rahil-c commented on code in PR #9695:
URL: https://github.com/apache/iceberg/pull/9695#discussion_r1586515021


##########
open-api/rest-catalog-open-api.yaml:
##########
@@ -537,6 +537,110 @@ paths:
         5XX:
           $ref: '#/components/responses/ServerErrorResponse'
 
+  /v1/{prefix}/namespaces/{namespace}/tables/{table}/preplan:
+    parameters:
+      - $ref: '#/components/parameters/prefix'
+      - $ref: '#/components/parameters/namespace'
+      - $ref: '#/components/parameters/table'
+    post:
+      tags:
+        - Catalog API
+      summary: Prepare a list of plan tasks that can be used later for table 
scan planning
+      description:
+        Prepare a list of plan tasks that can be used later for table scan 
planning.
+        
+        Each plan task in the response of this API can be used as the 
`plan-task` in the `PlanTable` 
+        API request to perform scan planning against a subset of the table 
files.
+        
+        This can be used to parallelize and distribute table scan planning.
+      operationId: PreplanTable
+      requestBody:
+        content:
+          application/json:
+            schema:
+              $ref: '#/components/schemas/PreplanTableRequest'
+      responses:
+        200:
+          $ref: '#/components/responses/PreplanTableResponse'
+        400:
+          $ref: '#/components/responses/BadRequestErrorResponse'
+        401:
+          $ref: '#/components/responses/UnauthorizedResponse'
+        403:
+          $ref: '#/components/responses/ForbiddenResponse'
+        404:
+          description:
+            Not Found
+            - NoSuchTableException, the table does not exist
+            - NoSuchNamespaceException, the namespace does not exist
+          content:
+            application/json:
+              schema:
+                $ref: '#/components/schemas/ErrorModel'
+              examples:
+                TableDoesNotExist:
+                  $ref: '#/components/examples/NoSuchTableError'
+                NamespaceDoesNotExist:
+                  $ref: '#/components/examples/NoSuchNamespaceError'
+        419:
+          $ref: '#/components/responses/AuthenticationTimeoutResponse'
+        503:
+          $ref: '#/components/responses/ServiceUnavailableResponse'
+        5XX:
+          $ref: '#/components/responses/ServerErrorResponse'
+
+  /v1/{prefix}/namespaces/{namespace}/tables/{table}/plan:
+    parameters:
+      - $ref: '#/components/parameters/prefix'
+      - $ref: '#/components/parameters/namespace'
+      - $ref: '#/components/parameters/table'
+    post:
+      tags:
+        - Catalog API
+      summary: Perform scan planning against a table
+      operationId: PlanTable
+      description:
+        Perform scan planning against a table based on the scan requirements 
including selected columns and filters.
+        
+        An optional `plan-task` can be provided from a `PreplanTableResponse`
+        to limit the request of the full task set to a subset of table files.
+        If a valid `plan-task` is provided, the service must attempt to send 
all results for that planning task.

Review Comment:
   will fix 



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