Github user AhyoungRyu commented on the issue:
https://github.com/apache/zeppelin/pull/2085
@tinkoff-dwh Saw your latest update. As you did,
```
###### Usage
For example in database exist user `user1` with some password and exists
user with same name into Zeppelin. Configure the jdbc interpreter (postgres),
set `default.user = #{user}`.
1. Sign in (as `user1`)
2. Open interpreter
3. Execute `select current_user`
```
The above usage example can be added [JDBC interpreter
docs](https://zeppelin.apache.org/docs/0.8.0-SNAPSHOT/interpreter/jdbc.html).
But it's okay we can update it in later time not in this PR. LGTM
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