Github user bbonnin commented on the pull request:
https://github.com/apache/incubator-zeppelin/pull/520#issuecomment-165447978
In the last commit, I have added the possibility to search by just
providingthe content of a quey_string. I think it's simpler and based on Lucene
query syntax.
For example:
```
search /logs (status:404 AND request.method:POST)
```
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