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

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

Updates certain properties of a {transform}.

[[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_transform` 
cluster privileges to use this API. The built-in  `transform_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}. The list of properties that you can
update is a subset of the list that you can define when you create a {transform}.

When the {transform} is updated, a series of validations occur to ensure its
success. You can use the `defer_validation` parameter to skip these checks.

All updated properties 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.
* You must use {kib} or this API to update a {transform}. Do not update a
{transform} directly via `.transform-internal*` indices using the {es} index API.
If {es} {security-features} are enabled, do not give users any privileges on
`.transform-internal*` indices. If you used {transforms} prior 7.5, also do not
give users any privileges on `.data-frame-internal*` indices.

====

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

`<transform_id>`::
(Required, string)
include::{docdir}/rest-api/common-parms.asciidoc[tag=transform-id]

[[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)
include::{docdir}/rest-api/common-parms.asciidoc[tag=dest]
  
`dest`.`index`:::
(Required, string)
include::{docdir}/rest-api/common-parms.asciidoc[tag=dest-index]

`dest`.`pipeline`:::
(Optional, string)
include::{docdir}/rest-api/common-parms.asciidoc[tag=dest-pipeline]

`frequency`::
(Optional, <<time-units, time units>>)
include::{docdir}/rest-api/common-parms.asciidoc[tag=frequency]

`source`::
(Optional, object)
include::{docdir}/rest-api/common-parms.asciidoc[tag=source-transforms]
  
`source`.`index`:::
(Required, string or array)
include::{docdir}/rest-api/common-parms.asciidoc[tag=source-index-transforms]
    
`source`.`query`:::
(Optional, object)
include::{docdir}/rest-api/common-parms.asciidoc[tag=source-query-transforms]
  
`sync`::
(Optional, object)
include::{docdir}/rest-api/common-parms.asciidoc[tag=sync]
  
`sync`.`time`:::
(Required, object)
include::{docdir}/rest-api/common-parms.asciidoc[tag=sync-time]

`sync`.`time`.`delay`::::
(Optional, <<time-units, time units>>)
include::{docdir}/rest-api/common-parms.asciidoc[tag=sync-time-delay]

`sync`.`time`.`field`::::
(Required, string)
include::{docdir}/rest-api/common-parms.asciidoc[tag=sync-time-field]
+
--
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.

--

[[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": "7.5.0",
  "create_time": 1518808660505
}
----
// TESTRESPONSE[s/"version": "7.5.0"/"version": $body.version/]
// TESTRESPONSE[s/"create_time": 1518808660505/"create_time": $body.create_time/]