Hello,
I’m on Grafana 8.1.3, and my datasource is “checkmk datasource”.
As you can see, with PNP database (or influxdb), the Null values are ok (Blue line).
But with checkmk datasource (yellow line), the Null values not appears.
For me, the reason is because with checkmk datasource we have not “Fill option”.
(Fill : Zero).
Considering that, is it possible with “transform option” to say : “if no value then Zero” ?
Thank you.
You can do this using the special option inside value mappings, not transformations:
see this dashboard for an example:
https://play.grafana.org/d/s8ep4PAnz/mja-add-field-transformation?orgId=1&editPanel=2
Hello,
Thank you for your time.
I try but that do not work.
I send value 100, then 0, and we don’t see the 0, we just see a 71.7 during the transition.
I do that :
But the probleme is the same :
Maybe I miss something?
Thank you
Hello again,
In your example, if you remove all Value mappings and add:
You have the same result, the missing value become “0”
Maybe it’s not possible with “Checkmk datasource”
are you using this plugin?
Hello, yes, I use the Checkmk-datasource.
I have this problem with this only one database. With InfluxDB, PNPnagios, elastic… I don’t have this probleme.
For me, the reason is because with checkmk datasource we have not “Fill option”. (Fill : Zero)
Thank you.
ok, that helps a lot. Because the CheckMK datasource is a third-party plugin, I think your best bet is to file an issue in their repo 
Hello,
it’s already done ^^ :
Thank you
