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Elasticsearch Guide [7.7] » REST APIs » Transform APIs » Get transforms API
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Get transforms APIedit

Retrieves configuration information for transforms.

Requestedit

GET _transform/<transform_id>

GET _transform/<transform_id>,<transform_id>

GET _transform/

GET _transform/_all

GET _transform/*

Prerequisitesedit

If the Elasticsearch security features are enabled, you must have the following privileges:

  • monitor_transform

The built-in transform_user role has this privilege.

For more information, see Security privileges and Built-in roles.

Descriptionedit

You can get information for multiple transforms in a single API request by using a comma-separated list of identifiers or a wildcard expression. You can get information for all transforms by using _all, by specifying * as the <transform_id>, or by omitting the <transform_id>.

Path parametersedit

<transform_id>
(Optional, string) 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.

Query parametersedit

allow_no_match

(Optional, boolean) 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.

from
(Optional, integer) Skips the specified number of transforms. The default value is 0.
size
(Optional, integer) Specifies the maximum number of transforms to obtain. The default value is 100.

Response bodyedit

The API returns an array of transform resources, which are sorted by the id value in ascending order. For the full list of properties, see Create transform API.

create_time
(string) The time the transform was created. For example, 1576094542936. This property is informational; you cannot change its value.
version
(string) The version of Elasticsearch that existed on the node when the transform was created.

Response codesedit

404 (Missing resources)
If allow_no_match is false, this code indicates that there are no resources that match the request or only partial matches for the request.

Examplesedit

The following example retrieves information about a maximum of ten transforms:

GET _transform?size=10

The following example gets configuration information for the ecommerce_transform transform:

GET _transform/ecommerce_transform

The API returns the following results:

{
  "count" : 1,
  "transforms" : [
    {
      "id" : "ecommerce_transform",
      "source" : {
        "index" : [
          "kibana_sample_data_ecommerce"
        ],
        "query" : {
          "term" : {
            "geoip.continent_name" : {
              "value" : "Asia"
            }
          }
        }
      },
      "dest" : {
        "index" : "kibana_sample_data_ecommerce_transform"
      },
      "frequency": "1m",
      "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",
      "version" : "7.5.0",
      "create_time" : 1576094542936
    }
  ]
}
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