How to write a rex for an alphanumeric field extraction

[av_]

Need help with the extraction of an alpha numeric field. E.G. : ea37c31d-f4df-48ab-b0b7-276ade5c5312

[ITWhisperer]

Use a character class - it looks like this is hexadecimal with some hyphens thrown in so try

[a-f0-9-]

[av_]

Thanks @ITWhisperer . 
[^\"] worked for me.

[isoutamo]

Hi

as that probably seems to be UUID string, you could make more strict regex to match it like

[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}

Time by time your data could contains some data which could match e.g. [^\"]+ but it's still e.g. UUID.

Also those regex use different amount of resources. With only some events this is usually not an issue, but if/when you have e.g. billions of events then even 1ms start to make difference. You could look that e.g. with regex101.com. 

This happened quite often e.g. with SSN + bank accounts etc. So look your data and use expression which match best for your data!

r. Ismo 

[ITWhisperer]

Cool - you obviously have more (unshared) knowledge about your events, which I could not easily have guessed at!