[1.2.0] Cannot read from measurement if its name is starting with an underscore.

[mariusoe]

Bug report

Hey,

in InfluxDB version 1.2.0 it is not possible to read from measurements starting with an underscore. If the name of a measurement starts with "_" the response is always empty. In a previous version (e.g. 1.0.1), the measurements could be queried as expected.

System info: Windows 7 / InfluxDB 1.2.0

Steps to reproduce:

1. Create a measurement starting with an underscore. E.g.: _data
2. Reading from the measurement. E.g.: SELECT * FROM _data

Expected behavior: The data contained in the measurement

Actual behavior: An empty response

[e-dard]

Thanks for the report @mariusoe.

Confirmed:

 // ⇒  influxd-v1.1.0

> insert _hello value=1
> select * from _hello
name: _hello
time                value
----                -----
1488198319116228104 1

// ⇒  influxd-v1.2.1-rc5

> insert _hello value=1
> select * from "_hello"
> select * from _hello
> select * from "db".."_hello"
> show measurements
name: measurements
name
----
_hello
cpu

>

[e-dard]

Possible dupe of #7961.

[gerrickw]

Have the same issue, is there a way to workaround this issue? I have a bunch of measurements that start with '_'.

[e-dard]

Fixed via #8069