Preview a transform
Generally available; Added in 7.2.0
All methods and paths for this operation:
GET
/_transform/_preview
POST
/_transform/_preview
GET
/_transform/{transform_id}/_preview
POST
/_transform/{transform_id}/_preview
Generates a preview of the results that you will get when you create a transform with the same configuration.
It returns a maximum of 100 results. The calculations are based on all the current data in the source index. It also generates a list of mappings and settings for the destination index. These values are determined based on the field types of the source index and the transform aggregations.
highlight#highlightFromAnchor" href="#topic-required-authorization"> Required authorization
- Index privileges:
read,view_index_metadata - Cluster privileges:
manage_transform
Path parameters
-
Identifier for the transform to preview. If you specify this path parameter, you cannot provide transform configuration details in the request body.
Query parameters
-
Period to wait for a response. If no response is received before the timeout expires, the request fails and returns an error.
Values are
-1or0.
POST
/_transform/{transform_id}/_preview
dropdown#toggle click@window->dropdown#hide touchend@window->dropdown#hide"
data-dropdown-target="button"
data-scrollable="false"
data-headings="false"
aria-expanded="false"
aria-haspopup="true"
role="menu"
tabindex="0">
Console
POST _transform/_preview
{
"source": {
"index": "kibana_sample_data_ecommerce"
},
"pivot": {
"group_by": {
"customer_id": {
"terms": {
"field": "customer_id",
"missing_bucket": true
}
}
},
"aggregations": {
"max_price": {
"max": {
"field": "taxful_total_price"
}
}
}
}
}resp = client.transform.preview_transform(
source={
"index": "kibana_sample_data_ecommerce"
},
pivot={
"group_by": {
"customer_id": {
"terms": {
"field": "customer_id",
"missing_bucket": True
}
}
},
"aggregations": {
"max_price": {
"max": {
"field": "taxful_total_price"
}
}
}
},
)const response = await client.transform.previewTransform({
source: {
index: "kibana_sample_data_ecommerce",
},
pivot: {
group_by: {
customer_id: {
terms: {
field: "customer_id",
missing_bucket: true,
},
},
},
aggregations: {
max_price: {
max: {
field: "taxful_total_price",
},
},
},
},
});response = client.transform.preview_transform(
body: {
"source": {
"index": "kibana_sample_data_ecommerce"
},
"pivot": {
"group_by": {
"customer_id": {
"terms": {
"field": "customer_id",
"missing_bucket": true
}
}
},
"aggregations": {
"max_price": {
"max": {
"field": "taxful_total_price"
}
}
}
}
}
)$resp = $client->transform()->previewTransform([
"body" => [
"source" => [
"index" => "kibana_sample_data_ecommerce",
],
"pivot" => [
"group_by" => [
"customer_id" => [
"terms" => [
"field" => "customer_id",
"missing_bucket" => true,
],
],
],
"aggregations" => [
"max_price" => [
"max" => [
"field" => "taxful_total_price",
],
],
],
],
],
]);curl -X POST -H "Authorization: ApiKey $ELASTIC_API_KEY" -H "Content-Type: application/json" -d '{"source":{"index":"kibana_sample_data_ecommerce"},"pivot":{"group_by":{"customer_id":{"terms":{"field":"customer_id","missing_bucket":true}}},"aggregations":{"max_price":{"max":{"field":"taxful_total_price"}}}}}' "$ELASTICSEARCH_URL/_transform/_preview"client.transform().previewTransform(p -> p
.pivot(pi -> pi
.aggregations("max_price", a -> a
.max(m -> m
.field("taxful_total_price")
)
)
.groupBy("customer_id", g -> g
.terms(t -> t
.field("customer_id")
.missingBucket(true)
)
)
)
.source(s -> s
.index("kibana_sample_data_ecommerce")
)
);
Request example
Run `POST _transform/_preview` to preview a transform that uses the pivot method.
{
"source": {
"index": "kibana_sample_data_ecommerce"
},
"pivot": {
"group_by": {
"customer_id": {
"terms": {
"field": "customer_id",
"missing_bucket": true
}
}
},
"aggregations": {
"max_price": {
"max": {
"field": "taxful_total_price"
}
}
}
}
}
Response examples (200)
An abbreviated response from `POST _transform/_preview` that contains a preview a transform that uses the pivot method.
{
"preview": [
{
"max_price": 171,
"customer_id": "10"
},
{
"max_price": 233,
"customer_id": "11"
},
{
"max_price": 200,
"customer_id": "12"
},
{
"max_price": 301,
"customer_id": "13"
},
{
"max_price": 176,
"customer_id": "14"
},
{
"max_price": 2250,
"customer_id": "15"
},
{
"max_price": 170,
"customer_id": "16"
},
{
"max_price": 243,
"customer_id": "17"
},
{
"max_price": 154,
"customer_id": "18"
},
{
"max_price": 393,
"customer_id": "19"
},
{
"max_price": 165,
"customer_id": "20"
},
{
"max_price": 115,
"customer_id": "21"
},
{
"max_price": 192,
"customer_id": "22"
},
{
"max_price": 169,
"customer_id": "23"
},
{
"max_price": 230,
"customer_id": "24"
},
{
"max_price": 278,
"customer_id": "25"
},
{
"max_price": 200,
"customer_id": "26"
},
{
"max_price": 344,
"customer_id": "27"
},
{
"max_price": 175,
"customer_id": "28"
},
{
"max_price": 177,
"customer_id": "29"
},
{
"max_price": 190,
"customer_id": "30"
},
{
"max_price": 190,
"customer_id": "31"
},
{
"max_price": 205,
"customer_id": "32"
},
{
"max_price": 215,
"customer_id": "33"
},
{
"max_price": 270,
"customer_id": "34"
},
{
"max_price": 184,
"customer_id": "36"
},
{
"max_price": 222,
"customer_id": "37"
},
{
"max_price": 370,
"customer_id": "38"
},
{
"max_price": 240,
"customer_id": "39"
},
{
"max_price": 230,
"customer_id": "4"
},
{
"max_price": 229,
"customer_id": "41"
},
{
"max_price": 190,
"customer_id": "42"
},
{
"max_price": 150,
"customer_id": "43"
},
{
"max_price": 175,
"customer_id": "44"
},
{
"max_price": 190,
"customer_id": "45"
},
{
"max_price": 150,
"customer_id": "46"
},
{
"max_price": 310,
"customer_id": "48"
},
{
"max_price": 223,
"customer_id": "49"
},
{
"max_price": 283,
"customer_id": "5"
},
{
"max_price": 185,
"customer_id": "50"
},
{
"max_price": 190,
"customer_id": "51"
},
{
"max_price": 333,
"customer_id": "52"
},
{
"max_price": 165,
"customer_id": "6"
},
{
"max_price": 144,
"customer_id": "7"
},
{
"max_price": 198,
"customer_id": "8"
},
{
"max_price": 210,
"customer_id": "9"
}
],
"generated_dest_index": {
"mappings": {
"_meta": {
"_transform": {
"transform": "transform-preview",
"version": {
"created": "10.0.0"
},
"creation_date_in_millis": 1712948905889
},
"created_by": "transform"
},
"properties": {
"max_price": {
"type": "half_float"
},
"customer_id": {
"type": "keyword"
}
}
},
"settings": {
"index": {
"number_of_shards": "1",
"auto_expand_replicas": "0-1"
}
},
"aliases": {}
}
}