The following table shows when SQL statements are allowed depending on the Teradata Database or table state.
Teradata Database or Table State | Read Requests | Write Requests |
---|---|---|
Active | Yes | Yes |
Read-Only | Yes | No |
Standby | No (if there is another active copy of the table or system) | Yes (after completing on the active system) |
Out of Service | No | No |
Disconnected | No | No |
Interrupted | No | No |
Restore | No | No |
Unrecoverable | No | No |
Write requests are rejected if there are no systems where the table is in an Active or Standby state.