[role="xpack"]
[testenv="basic"]
[[update-transform]]
=== Update {transforms} API

[subs="attributes"]
++++
<titleabbrev>Update {transforms}</titleabbrev>
++++

Updates an existing {transform}.

beta[]

[[update-transform-request]]
==== {api-request-title}

`POST _transform/<transform_id>/_update`

[[update-transform-prereqs]]
==== {api-prereq-title}

* If the {es} {security-features} are enabled, you must have
`manage_data_frame_transforms` cluster privileges to use this API. The built-in
`data_frame_transforms_admin` role has these privileges. You must also
have `read` and `view_index_metadata` privileges on the source index and `read`,
`create_index`, and `index` privileges on the destination index. For more
information, see <<security-privileges>> and <<built-in-roles>>.

[[update-transform-desc]]
==== {api-description-title}

This API updates an existing {transform}. All settings except description do not
take effect until after the {transform} starts the next checkpoint. This is
so there is consistency with the pivoted data in each checkpoint.

IMPORTANT: When {es} {security-features} are enabled, your {transform}
remembers which roles the user who updated it had at the time of update and
runs with those privileges.

IMPORTANT:  You must use {kib} or this API to update a {transform}.
            Do not update a {transform} directly via
            `.data-frame-internal*` indices using the Elasticsearch index API.
            If {es} {security-features} are enabled, do not give users any
            privileges on `.data-frame-internal*` indices.

[[update-transform-path-parms]]
==== {api-path-parms-title}

`<transform_id>`::
  (Required, string) Identifier for the {transform}. This identifier
  can contain lowercase alphanumeric characters (a-z and 0-9), hyphens, and
  underscores. It must start and end with alphanumeric characters.

[[update-transform-query-parms]]
==== {api-query-parms-title}

`defer_validation`::
  (Optional, boolean) When `true`, deferrable validations are not run. This
  behavior may be desired if the source index does not exist until after the
  {transform} is updated.

[[update-transform-request-body]]
==== {api-request-body-title}

`description`::
  (Optional, string) Free text description of the {transform}.

`dest`::
  (Optional, object) The destination configuration, which has the
  following properties:
  
  `index`:::
    (Required, string) The _destination index_ for the {transform}.

  `pipeline`:::
    (Optional, string) The unique identifier for a <<pipeline,pipeline>>.

`frequency`::
  (Optional, <<time-units, time units>>) The interval between checks for changes 
  in the source indices when the {transform} is running continuously. 
  Also determines the retry interval in the event of transient failures while 
  the {transform} is searching or indexing. The minimum value is `1s` 
  and the maximum is `1h`. The default value is `1m`.

`source`::
  (Optional, object) The source configuration, which has the following
  properties:
  
  `index`:::
    (Required, string or array) The _source indices_ for the
    {transform}. It can be a single index, an index pattern (for
    example, `"myindex*"`), or an array of indices (for example,
    `["index1", "index2"]`).
    
    `query`:::
      (Optional, object) A query clause that retrieves a subset of data from the
      source index. See <<query-dsl>>.
  
`sync`::
  (Optional, object) Defines the properties required to run continuously.
  `time`:::
    (Required, object) Specifies that the {transform} uses a time
    field to synchronize the source and destination indices.
    `field`::::
      (Required, string) The date field that is used to identify new documents
      in the source.
+
--
TIP: In general, it’s a good idea to use a field that contains the
<<accessing-ingest-metadata,ingest timestamp>>. If you use a different field,
you might need to set the `delay` such that it accounts for data transmission
delays.

--
    `delay`::::
      (Optional, <<time-units, time units>>) The time delay between the current 
      time and the latest input data time. The default value is `60s`.

[[update-transform-example]]
==== {api-examples-title}

[source,console]
--------------------------------------------------
POST _transform/simple-kibana-ecomm-pivot/_update
{
  "source": {
    "index": "kibana_sample_data_ecommerce",
    "query": {
      "term": {
        "geoip.continent_name": {
          "value": "Asia"
        }
      }
    }
  },
  "description": "Maximum priced ecommerce data by customer_id in Asia",
  "dest": {
    "index": "kibana_sample_data_ecommerce_transform_v2",
    "pipeline": "add_timestamp_pipeline"
  },
  "frequency": "15m",
  "sync": {
    "time": {
      "field": "order_date",
      "delay": "120s"
    }
  }
}
--------------------------------------------------
// TEST[setup:simple_kibana_continuous_pivot]

When the {transform} is updated, you receive the updated configuration:

[source,console-result]
----
{
  "id": "simple-kibana-ecomm-pivot",
  "source": {
    "index": ["kibana_sample_data_ecommerce"],
    "query": {
      "term": {
        "geoip.continent_name": {
          "value": "Asia"
        }
      }
    }
  },
  "pivot": {
    "group_by": {
      "customer_id": {
        "terms": {
          "field": "customer_id"
        }
      }
    },
    "aggregations": {
      "max_price": {
        "max": {
          "field": "taxful_total_price"
        }
      }
    }
  },
  "description": "Maximum priced ecommerce data by customer_id in Asia",
  "dest": {
    "index": "kibana_sample_data_ecommerce_transform_v2",
    "pipeline": "add_timestamp_pipeline"
  },
  "frequency": "15m",
  "sync": {
    "time": {
      "field": "order_date",
      "delay": "120s"
    }
  },
  "version": "7.4.0",
  "create_time": 1518808660505
}
----
// TESTRESPONSE[s/"version": "7.4.0"/"version": $body.version/]
// TESTRESPONSE[s/"create_time": 1518808660505/"create_time": $body.create_time/]