Ignores the precheck items that a data migration or synchronization task may fail to pass.

If you call this operation to ignore all precheck items, you must call the StartMigrationJob or StartSynchronizationJob operation. DTS performs a precheck again. After the data migration or synchronization task passes the precheck, the task will be automatically started.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer automatically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes ShieldPrecheck

The operation that you want to perform. Set the value to ShieldPrecheck.

DtsInstanceId String Yes dtsi76118o3w92****

The ID of the data migration or data synchronization instance. You can call the DescribeMigrationJobs or DescribeSynchronizationJobs operation to query the instance ID.

PrecheckItems String Yes CHECK_SAME_OBJ

The precheck items that you want to ignore. Separate multiple items with commas (,). Valid values:

  • CHECK_SAME_OBJ: schema name conflict
  • CHECK_SAME_USER: multiple usernames for one instance
  • CHECK_SRC: source database version
  • CHECK_TOPOLOGY: topology
    Note For more information about the topologies supported by DTS, see Synchronization topologies.
  • CHECK_SERVER_ID: value of server_id in the source database
RegionId String No cn-hangzhou

The ID of the region where the data migration or data synchronization instance resides. For more information, see List of supported regions.

Response parameters

Parameter Type Example Description
ErrCode String InternalError

The error code returned if the call failed.

ErrMessage String The request processing has failed due to some unknown error.

The error message returned if the call failed.

RequestId String 6F4B5BC4-34B1-49C9-9C8F-C8F16AC4****

The ID of the request.

Success Boolean true

Indicates whether the call was successful.


Sample requests

&<Common request parameters>

Sample responses

XML format


JSON format

    "RequestId": "6F4B5BC4-34B1-49C9-9C8F-C8F16AC4****",
    "Success": true

Error codes

For a list of error codes, visit the API Error Center.