Splunk Search

EVAL with Sub search

Reddy_dash
Engager

Hi Friends,

If I execute below highlighted query I am getting the result where when I supply the result as search it is not returning any result

index=* env=X1 SourceName=*api* [search index=* env=X1 SourceName=*api* "Transaction" | eval "TraceID"=substr(Message,85,36) | table "TraceID"]

Please help on this.

Thanks

Labels (1)
0 Karma
1 Solution

richgalloway
SplunkTrust
SplunkTrust

If you run the subsearch with | format appended to it then you'll see what is added on to the main search.  That has to make sense with your data to get resuits.  I suspect your subsearch is producing a result like this:

(TraceID="foo" OR TraceID="bar" OR TraceID="baz")

If the events do not contain a field called "TraceID" then no results will be found.

Try this subsearch, instead.

search index=* env=X1 SourceName=*api* "Transaction" | eval "TraceID"=substr(Message,85,36) | return 1000 $TraceID
---
If this reply helps you, Karma would be appreciated.

View solution in original post

richgalloway
SplunkTrust
SplunkTrust

If you run the subsearch with | format appended to it then you'll see what is added on to the main search.  That has to make sense with your data to get resuits.  I suspect your subsearch is producing a result like this:

(TraceID="foo" OR TraceID="bar" OR TraceID="baz")

If the events do not contain a field called "TraceID" then no results will be found.

Try this subsearch, instead.

search index=* env=X1 SourceName=*api* "Transaction" | eval "TraceID"=substr(Message,85,36) | return 1000 $TraceID
---
If this reply helps you, Karma would be appreciated.
Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

[Puzzles] Solve, Learn, Repeat: Tiling

This puzzle (first published here) is based on finding groups of tessellated tiles (inspired by floor tiles I ...

SOK it to Me: Top 3 Benefits of Using Splunk Operator on Kubernetes that’ll Make ...

    Thursday, July 9, 2026  |  11:00AM–12:00PM PDT Duration: 1 hour (includes Q&A) Managing can feel like a ...

Upgrade Prep for 10.4, Network Observability Deep Dives, and More from Splunk Lantern

Splunk Lantern is Splunk’s customer success center that provides practical guidance from Splunk experts on key ...