View and modify migration objects and their filter conditions

Background

You can add or remove migration objects and modify their filter conditions during migration under the specified limitations. The changes made are recorded. When an object modification task is completed, it is integrated with the associated original task. When the integration is completed, the original task runs normally and the object modification task is automatically released.

For information about how to modify the migration objects specified by using the Match Rules option of a data migration task as well as their SQL filter conditions, see Configure and modify matching rules.

Limitations

• For a data migration task whose migration objects are selected only by using the Specify Objects option, you can modify its migration objects.

• For a data migration task in the Not Started, Running, or Stopped state, you can add or remove its migration objects.

  Important

  For a data migration task in the Stopped state, if the Full Migration or Incremental Synchronization step of the task is also in the Stopped state, you cannot add its migration objects.

• For a data migration task in the Failed state, you cannot add its migration objects.

• For a data migration task in the Modifying or Integrating state, you cannot modify its migration objects again.

• When the Full Migration or Incremental Synchronization step of a data migration task is in the Stopped or Failed state, you cannot add its migration objects.

• In the reverse increment phase of a data migration task, you cannot add its migration objects.

• When you migrate data from a PolarDB-O database to an OceanBase database in Oracle-compatible mode, you cannot add migration objects.

• When you migrate data from a Lindorm or HBase database to OBKV, you cannot add migration objects or modify row filter conditions.

• For a data migration task in the Stopped, Failed, Not Started, or Running state, you can modify its row filter conditions.

View migration objects

1. Log on to the

   OceanBase Management Console
   .

2. In the left-side navigation pane, choose Data Transmission > Data Migration.

3. On the Migrate Data page, click the name of the target task to go to its details page.

   

4. Click View Objects in the upper-right corner and view information on the Migration Scope and Object Modifications tabs.

   • The Migration Scope tab displays the migration objects of the current task. You can add or remove objects, and modify their row filter conditions.

   • The Object Modifications tab displays the types, status, and occurrence time of all object modifications.

Add migration objects

1. On the details page of the target task, click View Objects in the upper-right corner.

   

2. In the View Objects dialog box, choose Migration Scope > Add Objects.

   

3. In the Add Objects dialog box, select migration objects in the left-side Source Object(s) section and click > to add them to the right-side list. You can select tables and views of one or more databases as the migration objects.

   

   After you select the migration objects to add, you can perform operations such as renaming objects, setting row filters, viewing column information, and removing objects.

   

   Important

   • By default, the newly added migration objects inherit all configuration options of the original data migration task. If you abort the object addition operation, you must manually delete the objects that have been added to the target database.

   • If you specified the schema name or DB name for the source data source, you can add only the migration objects under the specified schema name or database name.

4. Click Next.

5. The system automatically performs a precheck on the added objects. After the added objects pass all check items, click Save.

6. Confirm the information and click OK in the dialog box that appears.

   • For a stopped or failed task, you can cancel the operation and modify the objects again. The objects will be added only after the data migration task is resumed.

   • If you add objects for a running task, after you click Save, the objects are immediately added.

   When an object addition operation begins, the corresponding record is generated. To view the details of the record, click View Objects on the details page of the task and then click the Object Modifications tab.

   

   The status of an object addition record can be Pending, Canceled, Modifying, Running, Aborted, Integrating, Succeeded, or Failed. The operations that you can perform on an object addition record and the status of the original task vary with the status of the object addition record.

   Note

   If the original task is in the Not Started state, a modification record in the Succeeded state is generated for an object addition operation. If the original task is in the Stopped state, a modification record in the Pending state is generated for an object addition operation.

   The status of an object addition record changes only when the original task is in the Running state, and the status of the original task changes along with the status of the object addition record. The following table describes more information.

   Status of an object addition record	Supported operation	Status of the original task
   Pending	View details and cancel.	Running
   Canceled	None	Running
   Modifying	None	Modifying
   Running	View details and abort.	Modifying
   Aborted	View details.	Running
   Integrating	View details.	Integrating
   Succeeded	View details.	Running
   Failed	View details and retry. You can also click View Causes to go to the task details page and view the failure causes.	Modifying or Integrating

Remove migration objects

1. On the details page of the target task, click View Objects in the upper-right corner.

   

2. In the View Objects dialog box, choose Migration Scope > Remove Objects.

   

3. In the Remove Objects dialog box, hover over a migration object that you want to remove in the Target Object(s) section on the right and click Remove.

4. In the Remove Objects dialog box, click Remove.

5. In the confirmation dialog box that appears, confirm the object to remove and click OK.

   If the task is in the Stopped, Failed, or Running state, after you click OK, the object is immediately removed.

   Important

   • A removed object cannot be recovered. Proceed with caution.

   • The final result of the object removal operation is either succeeded or failed for all objects.

   When an object removal operation begins, the corresponding record is generated. To view the details of the record, click View Objects on the details page of the task and then click the Object Modifications tab.

   

   The status of an object removal record can be Pending, Canceled, Modifying, Succeeded, or Failed. The operations that you can perform on an object removal record and the status of the original task vary with the status of the object removal record.

   Status of an object removal record	Supported operation	Status of the original task
   Pending	View details and cancel.	Running
   Canceled	None	Running
   Modifying	View details.	Modifying
   Succeeded	View details.	Running
   Failed	View details and retry. You can also click View Causes to go to the task details page and view the failure causes.	Modifying

Modify the filter conditions for migration objects

You can modify the SQL conditions to filter data for migration objects selected by using the Specify Objects option when a data migration task is running.

1. On the details page of the target task, click View Objects in the upper-right corner.

   

2. In the View Objects dialog box, click the Migration Scope tab, expand the target database, hover over the target object, and click Settings.

   

3. In the Row Filters section of the Settings dialog box, specify a standard SQL WHERE clause to configure or modify row filters. For more information, see Use SQL conditions to filter data.

   

4. Click Validate Syntax.

5. After the validation succeeds, click OK in the Settings dialog box.

6. In the dialog box that appears, click Apply to apply the modification to the object.

7. On the Object Modifications tab, view the modification progress.

   

   You can also click View Details to go to the Modify Setting Details page, hover over the target data table, and click View Settings to view the modified row filters.