tag::actions[]
`actions`::
+
--
(Optional, string)
Comma-separated list or wildcard expression
of actions used to limit the request.

Omit this parameter to return all actions.
--
end::actions[]

tag::active-only[]
`active_only`::
(Optional, Boolean)
If `true`,
the response only includes ongoing shard recoveries.
Defaults to `false`.
end::active-only[]

tag::allow-no-indices[]
`allow_no_indices`::
(Optional, Boolean)
If `false`, the request returns an error if any wildcard expression,
<<aliases,index alias>>, or `_all` value targets only missing or closed indices.
This behavior applies even if the request targets other open indices. For
example, a request targeting `foo*,bar*` returns an error if an index starts
with `foo` but no index starts with `bar`.
end::allow-no-indices[]

tag::allow-no-match-transforms1[]
Specifies what to do when the request:
+
--
* Contains wildcard expressions and there are no {transforms} that match.
* Contains the `_all` string or no identifiers and there are no matches.
* Contains wildcard expressions and there are only partial matches.

The default value is `true`, which returns an empty `transforms` array when
there are no matches and the subset of results when there are partial matches.

If this parameter is `false`, the request returns a `404` status code when there
are no matches or only partial matches.
--
end::allow-no-match-transforms1[]

tag::allow-no-match-transforms2[]
Specifies what to do when the request:
+
--
* Contains wildcard expressions and there are no {transforms} that match.
* Contains the `_all` string or no identifiers and there are no matches.
* Contains wildcard expressions and there are only partial matches.

The default value is `true`, which returns a successful acknowledgement message
when there are no matches. When there are only partial matches, the API stops
the appropriate {transforms}. For example, if the request contains
`test-id1*,test-id2*` as the identifiers and there are no {transforms}
that match `test-id2*`, the API nonetheless stops the {transforms}
that match `test-id1*`.

If this parameter is `false`, the request returns a `404` status code when there
are no matches or only partial matches.
--
end::allow-no-match-transforms2[]

tag::analyzer[]
`analyzer`::
(Optional, string) Analyzer to use for the query string.
+
This parameter can only be used when the `q` query string parameter is
specified.
end::analyzer[]

tag::analyze_wildcard[]
`analyze_wildcard`::
(Optional, Boolean) If `true`, wildcard and prefix queries are analyzed.
Defaults to `false`.
+
This parameter can only be used when the `q` query string parameter is
specified.
end::analyze_wildcard[]

tag::bulk-id[]
`_id`::
(Optional, string)
The document ID.
If no ID is specified, a document ID is automatically generated.
end::bulk-id[]

tag::bulk-index[]
`_index`::
(Optional, string)
Name of the index or index alias to perform the action on. This
parameter is required if a `<target>` is not specified in the request path.
end::bulk-index[]

tag::bulk-index-ds[]
`_index`::
(Optional, string)
Name of the data stream, index, or index alias to perform the action on. This
parameter is required if a `<target>` is not specified in the request path.
end::bulk-index-ds[]

tag::bytes[]
`bytes`::
(Optional, <<byte-units,byte size units>>) Unit used to display byte values.
end::bytes[]

tag::cat-h[]
`h`::
(Optional, string) Comma-separated list of column names to display.
end::cat-h[]

tag::checkpointing-changes-last-detected-at[]
The timestamp when changes were last detected in the source indices.
end::checkpointing-changes-last-detected-at[]

tag::checkpointing-last-search-time[]
The timestamp of the last search in the source indices. This field is only
shown if the transform is running.
end::checkpointing-last-search-time[]

tag::cluster-health-status[]
(string)
Health status of the cluster, based on the state of its primary and replica
shards. Statuses are:

  * `green`:
    All shards are assigned.

  * `yellow`:
    All primary shards are assigned, but one or more replica shards are
    unassigned. If a node in the cluster fails, some data could be unavailable
    until that node is repaired.

  * `red`:
    One or more primary shards are unassigned, so some data is unavailable. This
    can occur briefly during cluster startup as primary shards are assigned.
end::cluster-health-status[]

tag::committed[]
If `true`,
the segments is synced to disk. Segments that are synced can survive a hard reboot.
+
If `false`,
the data from uncommitted segments is also stored in
the transaction log so that Elasticsearch is able to replay
changes on the next start.
end::committed[]

tag::completion-fields[]
`completion_fields`::
(Optional, string)
Comma-separated list or wildcard expressions of fields
to include in `fielddata` and `suggest` statistics.
end::completion-fields[]

tag::component-template[]
`<component-template>`::
(Required, string)
Comma-separated list or wildcard expression of component template names
used to limit the request.
end::component-template[]

tag::delete-time-ms[]
The amount of time spent deleting, in milliseconds.
end::delete-time-ms[]

tag::default_operator[]
`default_operator`::
(Optional, string) The default operator for query string query: AND or OR.
Defaults to `OR`.
+
This parameter can only be used when the `q` query string parameter is
specified.
end::default_operator[]

tag::dest[]
The destination for the {transform}.
end::dest[]

tag::dest-index[]
The _destination index_ for the {transform}.

