Using fillnull_value or fillnull value with Tstats

[Godspeed_74]

I am trying to fill the null values and using a datamodel. I want to use tstats and fill null values will "Null" using fillnull. How should I use it with tstats? 

[richgalloway]

Could you please tell us more about the problem you are trying to solve?  The tstats command does not have a 'fillnull' option.  Recall that tstats works off the tsidx files, which IIRC does not store null values.

[Godspeed_74]

According to the Tstats documentation, we can use fillnull_values which takes in a string value. I tired using that, but it didn't work. 

[richgalloway]

Please share your query.

[Godspeed_74]

trying to use this
| tstats summariesonly=true allow_old_summaries=true fillnull_value="NULL" count FROM datamodel=Linux_System.Linux_System  WHERE (Linux_System.src_host=*) by src_host

[richgalloway]

Do you have src_host fields with null values?

[Godspeed_74]

Yes, it has null values.