Splunk Search

Extract field names from CSV header

JIthesh_Kumar
Explorer

Hi Team,
my CSV file contains a field like bellow (1st line in CSV) How can i create transformation for field extraction 

"State","Location name","Primary Number"

its retrieving a field state and Location

Expected Fields:
State
Location name
Primary Number

Labels (2)
0 Karma
1 Solution

yuanliu
SplunkTrust
SplunkTrust

You needs are probably better served by INDEXED_EXTRACTIONS=csv (index time extraction) or KV_MODE=csv (search time) in sourcetype.  Using regex to handle structured data like CSV is very fragile.

View solution in original post

PickleRick
SplunkTrust
SplunkTrust

If your column order is known and does not change, you can define delimiter-based extractions in props.conf for your sourcetype. But then you must explicitly name the fields and their order. Otherwise the only way to handle such file is using indexed extractions (which has its own drawbacks). Remember that indexed extractions happen on the initial forwarder!

isoutamo
SplunkTrust
SplunkTrust

If you can define which line contains headers and which values, then you can do this with any countable columns. It’s enough to known how many columns you could maximum have.

0 Karma

isoutamo
SplunkTrust
SplunkTrust

Hi

this is doable, but probably it needs some way to recognize which line is header line. And position in file is not that. But as @yuanliu said it's much better to use INDEXED_EXTRACTIONS=csv and then define HEADER_FIELD_LINE_NUMBER if it didn't recognize automatically that header line.

You should put props.conf also on your UF to get this work.

Structured Data Header Extraction and configuration

r. Ismo

yuanliu
SplunkTrust
SplunkTrust

You needs are probably better served by INDEXED_EXTRACTIONS=csv (index time extraction) or KV_MODE=csv (search time) in sourcetype.  Using regex to handle structured data like CSV is very fragile.

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!

How Splunk AI Assistant Is Transforming Investigations: Insights from .conf26

At .conf26 in Denver, I spent much of my time in conversation with Splunk customers about Splunk AI Assistant. ...

Make Your Machine Data AI-Ready in Splunk

Every team is getting ready for AI agents.   Thursday, November 12, 2026  |  11AM  PST / 2PM EST   ...

Splunk Asynchronous Forwarding Explained

Splunk asynchronous forwarding is often misunderstood as simply setting autoLBVolume. That is not quite right. ...