In the case of a `pivot` transform, the mappings of the destination
index are deduced based on the source fields when possible. If alternate
mappings are required, use the <<indices-create-index,Create index API>>
prior to starting the {transform}.

In the case of a `latest` transform, the mappings are never deduced. If dynamic
mappings for the destination index are undesirable, use the
<<indices-create-index,Create index API>> prior to starting the {transform}.
end::dest-index[]

tag::dest-aliases[]
The aliases that the destination index for the {transform} should have.
Aliases are manipulated using the stored credentials of the transform, which means the secondary credentials supplied
at creation time (if both primary and secondary credentials are specified).

The destination index is added to the aliases regardless whether the destination
index was created by the transform or pre-created by the user.
end::dest-aliases[]

tag::dest-aliases-alias[]
The name of the alias.
end::dest-aliases-alias[]

tag::dest-aliases-move-on-creation[]
Whether or not the destination index should be the **only** index in this alias.
If `true`, all the other indices will be removed from this alias before adding the destination index to this alias.
Defaults to `false`.
end::dest-aliases-move-on-creation[]

tag::dest-pipeline[]
The unique identifier for an <<ingest,ingest pipeline>>.
end::dest-pipeline[]

tag::detailed[]
`detailed`::
(Optional, Boolean)
If `true`,
the response includes detailed information about shard recoveries.
Defaults to `false`.
end::detailed[]

tag::df[]
`df`::
(Optional, string) Field to use as default where no field prefix is given in the
query string.
+
This parameter can only be used when the `q` query string parameter is
specified.
end::df[]

tag::docs-count[]
The number of documents as reported by Lucene. This excludes deleted documents
and counts any <<nested,nested documents>> separately from their parents. It
also excludes documents which were indexed recently and do not yet belong to a
segment.
end::docs-count[]

tag::docs-deleted[]
The number of deleted documents as reported by Lucene, which may be higher or
lower than the number of delete operations you have performed. This number
excludes deletes that were performed recently and do not yet belong to a
segment. Deleted documents are cleaned up by the
<<index-modules-merge,automatic merge process>> if it makes sense to do so.
Also, {es} creates extra deleted documents to internally track the recent
history of operations on a shard.
end::docs-deleted[]

tag::docs-deleted-transform[]
The number of documents that have been deleted from the destination index due to
the retention policy for this {transform}.
end::docs-deleted-transform[]

tag::docs-indexed[]
The number of documents that have been indexed into the destination index
for the {transform}.
end::docs-indexed[]

tag::docs-processed[]
The number of documents that have been processed from the source index of
the {transform}.
end::docs-processed[]

tag::ds-expand-wildcards[]
`expand_wildcards`::
+
--
(Optional, string)
Type of data stream that wildcard patterns can match. Supports
comma-separated values, such as `open,hidden`. Valid values are:

`all`, `hidden`::
Match any data stream, including <<multi-hidden,hidden>> ones.

`open`, `closed`::
Matches any non-hidden data stream. Data streams cannot be closed.

`none`::
Wildcard patterns are not accepted.
--
end::ds-expand-wildcards[]

tag::expand-wildcards[]
`expand_wildcards`::
+
--
(Optional, string)
Type of index that wildcard patterns can match. If the request can target data
streams, this argument determines whether wildcard expressions match hidden data
streams. Supports comma-separated values, such as `open,hidden`. Valid values
are:

`all`::
Match any data stream or index, including <<multi-hidden,hidden>> ones.

`open`::
Match open, non-hidden indices. Also matches any non-hidden data stream.

`closed`::
Match closed, non-hidden indices. Also matches any non-hidden data stream. Data
streams cannot be closed.

`hidden`::
Match hidden data streams and hidden indices. Must be combined with `open`,
`closed`, or both.

`none`::
Wildcard patterns are not accepted.
--
end::expand-wildcards[]

tag::exponential-avg-checkpoint-duration-ms[]
Exponential moving average of the duration of the checkpoint, in milliseconds.
end::exponential-avg-checkpoint-duration-ms[]

tag::exponential-avg-documents-indexed[]
Exponential moving average of the number of new documents that have been
indexed.
end::exponential-avg-documents-indexed[]

tag::exponential-avg-documents-processed[]
Exponential moving average of the number of documents that have been
processed.
end::exponential-avg-documents-processed[]

tag::field_statistics[]
`field_statistics`::
(Optional, Boolean) If `true`, the response includes the document count, sum of document frequencies,
and sum of total term frequencies.
Defaults to `true`.
end::field_statistics[]

tag::fielddata-fields[]
`fielddata_fields`::
(Optional, string)
Comma-separated list or wildcard expressions of fields
to include in `fielddata` statistics.
end::fielddata-fields[]

tag::fields[]
`fields`::
+
--
(Optional, string)
Comma-separated list or wildcard expressions of fields
to include in the statistics.

