Reference a calculated field within another calculated field

RWL01 — Thu, 02 May 2019 20:22:54 GMT

Is it possible to reference a calculated field within another calculated field?

My original search query was:

| eval SourceServer=substr(source, 11, 6)
| eval SourceInstance=case(
     SourceServer=="AAA001", "PROD", 
     SourceServer=="AAA002", "PROD", 
     SourceServer=="BBB001", "UAT", 
     SourceServer=="BBB002", "UAT",
    1=1, "UNKNOWN")

My intention was to create two calculated fields. However, it doesn't look like SourceServer is processed before SourceInstance is, so all of the Events resolve to "UNKNOWN".

My alternative is to repeat the same logic for each option in the case statement which seems pretty inefficient.

SourceInstance

case(
     substr(source, 11, 6)=="AAA001", "PROD", 
     substr(source, 11, 6)=="AAA002", "PROD", 
     substr(source, 11, 6)=="BBB001", "UAT", 
     substr(source, 11, 6)=="BBB002", "UAT",
    1=1, "UNKNOWN")

When I try to chain them together in a single field, like the simplified example below I get the error "Encountered the following error while trying to update: Unexpected token"

| eval foo=4 | eval bar=foo+4

Is there anyway to accomplish the logic of my original query without having to repeat the first query for every option of the case statement in the second query?

Re: Reference a calculated field within another calculated field

MuS — Thu, 02 May 2019 20:32:37 GMT

Hi RWL01,

there must be something wrong somewhere else, because both examples work fine here:

First one:

| makeresults 
| eval SourceServer=substr("ZZZZZZZZZZAAA001", 11, 6) 
| eval SourceInstance=case(
    SourceServer=="AAA001", "PROD", 
    SourceServer=="AAA002", "PROD", 
    SourceServer=="BBB001", "UAT", 
    SourceServer=="BBB002", "UAT",
    1=1, "UNKNOWN")

As well as the second one:

cheers, MuS

topic Reference a calculated field within another calculated field in Knowledge Management

Reference a calculated field within another calculated field

Re: Reference a calculated field within another calculated field