conflict. Valid options are `abort` and `proceed`. Default is `abort`.
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`.
from | Integer | The starting index to search from. Default is 0.
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.
max_docs | Integer | How many documents the delete by query operation should process at most. Default is all documents.
preference | String | Specifies which shard or node OpenSearch should perform the delete by query operation on.
q | String | Lucene query string's query.
request_cache | Boolean | Specifies whether OpenSearch should use the request cache. Default is whether it’s enabled in the index’s settings.
refresh | Boolean | If true, OpenSearch refreshes shards to make the delete by query operation available to search results. Valid options are `true`, `false`, and `wait_for`, which tells OpenSearch to wait for a refresh before executing the operation. Default is `false`.
search_type | String | Whether OpenSearch should use global term and document frequencies calculating revelance scores. Valid choices are `query_then_fetch` and `dfs_query_then_fetch`. `query_then_fetch` scores documents using local term and document frequencies for the shard. It’s usually faster but less accurate. `dfs_query_then_fetch` scores documents using global term and document frequencies across all shards. It’s usually slower but more accurate. Default is `query_then_fetch`.
slices | String or Integer | How many slices to cut the operation into for faster processing. Available options are `auto`, which tells OpenSearch it should decide how many slices to divide into, or any number of shards. If you have a lot of shards in your index, set a lower number for better efficiency. Default is 1, which means the task should not be divided.
wait_for_active_shards | String | The number of shards that must be active before OpenSearch executes the operation. Valid values are `all` or any integer up to the total number of shards in the index. Default is 1, which is the primary shard.
wait_for_completion | Boolean | Setting this parameter to false indicates to OpenSearch it should not wait for completion and perform this request asynchronously. Asynchronous requests run in the background, and you can use the [Tasks API operation]({{site.url}}{{site.baseurl}}/opensearch/rest-api/tasks) to monitor progress.
To search your index for specific documents, you must include a [query]({{site.url}}{{site.baseurl}}/opensearch/query-dsl/index) in the request body that OpenSearch uses to match documents. If you don't use a query, OpenSearch treats your delete request as a simple [delete document operation]({{site.url}}{{site.baseurl}}/opensearch/rest-api/document-apis/delete-document).
```json
{
"query": {
"match": {
"movie-length": "124"
}
}
}
```
## Response
```json
{
"took": 143,
"timed_out": false,
"total": 1,
"deleted": 1,
"batches": 1,
"version_conflicts": 0,
"noops": 0,
"retries": {
"bulk": 0,
"search": 0
},
"throttled_millis": 0,
"requests_per_second": -1.0,
"throttled_until_millis": 0,
"failures": []
}
```
## Response body fields
Field | Description
:--- | :---
took | The amount of time in milliseconds OpenSearch needed to complete the operation.
timed_out | Whether any delete requests during the operation timed out.
total | Total number of documents processed.
deleted | Total number of documents deleted.
batches | Number of scroll responses the request processed.
version_conflicts | Number of conflicts the request ran into.
noops | How many delete requests OpenSearch ignored during the operation. This field always returns 0.
retries | The number of bulk and search retry requests.
throttled_millis | Number of throttled milliseconds during the request.
requests_per_second | Number of requests executed per second during the operation.
throttled_until_millis | The amount of time until OpenSearch executes the next throttled request. Always equal to 0 in a delete by query request.
failures | Any failures that occur during the request.