Used as the default list
unless a specific field list is provided
in the `completion_fields` or `fielddata_fields` parameters.
--
end::fields[]

tag::flat-settings[]
`flat_settings`::
(Optional, Boolean) If `true`, returns settings in flat format. Defaults to
`false`.
end::flat-settings[]

tag::http-format[]
`format`::
(Optional, string) Short version of the
https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html[HTTP accept header].
Valid values include JSON, YAML, etc.
end::http-format[]

tag::frequency[]
The interval between checks for changes in the source indices when the
{transform} is running continuously. The minimum value is `1s` and the maximum
is `1h`. The default value is `1m`.
end::frequency[]

tag::from[]
`from`::
(Optional, integer) Starting document offset. Needs to be non-negative and defaults to `0`.
end::from[]

tag::from-transforms[]
Skips the specified number of {transforms}. The default value is `0`.
end::from-transforms[]

tag::generation[]
Generation number, such as `0`. {es} increments this generation number
for each segment written. {es} then uses this number to derive the segment name.
end::generation[]

tag::group-by[]
`group_by`::
+
--
(Optional, string)
Key used to group tasks in the response.

Possible values are:

`nodes`::
(Default)
Node ID

`parents`::
Parent task ID

`none`::
Do not group tasks.
--
end::group-by[]

tag::groups[]
`groups`::
(Optional, string)
Comma-separated list of search groups
to include in the `search` statistics.
end::groups[]

tag::help[]
`help`::
(Optional, Boolean) If `true`, the response includes help information. Defaults
to `false`.
end::help[]

tag::if_primary_term[]
`if_primary_term`::
(Optional, integer) Only perform the operation if the document has
this primary term. See <<optimistic-concurrency-control-index>>.
end::if_primary_term[]

tag::if_seq_no[]
`if_seq_no`::
(Optional, integer) Only perform the operation if the document has this
sequence number. See <<optimistic-concurrency-control-index>>.
end::if_seq_no[]

tag::ignore_throttled[]
`ignore_throttled`::
(Optional, Boolean) If `true`, concrete, expanded or aliased indices are
ignored when frozen. Defaults to `true`.
+
deprecated:[7.16.0]
end::ignore_throttled[]

tag::index-ignore-unavailable[]
`ignore_unavailable`::
(Optional, Boolean) If `false`, the request returns an error if it targets a
missing or closed index. Defaults to `false`.
end::index-ignore-unavailable[]

tag::include-defaults[]
`include_defaults`::
(Optional, Boolean) If `true`, return all default settings in the response.
Defaults to `false`.
end::include-defaults[]

tag::include-segment-file-sizes[]
`include_segment_file_sizes`::
(Optional, Boolean)
If `true`, the call reports the aggregated disk usage of
each one of the Lucene index files (only applies if segment stats are
requested). Defaults to `false`.
end::include-segment-file-sizes[]

tag::include-unloaded-segments[]
`include_unloaded_segments`::
(Optional, Boolean) If `true`, the response includes information from segments
that are **not** loaded into memory. Defaults to `false`.
end::include-unloaded-segments[]

tag::index-query-parm[]
`index`::
(Optional, string)
Comma-separated list or wildcard expression of index names
used to limit the request.
end::index-query-parm[]

tag::index[]
`<index>`::
(Optional, string) Comma-separated list or wildcard expression of index names
used to limit the request.
end::index[]

tag::index-failures[]
The number of indexing failures.
end::index-failures[]

tag::index-time-ms[]
The amount of time spent indexing, in milliseconds.
end::index-time-ms[]

tag::index-total[]
The number of index operations.
end::index-total[]

tag::index-metric[]
`<index-metric>`::
+
--
(Optional, string)
Comma-separated list of metrics used to limit the request.
Supported metrics are:

`_all`::
Return all statistics.

`completion`::
<<completion-suggester,Completion suggester>> statistics.

`dense_vector`::
Total number of dense vectors indexed.
<<indices-refresh,Index refreshes>> can affect this statistic.

`docs`::
Number of documents, number of deleted docs which have not yet merged out, and total size in bytes.
<<indices-refresh,Index refreshes>> can affect this statistic.

`fielddata`::
<<fielddata-mapping-param,Fielddata>> statistics.

`flush`::
<<indices-flush,Flush>> statistics.

`get`::
Get statistics,
including missing stats.

`indexing`::
<<docs-index_,Indexing>> statistics.

`merge`::
<<index-modules-merge,Merge>> statistics.

`query_cache`::
<<query-cache,Query cache>> statistics.

`refresh`::
<<indices-refresh,Refresh>> statistics.

`request_cache`::
<<shard-request-cache,Shard request cache>> statistics.

`search`::
Search statistics including suggest statistics.
You can include statistics for custom groups
by adding an extra `groups` parameter
(search operations can be associated with one or more groups).
The `groups` parameter accepts a comma separated list of group names.
Use `_all` to return statistics for all groups.

