How to count the flag values assigned in a column from an eval?

[packet_hunter]

Scenario:
I have a search that evaluates email events (given a specific subject) to count the number of recipients per individual email and then sum the total number of recipients from all emails (given the same subject). The search also looks for recipients on a watch_list.csv with a flag to create a yes or no value next to the watched emailaddress.

Now I need a column (total_on_watch_list) with the total number of "yes" recipients.

Search:

index=mail sourcetype=xemail [search index=mail sourcetype=xemail subject = "Blah" |stats count by UID| fields UID] 
|stats list(subject) as subj list(sender) as sender list(recipient) as recp list(vendor_action) as status by UID            
|lookup watch_list.csv emailaddress as recp OUTPUT flag emailaddress 
|eval on_watch_list=if(flag=1,"yes","no") 
| fields - flag         
|eval recp_count=mvcount(recp)          
|eventstats sum(recp_count) as total_recipients

Please provide an example.

Much appreciated

[somesoni2 · Accepted solution]

Try something like this

your current search  | eventstats count(eval(on_watch_list="yes"))) as total_on_watch_list 

[packet_hunter]

| eventstats count(eval(on_watch_list = "yes")) as total_on_watch_list

works great!!! Thank you!