Howto extract a substring from string type query

Grafana Time Series Panel
1

I’m using InfluxDB and Grafana 8.3.
I’ve also log data in InfluxDB, therefore fields of type string.
I’d like to extract a part of the string from the returned query data and display this in a table.
The field data is like a key=value list, and I need the chars between a prefix and a delimiter.
Best would be a regular expression, like /tag=(.*?),/.
Is there any mechanism in Grafana to do this ?

2

can you please follow these steps to share your raw unformatted data? That way, the community can try and mock up your problem :+1:

3

The data comes from log messages of the form

some_text: key1=val1, key2=val2, ...

So a regular expression like /key1=([^,]*)/ would for example extract val1.

4

For the extraction of variables there is a mechanism to parse and pick, see

But it is, as far as I understand, specific for setting up variables.
What I’m looking for is a mechanism which returns sub-strings which can be visualized with a table panel.

5

hi, did you get what you were looking for ? I beleive I have a similar problem, but I have almost out of ideas, probably grafana still not cover what I need.

6

Welcome

Please provide sample data as follows

_time,_value,_measurement,_field
2022-07-12 10:00:18.240,96.27,mqtt_consumer,Kettle
2022-07-12 11:00:18.240,50.54,mqtt_consumer,Kettle
2022-07-12 12:00:18.240,99.59,mqtt_consumer,Kettle
2022-07-12 13:00:18.240,92.83,mqtt_consumer,Kettle
2022-07-12 14:00:18.240,76.01,mqtt_consumer,Kettle
2022-07-12 15:00:18.240,28.23,mqtt_consumer,Kettle
2022-07-12 16:00:18.240,37.46,mqtt_consumer,Kettle
7

Hi yosiasz, I get to separate the data but now I need to move the obtain values to fields, this way I can make a join transformationI cant find any transformation to get the result values and place it as field

8

hey @migb still waiting for you to provide sample data. Help us help you by providing that data. Is there any reason you cannot? We cant remotely read your data.

9

not at all, is just that I found another way to get the data to no extract the strings

1 Like
10

not sure I understand what you are saying but it seems you have been able to resolve your issue.

11

right, but now I have another one (different topic)

1 Like
12

Hello, I am facing similar problem now, can you tell me how you resolved it?I am using splunk datasource plugin with grafana.i want to get a subsstring from query results into a table