Hi Taesoo,
if I get you right, you expect the standby-setup of HANA to make running queries fail safe.
This is not the case.
The standby solution allows for increased system availability. That means, the data will be available again, once the standby node has taken over as worker node.
It does not mean, that the query won't be disrupted.
For such requirements it's often a good idea to implement a re-try on application sever level. Just send the query again after a short moment.
- Lars