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Is there a way to to further extractions from an existing search time extraction using props.conf or transforms.conf?

Explorer

Currently I'm doing an extraction on a log file like so:

[AUDIT_PARSE]
REGEX = \x5b[^\x5d]+\x5d\s+(\w+)\s+(?:\x7b([^\x7d]+)\x7d){0,1}\x2d\s+(.*)
FORMAT = level::$1 log_source::$2 message::$3

One of the extracted fields you see is 'message', which itself has a number of key value pairs. I then want to take the extracted 'message', and parse those pairs.

[AUDIT_MESSAGE_PARSE]
REGEX = \s*(\S+)\s*\x3a\s*((?:[^\x7c\x5d])+?)\s*(?:\x7c|$)
SOURCE_KEY = field:message
FORMAT = $1::$2

One of those key value extractions has another field I want parsed, so I do another one on that field:

[INITIATOR_PARSE]
SOURCE_KEY = field:Initiator
REGEX = ^(.*?)\x2f([^\x40]+)(?:\x40(.+)){0,1}$
FORMAT = SSO_Organization::$1 SSO_User::$2 SSO_Domain::$3

I put them all together with the following in props:

TRANSFORMS-audit = AUDIT_PARSE, AUDIT_MESSAGE_PARSE, INITIATOR_PARSE

Right now AUDITPARSE runs and works, but the remainder does not work. If i remove the SOURCEKEY it 'runs', but it will run in _raw instead of the pre-extracted field. Is this a splunk limitation where I need to do this at Index time, or am I missing something?

Thanks!

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Re: Is there a way to to further extractions from an existing search time extraction using props.conf or transforms.conf?

Explorer

Looks like I've just answered my own question.

The documentation states to use field (for single) or fields (for multiple), but as soon as I removed field and left "SOURCE_KEY = message", it worked as expected perfectly. Now to go deeper and try a JSON parse on one of the extracted fields...

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