--
:api: put-transform
:request: PutTransformRequest
:response: AcknowledgedResponse
--
[role="xpack"]
[id="{upid}-{api}"]
=== Put {transform} API

Creates a new {transform}.

The API accepts a +{request}+ object as a request and returns a +{response}+.

[id="{upid}-{api}-request"]
==== Put {transform} request

A +{request}+ requires the following argument:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-request]
--------------------------------------------------
<1> The configuration of the {transform} to create
<2> Whether or not to wait to run deferrable validations until `_start` is called.
This option should be used with care as the created {transform} will run
with the privileges of the user creating it. Meaning, if they do not have privileges,
such an error will not be visible until `_start` is called.

[id="{upid}-{api}-config"]
==== {transform-cap} configuration

The `TransformConfig` object contains all the details about the
{transform} configuration and contains the following arguments:

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-config]
--------------------------------------------------
<1> The {transform} ID
<2> The source indices and query from which to gather data
<3> The destination index and optional pipeline
<4> How often to check for updates to the source indices
<5> The PivotConfig
<6> Optional free text description of the {transform}

[id="{upid}-{api}-query-config"]

==== SourceConfig

The indices and the query from which to collect data.
If query is not set, a `match_all` query is used by default.

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-source-config]
--------------------------------------------------

==== DestConfig

The index where to write the data and the optional pipeline
through which the docs should be indexed

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-dest-config]
--------------------------------------------------

===== QueryConfig

The query with which to select data from the source.

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-query-config]
--------------------------------------------------

==== PivotConfig

Defines the pivot function `group by` fields and the aggregation to reduce the data.

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-pivot-config]
--------------------------------------------------
<1> The `GroupConfig` to use in the pivot
<2> The aggregations to use
<3> The maximum paging size for the {transform} when pulling data
from the source. The size dynamically adjusts as the {transform}
is running to recover from and prevent OOM issues.

===== GroupConfig
The grouping terms. Defines the group by and destination fields
which are produced by the pivot function. There are 3 types of
groups

* Terms
* Histogram
* Date Histogram

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-group-config]
--------------------------------------------------
<1> The destination field
<2> Group by values of the `user_id` field

===== AggregationConfig

Defines the aggregations for the group fields.
// TODO link to the supported aggregations

["source","java",subs="attributes,callouts,macros"]
--------------------------------------------------
include-tagged::{doc-tests-file}[{api}-agg-config]
--------------------------------------------------
<1> Aggregate the average star rating

include::../execution.asciidoc[]

[id="{upid}-{api}-response"]
==== Response

The returned +{response}+ acknowledges the successful creation of
the new {transform} or an error if the configuration is invalid.