I am trying to write a where clause on InfluxDB where the points are filtered via their key values.
My points have the field ping_to_google.com and the tag key user where user can be raspi-2 or raspi-5. This is a sample output of the database:
> select * from networks where time > now()-1h
name: networks
time ping_to_google.com user
---- ------------------ ----
1645494054000000000 3.528 raspi-2
1645494078000000000 3.578 raspi-2
I am using InfluxDB version 1.8 and InfluxDB shell version 1.6.4
This query will work!
select * from networks where time > now()-1h AND "user"='raspi-2'
According to the documentation of the influxDB you should only single qoute tag values:
Tags
tag_key <operator> ['tag_value']
Single quote tag values in the WHERE clause. Queries with unquoted tag values or double quoted tag values will not return any data and, in most cases, will not return an error.
They don't specify how to write tag keys. It is crazy that the database does not produce any errors in most cases. Also, it's not clear (and very unexpected after reading this documentation) that the tag key should be double-qouted. But this works and is how to do it!