`segments`::
Memory use of all open segments.
+
If the `include_segment_file_sizes` parameter is `true`,
this metric includes the aggregated disk usage
of each Lucene index file.

`sparse_vector`::
Total number of sparse vectors indexed.

<<indices-refresh,Index refreshes>> can affect this statistic.

`store`::
Size of the index in <<byte-units, byte units>>.

`translog`::
<<index-modules-translog,Translog>> statistics.

--
end::index-metric[]

tag::index-template[]
`<index-template>`::
(Required, string)
Comma-separated list of index template names used to limit the request. Wildcard
(`*`) expressions are supported.
end::index-template[]

tag::knn[]
Defines the <<approximate-knn,kNN>> query to run.
end::knn[]

tag::knn-field[]
The name of the vector field to search against. Must be a
<<index-vectors-knn-search, `dense_vector` field with indexing enabled>>.
end::knn-field[]

tag::knn-filter[]
Query to filter the documents that can match. The kNN search will return the top
`k` documents that also match this filter. The value can be a single query or a
list of queries. If `filter` is not provided, all documents are allowed to
match.
end::knn-filter[]

tag::knn-k[]
Number of nearest neighbors to return as top hits. This value must be less than
`num_candidates`. Defaults to `size`.
end::knn-k[]

tag::knn-num-candidates[]
The number of nearest neighbor candidates to consider per shard.
Needs to be greater than `k`, or `size` if `k` is omitted, and cannot exceed 10,000.
{es} collects `num_candidates` results from each shard, then merges them
to find the top `k` results. Increasing `num_candidates` tends to improve the
accuracy of the final `k` results. Defaults to `Math.min(1.5 * k, 10_000)`.
end::knn-num-candidates[]

tag::knn-query-vector[]
Query vector. Must have the same number of dimensions as the vector field you
are searching against. Must be either an array of floats or a hex-encoded byte vector.
end::knn-query-vector[]

tag::knn-query-vector-builder[]
A configuration object indicating how to build a query_vector before executing
the request. You must provide either a `query_vector_builder` or `query_vector`,
but not both. Refer to <<knn-semantic-search>> to learn more.
end::knn-query-vector-builder[]

tag::knn-similarity[]
The minimum similarity required for a document to be considered a match. The similarity
value calculated relates to the raw <<dense-vector-similarity, `similarity`>> used. Not the
document score. The matched documents are then scored according to <<dense-vector-similarity, `similarity`>>
and the provided `boost` is applied.

+
--
The `similarity` parameter is the direct vector similarity calculation.

* `l2_norm`: also known as Euclidean, will include documents where the vector is within
the `dims` dimensional hypersphere with radius `similarity` with origin at `query_vector`.
* `cosine`, `dot_product`, and `max_inner_product`: Only return vectors where the cosine similarity or dot-product are at least the provided
`similarity`.
--
Read more here: <<knn-similarity-search, knn similarity search>>
end::knn-similarity[]

tag::lenient[]
`lenient`::
(Optional, Boolean) If `true`, format-based query failures (such as providing
text to a numeric field) in the query string will be ignored. Defaults to
`false`.
+
This parameter can only be used when the `q` query string parameter is
specified.
end::lenient[]

tag::level[]
`level`::
+
--
(Optional, string)
Indicates whether statistics are aggregated
at the cluster, index, or shard level.

Valid values are:

*   `cluster`
*   `indices`
*   `shards`
--
end::level[]

tag::local[]
`local`::
(Optional, Boolean) If `true`, the request retrieves information from the local
node only. Defaults to `false`, which means information is retrieved from
the master node.
end::local[]

tag::mappings[]
`mappings`::
+
--
(Optional, <<mapping,mapping object>>) Mapping for fields in the index. If
specified, this mapping can include:

* Field names
* <<mapping-types,Field data types>>
* <<mapping-params,Mapping parameters>>

See <<mapping>>.
--
end::mappings[]

tag::max_docs[]
`max_docs`::
(Optional, integer) Maximum number of documents to process. Defaults to all
documents. When set to a value less then or equal to `scroll_size` then a
scroll will not be used to retrieve the results for the operation.
end::max_docs[]

tag::memory[]
Bytes of segment data stored in memory for efficient search,
such as `1264`.
+
A value of `-1` indicates {es} was unable to compute this number.
end::memory[]

tag::bulk-require-alias[]
`require_alias`::
(Optional, Boolean)
If `true`, the action must target an <<aliases,index alias>>. Defaults to
`false`.
end::bulk-require-alias[]

tag::require-alias[]
`require_alias`::
(Optional, Boolean) If `true`, the destination must be an <<aliases,index alias>>.
Defaults to `false`.
end::require-alias[]

tag::bulk-list-executed-pipelines[]
`list_executed_pipelines`::
(Optional, Boolean) If `true`, the response will include the ingest pipelines that
were executed. Defaults to `false`.
end::bulk-list-executed-pipelines[]

