> ## Documentation Index > Fetch the complete documentation index at: https://docs.eorion.com/llms.txt > Use this file to discover all available pages before exploring further. # 获取计数 > Queries for the number of historic decision instances that fulfill the given parameters. Takes the same parameters as the [Get Historic Decision Instances](https://docs.camunda.org/manual/7.22/reference/rest/history/decision-instance/get-decision-instance-query/) method. ## OpenAPI ````yaml GET /history/decision-instance/count openapi: 3.0.2 info: title: ORION Platform REST API description: OpenApi Spec for ORION Camunda Platform REST API. version: 7.22.6-ee license: name: Apache License 2.0 url: http://www.apache.org/licenses/LICENSE-2.0.html servers: - url: http://{host}:{port}/{contextPath} description: The API server for the default process engine variables: host: default: localhost port: default: '8080' contextPath: default: engine-rest - url: http://{host}:{port}/{contextPath}/engine/{engineName} description: The API server for a named process engine variables: host: default: localhost port: default: '8080' contextPath: default: engine-rest engineName: default: default - url: '{url}' description: The API server with a custom url variables: url: default: '' security: - basicAuth: [] tags: - name: Authorization - name: Batch - name: Condition - name: Decision Definition - name: Decision Requirements Definition - name: Deployment - name: Engine - name: Event Subscription - name: Execution - name: External Task - name: Filter - name: Group - name: Historic Activity Instance - name: Historic Batch - name: Historic Decision Definition - name: Historic Decision Instance - name: Historic Decision Requirements Definition - name: Historic Detail - name: Historic External Task Log - name: Historic Identity Link Log - name: Historic Incident - name: Historic Job Log - name: Historic Process Definition - name: Historic Process Instance - name: Historic Task Instance - name: Historic User Operation Log - name: Historic Variable Instance - name: History Cleanup - name: Identity - name: Incident - name: Job - name: Job Definition - name: Message - name: Metrics - name: Migration - name: Modification - name: Process Definition - name: Process Instance - name: Signal - name: Schema Log - name: Task - name: Task Attachment - name: Task Comment - name: Task Identity Link - name: Task Local Variable - name: Task Variable - name: Telemetry - name: Tenant - name: User - name: Variable Instance - name: Version externalDocs: description: Find out more about ORION Rest API url: https://docs.eorion.com paths: /history/decision-instance/count: get: tags: - Historic Decision Instance summary: Get Historic Decision Instance Count description: >- Queries for the number of historic decision instances that fulfill the given parameters. Takes the same parameters as the [Get Historic Decision Instances](https://docs.camunda.org/manual/7.22/reference/rest/history/decision-instance/get-decision-instance-query/) method. operationId: getHistoricDecisionInstancesCount parameters: - name: decisionInstanceId in: query schema: type: string description: Filter by decision instance id. - name: decisionInstanceIdIn in: query schema: type: string description: >- Filter by decision instance ids. Must be a comma-separated list of decision instance ids. - name: decisionDefinitionId in: query schema: type: string description: Filter by the decision definition the instances belongs to. - name: decisionDefinitionIdIn in: query schema: type: string description: >- Filter by the decision definitions the instances belongs to. Must be a comma-separated list of decision definition ids. - name: decisionDefinitionKey in: query schema: type: string description: >- Filter by the key of the decision definition the instances belongs to. - name: decisionDefinitionKeyIn in: query schema: type: string description: >- Filter by the keys of the decision definition the instances belongs to. Must be a comma- separated list of decision definition keys. - name: decisionDefinitionName in: query schema: type: string description: >- Filter by the name of the decision definition the instances belongs to. - name: decisionDefinitionNameLike in: query schema: type: string description: >- Filter by the name of the decision definition the instances belongs to, that the parameter is a substring of. - name: processDefinitionId in: query schema: type: string description: Filter by the process definition the instances belongs to. - name: processDefinitionKey in: query schema: type: string description: >- Filter by the key of the process definition the instances belongs to. - name: processInstanceId in: query schema: type: string description: Filter by the process instance the instances belongs to. - name: caseDefinitionId in: query schema: type: string description: Filter by the case definition the instances belongs to. - name: caseDefinitionKey in: query schema: type: string description: Filter by the key of the case definition the instances belongs to. - name: caseInstanceId in: query schema: type: string description: Filter by the case instance the instances belongs to. - name: activityIdIn in: query schema: type: string description: |- Filter by the activity ids the instances belongs to. Must be a comma-separated list of acitvity ids. - name: activityInstanceIdIn in: query schema: type: string description: |- Filter by the activity instance ids the instances belongs to. Must be a comma-separated list of acitvity instance ids. - name: tenantIdIn in: query schema: type: string description: >- Filter by a comma-separated list of tenant ids. A historic decision instance must have one of the given tenant ids. - name: withoutTenantId in: query schema: type: boolean description: >- Only include historic decision instances that belong to no tenant. Value may only be `true`, as `false` is the default behavior. - name: evaluatedBefore in: query schema: type: string format: date-time description: >- Restrict to instances that were evaluated before the given date. By [default](https://docs.camunda.org/manual/7.22/reference/rest/overview/date-format/), the date must have the format `yyyy-MM- dd'T'HH:mm:ss.SSSZ`, e.g., `2013-01-23T14:42:45.000+0200`. - name: evaluatedAfter in: query schema: type: string format: date-time description: >- Restrict to instances that were evaluated after the given date. By [default](https://docs.camunda.org/manual/7.22/reference/rest/overview/date-format/), the date must have the format `yyyy-MM- dd'T'HH:mm:ss.SSSZ`, e.g., `2013-01-23T14:42:45.000+0200`. - name: userId in: query schema: type: string description: Restrict to instances that were evaluated by the given user. - name: rootDecisionInstanceId in: query schema: type: string description: |- Restrict to instances that have a given root decision instance id. This also includes the decision instance with the given id. - name: rootDecisionInstancesOnly in: query schema: type: boolean description: >- Restrict to instances those are the root decision instance of an evaluation. Value may only be `true`, as `false` is the default behavior. - name: decisionRequirementsDefinitionId in: query schema: type: string description: >- Filter by the decision requirements definition the instances belongs to. - name: decisionRequirementsDefinitionKey in: query schema: type: string description: >- Filter by the key of the decision requirements definition the instances belongs to. responses: '200': content: application/json: schema: $ref: '#/components/schemas/CountResultDto' examples: example-1: summary: GET `/history/decision-instance/count` value: count: 4 description: Request successful. '400': content: application/json: schema: $ref: '#/components/schemas/ExceptionDto' description: >- Returned if some of the query parameters are invalid. See the [Introduction](https://docs.camunda.org/manual/7.22/reference/rest/overview/#error-handling) for the error response format. components: schemas: CountResultDto: type: object properties: count: type: integer format: int64 description: The number of matching instances. ExceptionDto: title: ExceptionDto type: object properties: type: type: string nullable: true description: An exception class indicating the occurred error. message: type: string nullable: true description: A detailed message of the error. code: type: number description: >- The code allows your client application to identify the error in an automated fashion. You can look up the meaning of all built-in codes and learn how to add custom codes in the [User Guide](https://docs.camunda.org/manual/7.22/user-guide/process-engine/error-handling/#exception-codes). securitySchemes: basicAuth: type: http scheme: basic ````