use /v2/datasets/{datasetId}/statistics approach

apify-api/openapi/components/schemas/datasets/GetDatasetStatisticsResponse.yaml

@@ -0,0 +1,15 @@
+title: GetDatasetStatisticsResponse
+required:
+  - data
+type: object
+properties:
+  data:
+    type: object
+    properties:
+        fieldStatistics:
+          type: object
+          additionalProperties:
+            $ref: ./DatasetFieldStatistics.yaml
+          description: 'When you configure the dataset [fields schema](https://docs.apify.com/platform/actors/development/actor-definition/dataset-schema/validation), we measure the statistics such as `min`, `max`, `nullCount` and `emptyCount` for each field.
+          This property provides statistics for each field from dataset fields schema.
+          <br/></br>See dataset field statistics [documentation](https://docs.apify.com/platform/actors/development/actor-definition/dataset-schema/validation#dataset-field-statistics) for more information.'

apify-api/openapi/components/tags.yaml

@@ -758,8 +758,8 @@
   x-legacy-doc-urls:
   - '#/reference/datasets/item-collection'
   x-trait: 'true'
-- name: Datasets/Field statistics
-  x-displayName: Field statistics
+- name: Datasets/Statistics
+  x-displayName: Statistics
   x-parent-tag-name: Datasets
   x-trait: 'true'
 - name: Request queues

apify-api/openapi/components/x-tag-groups.yaml

@@ -62,7 +62,7 @@
   - Datasets/Dataset collection
   - Datasets/Dataset
   - Datasets/Item collection
-  - Datasets/Field statistics
+  - Datasets/Statistics
 - name: Request queues
   tags:
   - Request queues

apify-api/openapi/openapi.yaml

@@ -566,8 +566,8 @@ paths:
     $ref: 'paths/datasets/datasets@{datasetId}.yaml'
   '/v2/datasets/{datasetId}/items':
     $ref: 'paths/datasets/datasets@{datasetId}@items.yaml'
-  '/v2/datasets/{datasetId}/field-statistics':
-    $ref: 'paths/datasets/datasets@{datasetId}@field-statistics.yaml'
+  '/v2/datasets/{datasetId}/statistics':
+    $ref: 'paths/datasets/datasets@{datasetId}@statistics.yaml'
   /v2/request-queues:
     $ref: paths/request-queues/request-queues.yaml
   '/v2/request-queues/{queueId}':

apify-api/openapi/paths/datasets/datasets@{datasetId}@statistics.yaml

@@ -0,0 +1,49 @@
+get:
+  tags:
+    - Datasets/Statistics
+  summary: Get dataset statistics
+  description: |
+    Returns statistics for given dataset.
+    Currently provides only [field statistics](https://docs.apify.com/platform/actors/development/actor-definition/dataset-schema/validation#dataset-field-statistics).
+
+  operationId: dataset_statistics_get
+  parameters:
+    - name: datasetId
+      in: path
+      description: Dataset ID or `username~dataset-name`.
+      required: true
+      style: simple
+      schema:
+        type: string
+        example: WkzbQMuFYuamGv3YF
+    -   name: token
+        in: query
+        description: |
+            API authentication token. It is required only when using the `username~dataset-name` format for `datasetId`.
+        style: form
+        explode: true
+        schema:
+            type: string
+            example: soSkq9ekdmfOslopH
+  responses:
+    '200':
+      description: ''
+      content:
+        application/json:
+          schema:
+            $ref: "../../components/schemas/datasets/GetDatasetStatisticsResponse.yaml"
+          example:
+            data:
+              fieldStatistics:
+                name:
+                  nullCount: 122
+                price:
+                  min: 59
+                  max: 89
+# TODO: add clients methods
+#  x-js-parent: DatasetClient
+#  x-js-name: statistics
+#  x-js-doc-url: https://docs.apify.com/api/client/js/reference/class/DatasetClient#statistics
+#  x-py-parent: DatasetClientAsync
+#  x-py-name: statistics
+#  x-py-doc-url: https://docs.apify.com/api/client/python/reference/class/DatasetClientAsync#statistics