Splunk Search

Field extraction using Field Extractor

gcusello
SplunkTrust
SplunkTrust

Hi at all,
I would extract a field as a part of source field and I know how to do this using rex command

| rex field=source "myregex"

but I'd like to configure this field once and not in all my searches.
I tried putting in field extractor

field=source "myregex"

but there's something wrong!

Anyone has any idea?

Bye.
Giuseppe

0 Karma
1 Solution

TStrauch
Communicator

Hi,

try this. You cannot use the "Field Extractor" for this. Need to Settings --> Fields --> Field extractions --> New

"myregex" in source

looks something like this then.

(?<newfield>.*) in source

regards

View solution in original post

0 Karma

TStrauch
Communicator

Hi,

try this. You cannot use the "Field Extractor" for this. Need to Settings --> Fields --> Field extractions --> New

"myregex" in source

looks something like this then.

(?<newfield>.*) in source

regards

0 Karma

gcusello
SplunkTrust
SplunkTrust

Perfect: without double quotes!
Thank you.
Bye.
Giuseppe

0 Karma

richgalloway
SplunkTrust
SplunkTrust

The field extractor looks in the entire event. It's equivalent to rex field=_raw "myregex". You'll have to adjust your 'myregex' string to extract the desired field from the whole event.

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

gcusello
SplunkTrust
SplunkTrust

yes I know, but source field isn't in _row.
Bye.
Giuseppe

0 Karma
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!

Your Feedback. Our Roadmap. Visit the PX Feedback Booth at .conf26

You use Splunk every day, come and help shape what's next.  Save Your Seat: Product-Focused Sessions at ...

Agentic SOC Triage: Investigating Splunk ES Notables with MCP Server and a Local LLM

The Problem: Too Many Alerts, Too Little Context Security operations teams running Splunk Enterprise Security ...

Painting a Clearer Picture: Creating Cross-Domain Visibility with AI Canvas

Watch Now Painting a Clearer Picture: Creating Cross-Domain Visibility with AI Canvas     Do you ever feel ...