tag::bulk-dynamic-templates[]
`dynamic_templates`::
(Optional, map)
A map from the full name of fields to the name of <<dynamic-templates,dynamic templates>>.
Defaults to an empty map. If a name matches a dynamic template, then that template will be
applied regardless of other match predicates defined in the template. And if a field is
already defined in the mapping, then this parameter won't be used.
end::bulk-dynamic-templates[]

tag::node-filter[]
`<node_filter>`::
(Optional, string)
Comma-separated list of <<cluster-nodes,node filters>> used to limit returned
information. Defaults to all nodes in the cluster.
end::node-filter[]

tag::node-id[]
`<node_id>`::
(Optional, string) Comma-separated list of node IDs or names used to limit
returned information.
end::node-id[]

tag::nodes[]
`nodes`::
(Optional, string) Comma-separated list of node IDs or names used to limit
returned information.
end::nodes[]

tag::offsets[]
`<offsets>`::
(Optional, Boolean) If `true`, the response includes term offsets.
Defaults to `true`.
end::offsets[]

tag::parent-task-id[]
`parent_task_id`::
+
--
(Optional, string)
Parent task ID
used to limit returned information.

To return all tasks,
omit this parameter
or use a value of `-1`.
--
end::parent-task-id[]

tag::payloads[]
`payloads`::
(Optional, Boolean) If `true`, the response includes term payloads.
Defaults to `true`.
end::payloads[]

tag::pipeline[]
`pipeline`::
(Optional, string) ID of the pipeline to use to preprocess incoming documents. If the index has a
default ingest pipeline specified, then setting the value to `_none` disables the default ingest
pipeline for this request. If a final pipeline is configured it will always run, regardless of the
value of this parameter.
end::pipeline[]

tag::pages-processed[]
The number of search or bulk index operations processed. Documents are
processed in batches instead of individually.
end::pages-processed[]

tag::pivot[]
The `pivot` method transforms the data by aggregating and grouping it. These
objects define the `group by` fields and the aggregation to reduce the data.
end::pivot[]

tag::pivot-aggs[]
Defines how to aggregate the grouped data. The following aggregations are
currently supported:
+
--
* <<search-aggregations-metrics-avg-aggregation,Average>>
* <<search-aggregations-metrics-boxplot-aggregation,Boxplot>>
* <<search-aggregations-pipeline-bucket-script-aggregation,Bucket script>>
* <<search-aggregations-pipeline-bucket-selector-aggregation,Bucket selector>>
* <<search-aggregations-metrics-cardinality-aggregation,Cardinality>>
* <<search-aggregations-bucket-filter-aggregation,Filter>>
* <<search-aggregations-metrics-geobounds-aggregation,Geo bounds>>
* <<search-aggregations-metrics-geocentroid-aggregation,Geo centroid>>
* <<search-aggregations-metrics-geo-line,Geo line>>
* <<search-aggregations-metrics-cartesian-bounds-aggregation,Cartesian bounds>>
* <<search-aggregations-metrics-cartesian-centroid-aggregation,Cartesian centroid>>
* <<search-aggregations-metrics-max-aggregation,Max>>
* <<search-aggregations-metrics-median-absolute-deviation-aggregation,Median absolute deviation>>
* <<search-aggregations-metrics-min-aggregation,Min>>
* <<search-aggregations-bucket-missing-aggregation,Missing>>
* <<search-aggregations-metrics-percentile-aggregation,Percentiles>>
* <<search-aggregations-bucket-range-aggregation,Range>>
* <<search-aggregations-bucket-rare-terms-aggregation, Rare Terms>>
* <<search-aggregations-metrics-scripted-metric-aggregation,Scripted metric>>
* <<search-aggregations-metrics-stats-aggregation,Stats>>
* <<search-aggregations-metrics-sum-aggregation,Sum>>
* <<search-aggregations-bucket-terms-aggregation, Terms>>
* <<search-aggregations-metrics-top-metrics,Top Metrics>>
* <<search-aggregations-metrics-valuecount-aggregation,Value count>>
* <<search-aggregations-metrics-weight-avg-aggregation,Weighted average>>

--
end::pivot-aggs[]

tag::pivot-group-by[]
Defines how to group the data. More than one grouping can be defined per pivot.
The following groupings are currently supported:
+
--
* <<_date_histogram,Date histogram>>
* <<_geotile_grid,Geotile Grid>>
* <<_histogram,Histogram>>
* <<_terms,Terms>>

