[0.9.3] inserting NaNs causes value to become unqueryable.

[DanielMorsing]

> create database foo
> use foo
Using database foo
> insert cpu value=200
> insert cpu foobar=nan
> select * from cpu
ERR: invalid character 'j' looking for beginning of value
> select value from cpu
name: cpu
---------
time                value
2015-09-15T15:18:10.512161841Z  200

[timraymond]

@DanielMorsing To help with reproducing this issue, could you prefix the title of this issue with the version of Influx that you're encountering this under (e.g. [0.x.x] inserting NaNs...)?

Also helpful information would be the OS that you're using and whether this is a cluster or single node setup.

[malaakso]

I have the same problem: 0.9.3, Linux, single node.

[beckettsean]

Similar to #3994

[luciotorre]

Fwiw, I have the same problem: 0.9.4, Linux, single node.

[rajeshmurali]

select * from cpu where value>=0 works,
Case 2:
Now try to insert a value for foobar field
example: insert cpu foobar=123
this query is successful
now try to fetch the values from foobar field by using the query
select * from cpu where foobar>=0

using the query select * from cpu is confusing influxdb or influxdb could not display a field with Not a Number (NaN) value

[jwilder]

Fixed via 0926b19