Looks like I was not completely true. It's more complicated. But there is a way: From transforms.conf.spec file: NOTE: For KV Store lookups, a setting of 'case_sensitive_match=false' is honored only when the data in the KV Store lookup table is entirely in lower case. The input data can be in any case. Context: case_sensitive_match = <boolean>
* If set to true, Splunk software performs case sensitive matching for all
fields in a lookup table.
* If set to false, Splunk software performs case insensitive matching for all
fields in a lookup table.
* NOTE: For KV Store lookups, a setting of 'case_sensitive_match=false' is
honored only when the data in the KV Store lookup table is entirely in lower
case. The input data can be in any case.
* For case sensitive field matching in reverse lookups see
reverse_lookup_honor_case_sensitive_match.
* Default: true
... View more