If Unity encounters an error during a Read request, it checks for the error code and responds as follows.
| Error is | Response |
|---|---|
| Listed in the Error Profile and set to perform a Failover | Resubmits the query to another Teradata Database system. Unity selects the Teradata Database System with the shortest working queue at that time. |
| Listed in the Error Profile and set to Retry | Resubmits the query to the same Teradata Database system. |
| Listed in the Error Profile and set to Exit | Session closes on all Teradata Database systems. |
| Not listed in the Error Profile | Error is returned to the client. |