The grouping properties can optionally have a `missing_bucket` property. If
it's `true`, documents without a value in the respective `group_by` field are
included. Defaults to `false`.
--
end::pivot-group-by[]

tag::positions[]
`positions`::
(Optional, Boolean) If `true`, the response includes term positions.
Defaults to `true`.
end::positions[]

tag::preference[]
`preference`::
(Optional, string) Specifies the node or shard the operation should be
performed on. Random by default.
end::preference[]

tag::processing-time-ms[]
The amount of time spent processing results, in milliseconds.
end::processing-time-ms[]

tag::processing-total[]
The number of processing operations.
end::processing-total[]

tag::search-q[]
`q`::
(Optional, string) Query in the Lucene query string syntax.
end::search-q[]

tag::query[]
`query`::
(Optional, <<query-dsl,query object>>) Defines the search definition using the
<<query-dsl,Query DSL>>.
end::query[]

tag::realtime[]
`realtime`::
(Optional, Boolean) If `true`, the request is real-time as opposed to near-real-time.
Defaults to `true`. See <<realtime>>.
end::realtime[]

tag::refresh[]
`refresh`::
(Optional, enum) If `true`, {es} refreshes the affected shards to make this
operation visible to search, if `wait_for` then wait for a refresh to make
this operation visible to search, if `false` do nothing with refreshes.
Valid values: `true`, `false`, `wait_for`. Default: `false`.
end::refresh[]

tag::request_cache[]
`request_cache`::
(Optional, Boolean) If `true`, the request cache is used for this request.
Defaults to the index-level setting.
end::request_cache[]

tag::requests_per_second[]
`requests_per_second`::
(Optional, integer) The throttle for this request in sub-requests per second.
Defaults to `-1` (no throttle).
end::requests_per_second[]

tag::routing[]
`routing`::
(Optional, string)
Custom value used to route operations to a specific shard.
end::routing[]

tag::cat-s[]
`s`::
(Optional, string) Comma-separated list of column names or column aliases used
to sort the response.
end::cat-s[]

tag::scroll[]
`scroll`::
(Optional, <<time-units, time units>>) Specifies how long a consistent view of
the index should be maintained for scrolled search.
end::scroll[]

tag::scroll_size[]
`scroll_size`::
(Optional, integer) Size of the scroll request that powers the operation.
Defaults to 1000.
end::scroll_size[]

tag::search-failures[]
The number of search failures.
end::search-failures[]

tag::search-time-ms[]
The amount of time spent searching, in milliseconds.
end::search-time-ms[]

tag::search-total[]
The number of search operations on the source index for the {transform}.
end::search-total[]

tag::search_type[]
`search_type`::
(Optional, string) The type of the search operation. Available options:
* `query_then_fetch`
* `dfs_query_then_fetch`
end::search_type[]

tag::segment[]
Name of the segment, such as `_0`. The segment name is derived from
the segment generation and used internally to create file names in the directory
of the shard.
end::segment[]

tag::segment-search[]
If `true`,
the segment is searchable.
+
If `false`,
the segment has most likely been written to disk
but needs a <<indices-refresh,refresh>> to be searchable.
end::segment-search[]

tag::segment-size[]
Disk space used by the segment, such as `50kb`.
end::segment-size[]

tag::settings[]
`settings`::
(Optional, <<index-modules-settings,index setting object>>) Configuration
options for the index. See <<index-modules-settings>>.
end::settings[]

tag::target-index-settings[]
`settings`::
(Optional, <<index-modules-settings,index setting object>>)
Configuration options for the target index.
See <<index-modules-settings>>.
end::target-index-settings[]

tag::size-transforms[]
Specifies the maximum number of {transforms} to obtain. The default value is
`100`.
end::size-transforms[]

tag::slices[]
`slices`::
(Optional, integer) The number of slices this task should be divided into.
Defaults to 1 meaning the task isn't sliced into subtasks.
end::slices[]

tag::sort[]
`sort`::
(Optional, string) A comma-separated list of <field>:<direction> pairs.
end::sort[]

tag::source[]
`_source`::
(Optional, string) True or false to return the `_source` field or not, or a
list of fields to return.
end::source[]

tag::source_excludes[]
`_source_excludes`::
(Optional, string)
A comma-separated list of <<mapping-source-field,source fields>> to exclude from
the response.
+
You can also use this parameter to exclude fields from the subset specified in
`_source_includes` query parameter.
+
If the `_source` parameter is `false`, this parameter is ignored.
end::source_excludes[]

tag::source_includes[]
`_source_includes`::
(Optional, string)
A comma-separated list of <<mapping-source-field,source fields>> to
include in the response.
+
If this parameter is specified, only these source fields are returned. You can
exclude fields from this subset using the `_source_excludes` query parameter.
+
If the `_source` parameter is `false`, this parameter is ignored.
end::source_includes[]

tag::source-transforms[]
The source of the data for the {transform}.
end::source-transforms[]

tag::source-index-transforms[]
The _source indices_ for the {transform}. It can be a single index, an index
pattern (for example, `"my-index-*"`), an array of indices (for example,
`["my-index-000001", "my-index-000002"]`), or an array of index patterns (for
example, `["my-index-*", "my-other-index-*"]`. For remote indices use the syntax
`"remote_name:index_name"`.
+
--
NOTE: If any indices are in remote clusters then the master node and at least
one transform node must have the `remote_cluster_client` node role.
--
end::source-index-transforms[]

