topic Re: rex with datamodel in Splunk Dev

rex with datamodel

sarit_s — Sat, 21 Nov 2020 16:18:23 GMT

Hello

i'm wondering if it is possible to use rex command with datamodel without declaring attributes for every rex field i want (i have lots of them )

thanks

Re: rex with datamodel

richgalloway — Sat, 21 Nov 2020 21:18:01 GMT

Please say more about what you want to do. Do you want to use the rex command inside a datamodel or use the rex command on the results returned by a DM?

If the former then you don't need rex. When you add a field to the DM, choose "regular expression" and enter your regex string. The fields you define in the regex (using named capture groups) will become fields in the DM.

If the latter then, yes, you can.

Be aware that more fields in a DM equates to more storage needed to store the results if the DM is accelerated.

Re: rex with datamodel

sarit_s — Sat, 21 Nov 2020 21:21:09 GMT

Hello @richgalloway

thanks for your reply

yes, im referring to the second option.

can you show me an example of how can i do it ?

thanks

Re: rex with datamodel

richgalloway — Mon, 23 Nov 2020 14:29:54 GMT

One you have results from the datamodel, use the rex command on those results the same way you would use it on any other result set. You will not have a _raw field so the rex command must specify a field name

Re: rex with datamodel

sarit_s — Mon, 23 Nov 2020 14:35:04 GMT

yeah, so, i need the rex to run with _raw
for example :

rex field=_raw "TTY=(?<dstuser>.*) ; PWD=(?<url>.*); USER=(?<srcuser>.*) ; COMMAND=(?<status>.*)" | where isnotnull(dstuser)

what replacing the _raw after the datamodel is working ?