Help Center/ DataArts Studio/ FAQs/ DataArts Migration/ Why Is Error ORA-01555 Reported During Migration from Oracle to DWS?

Updated on 2023-03-01 GMT+08:00

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Why Is Error ORA-01555 Reported During Migration from Oracle to DWS?

When CDM is used to migrate Oracle data to DWS, an error is reported, as shown in Figure 1.

Figure 1 Symptom

During data migration, if the entire table is queried and the table contains a large amount of data, the query takes a long time.
During the query, other users frequently perform the commit operation.
The RBS (the tablespace used for rollback) of Oracle is small. As a result, the migration task is not complete, the source database has been updated, and the rollback times out.

Parent topic: DataArts Migration

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