Regex to find if a field exists

Hi All,

I am trying to write a pipeline rule in which I’ve to check if a field exists with a particular regex pattern. Is there any way I can do it? Usually, we use has_field() if when we know the exact key. In this case, we don’t. For e.g. I’ve to filter all the messages which have one of the following fields:

I need to write something like:
rule “filesystem_new”

Please let me know how can this be done.

this is not possible.

You might want to create a future request over in github for that:

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