tag::source-query-transforms[]
A query clause that retrieves a subset of data from the source index. See
<<query-dsl>>.
end::source-query-transforms[]

tag::source-runtime-mappings-transforms[]
Definitions of search-time runtime fields that can be used by the transform. For
search runtime fields all data nodes, including remote nodes, must be 7.12 or
later.
end::source-runtime-mappings-transforms[]

tag::state-transform[]
The status of the {transform}, which can be one of the following values:
+
--
* `aborting`: The {transform} is aborting.
* `failed`: The {transform} failed. For more information about the failure,
check the reason field.
* `indexing`: The {transform} is actively processing data and creating new
documents.
* `started`: The {transform} is running but not actively indexing data.
* `stopped`: The {transform} is stopped.
* `stopping`: The {transform} is stopping.
--
end::state-transform[]

tag::state-transform-reason[]
If a {transform} has a `failed` state, this property provides details about the
reason for the failure.
end::state-transform-reason[]

tag::stats[]
`stats`::
(Optional, string) Specific `tag` of the request for logging and statistical
purposes.
end::stats[]

tag::stored_fields[]
`stored_fields`::
(Optional, string)
A comma-separated list of <<mapping-store,`stored fields`>> to include in the response.
end::stored_fields[]

tag::sync[]
Defines the properties {transforms} require to run continuously.
end::sync[]

tag::sync-time[]
Specifies that the {transform} uses a time field to synchronize the source and
destination indices.
end::sync-time[]

tag::sync-time-field[]
The date field that is used to identify new documents in the source.
end::sync-time-field[]

tag::sync-time-delay[]
The time delay between the current time and the latest input data time. The
default value is `60s`.
end::sync-time-delay[]

tag::transform-latest[]
The `latest` method transforms the data by finding the latest document for each
unique key.
end::transform-latest[]

tag::transform-metadata[]
Defines optional {transform} metadata.
end::transform-metadata[]

tag::transform-retention[]
Defines a retention policy for the {transform}. Data that meets the defined
criteria is deleted from the destination index.
end::transform-retention[]

tag::transform-retention-time[]
Specifies that the {transform} uses a time field to set the retention policy.
Data is deleted if `time.field` for the retention policy exists and contains
data older than `max.age`.
end::transform-retention-time[]

tag::transform-retention-time-field[]
The date field that is used to calculate the age of the document. Set
`time.field` to an existing date field.
end::transform-retention-time-field[]

tag::transform-retention-time-max-age[]
Specifies the maximum age of a document in the destination index. Documents that
are older than the configured value are removed from the destination index.
end::transform-retention-time-max-age[]

tag::transform-settings[]
Defines optional {transform} settings.
end::transform-settings[]

tag::transform-settings-dates-as-epoch-milli[]
Defines if dates in the output should be written as ISO formatted string (default)
or as millis since epoch. `epoch_millis` has been the default for transforms created
before version `7.11`. For compatible output set this to `true`.
The default value is `false`.
end::transform-settings-dates-as-epoch-milli[]

tag::transform-settings-docs-per-second[]
Specifies a limit on the number of input documents per second. This setting
throttles the {transform} by adding a wait time between search requests. The
default value is `null`, which disables throttling.
end::transform-settings-docs-per-second[]

tag::transform-settings-align-checkpoints[]
Specifies whether the transform checkpoint ranges should be optimized for performance.
Such optimization can align checkpoint ranges with date histogram interval when date histogram
is specified as a group source in the transform config. As an effect, less document updates in the
destination index will be performed thus improving overall performance.
The default value is `true`, which means the checkpoint ranges will be optimized if possible.
end::transform-settings-align-checkpoints[]

tag::transform-settings-deduce-mappings[]
Specifies whether the transform should deduce the destination index mappings from the transform config.
The default value is `true`, which means the destination index mappings will be deduced if possible.
end::transform-settings-deduce-mappings[]

tag::transform-settings-max-page-search-size[]
Defines the initial page size to use for the composite aggregation for each
checkpoint. If circuit breaker exceptions occur, the page size is dynamically
adjusted to a lower value. The minimum value is `10` and the maximum is `65,536`.
The default value is `500`.
end::transform-settings-max-page-search-size[]

tag::transform-settings-num-failure-retries[]
Defines the number of retries on a recoverable failure before the {transform} task is marked as `failed`.
The minimum value is `0` and the maximum is `100`.
`-1` can be used to denote infinity. In this case, the {transform} never gives up on retrying a recoverable failure.
The default value is the cluster-level setting `num_transform_failure_retries`.
end::transform-settings-num-failure-retries[]

tag::transform-settings-unattended[]
If `true`, the {transform} runs in unattended mode. In unattended mode, the
{transform} retries indefinitely in case of an error which means the {transform}
never fails. Setting the number of retries other than infinite fails in
validation. Defaults to `false`.
end::transform-settings-unattended[]

tag::transform-sort[]
Specifies the date field that is used to identify the latest documents.
end::transform-sort[]

tag::transform-unique-key[]
Specifies an array of one or more fields that are used to group the data.
end::transform-unique-key[]

tag::target-index[]
`<target-index>`::
+
--
(Required, string)
Name of the target index to create.

