topic Re: Comparing two fields with > operator in Splunk Search

Comparing two fields with > operator

srw46 — Tue, 06 Jul 2010 15:59:39 GMT

Hello,

I am trying to compare two fields with a simple operator but it does not seem to perform as expected. I am simply trying to return any transaction times that are over the value of the 'threshold' field. This is what I'm trying:

time_taken>threshold

I have found another way around this by using the eval command:

eval over=time_taken-threshold | search over>0

This essentially does the same thing in a very round about way but it less than neat.

Is there something i'm missing to compare field to another field? I have scoured documention but can't find any examples of this.

Thanks in advance

Re: Comparing two fields with > operator

Lowell — Tue, 06 Jul 2010 20:43:52 GMT

I think you want to use where and not search. The where search operation lets you compare variables or even eval expressions, but search only looks for literal values. Here's an example.

This search is looking for a field named "user" that contains the value of "login":

| search user=login
This search is looking for a field named "user" that contains the same value as the field named "login":

| where user=login

So you should be able to take your example search expression:

| eval over=time_taken-threshold | search over>0

And change it to either:

| where (time_taken-threshold)>0

| where time_taken>threshold

Re: Comparing two fields with > operator

srw46 — Wed, 07 Jul 2010 14:01:13 GMT

Splendid.

Thank you again Lowell.