creating a time delta field

[NeharikaVats]

The requirement is to create a time delta field which has the value of time difference between the 2 time fields. Basically the difference between start time & receive time should populate under new field name called timediff.

I have created eval conditions, can anyone help me with a props config based on that.

index=XXX sourcetype IN(xx:xxx, xxx:xxxxx)
| eval indextime=strftime(_indextime,"%Y-%m-%d %H:%M:%S")
| eval it = strptime(start_time, "%Y/%m/%d %H:%M:%S")
| eval ot = strptime(receive_time, "%Y/%m/%d %H:%M:%S")
| eval diff = tostring((ot - it), "duration")
| table start_time, receive_time,indextime,_time, diff

[bowesmana]

You should be able to create a calculated field called diff with the following value

tostring(strptime(receive_time, "%Y/%m/%d %H:%M:%S") - strptime(start_time, "%Y/%m/%d %H:%M:%S"), "duration")

[NeharikaVats]

what if i want to get the difference between _indextime & start_time, i am trying with this :

tostring(strftime(_indextime, "%Y/%m/%d %H:%M:%S") - strptime(start_time, "%Y/%m/%d %H:%M:%S"), "duration")

but getting error like- Encountered the following error while trying to save: Operator requires numeric types

My search is:

index=xxx_xxx_firewall sourcetype IN(xxx:xxxxx, xxx:xxxxx)
| eval indextime=strftime(_indextime,"%Y-%m-%d %H:%M:%S")
| eval it = strptime(start_time, "%Y/%m/%d %H:%M:%S")
| eval ot = strptime(receive_time, "%Y/%m/%d %H:%M:%S")
| eval diff = tostring((ot - it), "duration")
| table start_time, receive_time,indextime,_time, diff

Can you please help if you have some insights on this.

[ITWhisperer]

_indextime is already an epoch time - try this

tostring(_indextime - strptime(start_time, "%Y/%m/%d %H:%M:%S"), "duration")

[PickleRick]

My two cents - as I always say - leave the time related values as numbers until you need to finally render them to string for presentation. That way it's easier to manipulate them  (sort, offset and so on).

So I'd do just

_indextime - strptime(start_time, "%Y/%m/%d %H:%M:%S")