Splunk Enterprise

How to create a search that will compare results from search with lookup?

bosseres
Contributor

Hello everyone!

I have in search results table like A=1, B=1, C=3

I have lookup like

Type A B C
server1 1 1 4
server2 1 1 5
server3 1 1 6

 

I need to make search, that will compare results from my search with lookup and if enough one value in appropriate column is equal, than column is true, if not - false.

For example, A=1, server1, server2 and server3 = 1 in column A, i need result A=true. B - same. But in column C there is no "3" so C is false. Help me please.

Labels (2)
Tags (1)
0 Karma
1 Solution

richgalloway
SplunkTrust
SplunkTrust

Each column will have to be tested separately using separate lookups.

| lookup mylookup.csv A OUTPUT Type
| eval resultA = if(isnull(Type), "false", "true")
| lookup mylookup.csv B OUTPUT Type
| eval resultB = if(isnull(Type), "false", "true")
| lookup mylookup.csv C OUTPUT Type
| eval resultC = if(isnull(Type), "false", "true")
---
If this reply helps you, Karma would be appreciated.

View solution in original post

richgalloway
SplunkTrust
SplunkTrust

Each column will have to be tested separately using separate lookups.

| lookup mylookup.csv A OUTPUT Type
| eval resultA = if(isnull(Type), "false", "true")
| lookup mylookup.csv B OUTPUT Type
| eval resultB = if(isnull(Type), "false", "true")
| lookup mylookup.csv C OUTPUT Type
| eval resultC = if(isnull(Type), "false", "true")
---
If this reply helps you, Karma would be appreciated.

bosseres
Contributor

thank you, it works!

is it possible to make comparison in one subsearch? i mean one comparison for all columns (because i have more columns than 3)

0 Karma

richgalloway
SplunkTrust
SplunkTrust

If you want a separate result for each column then you'll need multiple lookups.  The lookup command has an implicit AND for each input field.  It returns a single result if all of the fields match the same row in the lookup file; otherwise, it returns null.

If this case, you could use

| lookup mylookup.csv A B C OUTPUT Type

and would get a null Type field if C=3.  There would be no way to know, however, which field caused the "false" result.

---
If this reply helps you, Karma would be appreciated.
0 Karma

bosseres
Contributor

I did, not actual

0 Karma
Get Updates on the Splunk Community!

Introducing the Splunk Community Dashboard Challenge!

Welcome to Splunk Community Dashboard Challenge! This is your chance to showcase your skills in creating ...

Built-in Service Level Objectives Management to Bridge the Gap Between Service & ...

Wednesday, May 29, 2024  |  11AM PST / 2PM ESTRegister now and join us to learn more about how you can ...

Get Your Exclusive Splunk Certified Cybersecurity Defense Engineer Certification at ...

We’re excited to announce a new Splunk certification exam being released at .conf24! If you’re headed to Vegas ...