How to allow special characters in the header for uploaded CSV data?

[chandresh_gurba]

I uploaded CSV data which contains some special characters in headers and values, but after parsing, all special characters were removed from the header.
I want to support all characters in the header. I also tried several Regex patterns in "FIELD_HEADER_REGEX" and "Pattern for prefixed header line", but not able to get proper results.

[richgalloway · Accepted solution]

CSV headers become Splunk fields so they are limited to the characters allowed in field names. Valid characters for field names are a-z, A-Z, 0-9, or _ . Field names cannot start with a digit or underscore.