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OpenSearch:CreateFirstRank

Last Updated:Dec 08, 2025

Creates a rough sort expression for a version of an OpenSearch application. If you set `dryRun` to true, this operation validates the specified rough sort expression. By default, the value of `dryRun` is `false`.

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RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

opensearch:WriteFirstRank

*FirstRank

acs:opensearch:{#regionId}:{#accountId}:apps/{#AppGroupId}

None None

Request syntax

POST /v4/openapi/app-groups/{appGroupIdentity}/apps/{appId}/first-ranks HTTP/1.1

Path Parameters

Parameter

Type

Required

Description

Example

appGroupIdentity

string

Yes

The name of the application.

my_app_group_name

appId

integer

Yes

The version number of the application.

110157886

Request parameters

Parameter

Type

Required

Description

Example

dryRun

boolean

No

Specifies whether to perform a dry run.

true

body

FirstRank

No

The request body, which contains the information about the rough sort expression.

Request body

ParameterTypeRequiredExampleDescription
nameStringYes"test"The name of the expression.
typeStringYes"STRUCT"The type of the expression. Valid values:
- STRUCT: The expression is a structure. This is the default value.
- STRING: The expression is a custom formula.

metaArray or StringYesThe content of the expression.
descriptionStringNo"my_test"The description of the expression.
activeBooleanNotrueSpecifies whether the expression is the default one.

Response elements

Element

Type

Description

Example

object

requestId

string

The request ID.

0A6EB64B-B4C8-CF02-810F-E660812972FF

result

object

The information about the rough sort expression.

active

boolean

Indicates whether the expression is the default one.

true

name

string

The name of the expression.

default

meta

array<object>

The content of the expression.

object

arg

string

The parameters that are used by a function in the expression.

1

attribute

string

The attribute, feature functions, or field to be searched for.

static_bm25()

weight

number

The weight. Valid values: [-100000, 100000]. The value cannot be 0.

10

Examples

Success response

JSON format

{
  "requestId": "0A6EB64B-B4C8-CF02-810F-E660812972FF",
  "result": {
    "active": true,
    "name": "default",
    "meta": [
      {
        "arg": "1",
        "attribute": "static_bm25()",
        "weight": 10
      }
    ]
  }
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.