include::{es-ref-dir}/indices/create-index.asciidoc[tag=index-name-reqs]
--
end::target-index[]

tag::task-id[]
`<task_id>`::
(Optional, string) ID of the task to return
(`node_id:task_number`).
end::task-id[]

tag::term_statistics[]
`term_statistics`::
(Optional, Boolean) If `true`, the response includes term frequency and document frequency.
Defaults to `false`.
end::term_statistics[]

tag::terminate_after[]
`terminate_after`::
(Optional, integer) Maximum number of documents to collect for each shard. If a
query reaches this limit, {es} terminates the query early. {es} collects
documents before sorting.
+
IMPORTANT: Use with caution. {es} applies this parameter to each shard handling
the request. When possible, let {es} perform early termination automatically.
Avoid specifying this parameter for requests that target data streams with
backing indices across multiple data tiers.
end::terminate_after[]

tag::time[]
`time`::
(Optional, <<time-units,time units>>)
Unit used to display time values.
end::time[]

tag::timeoutparms[]
tag::master-timeout[]
`master_timeout`::
(Optional, <<time-units, time units>>)
Period to wait for the master node. If the master node is not available before
the timeout expires, the request fails and returns an error. Defaults to `30s`.
Can also be set to `-1` to indicate that the request should never timeout.
end::master-timeout[]

`timeout`::
(Optional, <<time-units, time units>>) Period to wait for a response from all relevant nodes in the cluster after updating the cluster metadata.
If no response is received before the timeout expires, the cluster metadata update still applies but the response will indicate that it was not completely acknowledged.
Defaults to `30s`.
Can also be set to `-1` to indicate that the request should never timeout.
end::timeoutparms[]

tag::timeout-nodes-request[]
`timeout`::
(Optional, <<time-units, time units>>)
Period to wait for each node to respond. If a node does not respond before its
timeout expires, the response does not include its information. However, timed out
nodes are included in the response's `_nodes.failed` property. Defaults to no
timeout.
end::timeout-nodes-request[]

tag::transform-id[]
Identifier for the {transform}.
end::transform-id[]

tag::transform-id-wildcard[]
Identifier for the {transform}. It can be a {transform} identifier or a wildcard
expression. If you do not specify one of these options, the API returns
information for all {transforms}.
end::transform-id-wildcard[]

tag::trigger-count[]
The number of times the {transform} has been triggered by the scheduler. For
example, the scheduler triggers the {transform} indexer to check for updates
or ingest new data at an interval specified in the
<<put-transform-request-body,`frequency` property>>.
end::trigger-count[]

tag::cat-v[]
`v`::
(Optional, Boolean) If `true`, the response includes column headings.
Defaults to `false`.
end::cat-v[]

tag::version[]
`version`::
(Optional, Boolean) If `true`, returns the document version as part of a hit.
end::version[]

tag::doc-version[]
`version`::
(Optional, integer) Explicit version number for concurrency control.
The specified version must match the current version of the document for the
request to succeed.
end::doc-version[]

tag::segment-version[]
Version of Lucene used to write the segment.
end::segment-version[]

tag::version_type[]
`version_type`::
(Optional, enum) Specific version type: `external`,
`external_gte`.
end::version_type[]

tag::wait_for_active_shards[]
`wait_for_active_shards`::
+
--
(Optional, string) The number of shard copies that must be active before
proceeding with the operation. Set to `all` or any positive integer up
to the total number of shards in the index (`number_of_replicas+1`).
Default: 1, the primary shard.

See <<index-wait-for-active-shards>>.
--
end::wait_for_active_shards[]

tag::rrf-retrievers[]
`retrievers`::
(Required, array of retriever objects)
+
A list of child retrievers to specify which sets of returned top documents
will have the RRF formula applied to them. Each child retriever carries an
equal weight as part of the RRF formula. Two or more child retrievers are
required.
end::rrf-retrievers[]

tag::rrf-rank-constant[]
`rank_constant`::
(Optional, integer)
+
This value determines how much influence documents in individual
result sets per query have over the final ranked result set. A higher value indicates
that lower ranked documents have more influence. This value must be greater than or
equal to `1`. Defaults to `60`.
end::rrf-rank-constant[]

tag::rrf-window-size[]
`window_size`::
(Optional, integer)
+
This value determines the size of the individual result sets per
query. A higher value will improve result relevance at the cost of performance. The final
ranked result set is pruned down to the search request's <<search-size-param, size>>.
`window_size` must be greater than or equal to `size` and greater than or equal to `1`.
Defaults to the `size` parameter.
end::rrf-window-size[]
