Start Data Comparison Precheck

Start the precheck for a specified data comparison task. The precheck verifies whether source and target connections, privileges, and related conditions meet data comparison requirements.

Request URL: /openapi/v1/comparedata/precheck/start

Request Method: POST

Before You Call

taskId can be obtained from data in the successful response of Create Data Comparison Task, or confirmed through data.id returned by Query Data Comparison Main Task Details.

Request Body

{
  "taskId": "cd-tg3isu1xgs"
}

Request Parameters

Parameter	Type	Required	Description	Example
taskId	String	Yes	ID of the data comparison task for which to start the precheck.	cd-tg3isu1xgs

Response Parameters

Parameter	Type	Description	Example
success	Boolean	Whether the request is successful.	true
requestId	String	Request ID, which can be used for troubleshooting and tracing.	Fj2z8KDA-kqqraVGnllse6BZdmnh5DQM
data	Object	Precheck task information.	See the field descriptions below

data Fields

Parameter	Type	Description	Example
taskId	String	ID of the data comparison task for which the precheck is started.	cd-tg3isu1xgs
precheckTaskId	String	ID of the submitted precheck task. Use this value to query the precheck status.	pcte-dj02vti9tabd

Successful Invocation Example

{
  "success": true,
  "requestId": "Fj2z8KDA-kqqraVGnllse6BZdmnh5DQM",
  "data": {
    "taskId": "cd-tg3isu1xgs",
    "precheckTaskId": "pcte-dj02vti9tabd"
  }
}

Result

A successful response returns precheckTaskId, which identifies the submitted precheck. Use this value to query the precheck status before starting the data comparison task.