Re: [prometheus-users] Wildcard in PromQL "5.+" vs "5\\d{2}"
Hi Jason,
Prometheus uses the RE2 regular expression dialect, you can find the
documentation about that here: https://github.com/google/re2/wiki/Syntax
The double backslash ("\\") is just to escape the one backslash in the
Prometheus string. So the actual regex is just "5\\d{2}". You can remove
the escaping by using backticks as quotes, which do not interpret escape
sequences: `5\d{2}`
Kind regards,
Julius
On Tue, Oct 3, 2023 at 12:03 PM 'Jason' via Prometheus Users <
prometheus-users@googlegroups.com> wrote:
> On 03.10.2023 10:55, Stuart Clark wrote:
> > In reality both will do the same thing, although the second is
> > technically more correct.
> >
> > The first regular expression is matching "5" followed by 1 or more other
> > characters, while the second is matching "5" followed by exactly 2
> > numbers. So the first one would also match "50" or "5frogs" which aren't
> > valid status codes, but in reality your application would have to be
> > having serious problems to be setting those values anyway.
>
> Thanks Stuart
>
> Is there any docs about this type of regex? I didn't found "\\d" in
> official docs.
>
> How is this regex called?
>
> cheers
> Jason
>
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> .
>
--
Julius Volz
PromLabs - promlabs.com
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Re: [prometheus-users] Wildcard in PromQL "5.+" vs "5\\d{2}"
On 03.10.2023 10:55, Stuart Clark wrote: In reality both will do the same thing, although the second is technically more correct. The first regular expression is matching "5" followed by 1 or more other characters, while the second is matching "5" followed by exactly 2 numbers. So the first one would also match "50" or "5frogs" which aren't valid status codes, but in reality your application would have to be having serious problems to be setting those values anyway. Thanks Stuart Is there any docs about this type of regex? I didn't found "\\d" in official docs. How is this regex called? cheers Jason -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to prometheus-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/988b8358-d588-4120-8768-d8c7f29fe8f5%407748229.xyz. OpenPGP_0x0D0C34B5DF58FE9D.asc Description: OpenPGP public key OpenPGP_signature.asc Description: OpenPGP digital signature
Re: [prometheus-users] Wildcard in PromQL "5.+" vs "5\\d{2}"
On 2023-10-03 09:09, 'Jason' via Prometheus Users wrote:
Hi
I will write my query like this (with * wildcad)
sum(http_requests_total{status_code=~"5.+"})
In internet I found this syntax \\d{2}
sum(http_requests_total{status_code=~"5\\d{2}"})
What is this? Where to find more info?
Why I should use the 2nd query and not the first?
In reality both will do the same thing, although the second is
technically more correct.
The first regular expression is matching "5" followed by 1 or more other
characters, while the second is matching "5" followed by exactly 2
numbers. So the first one would also match "50" or "5frogs" which aren't
valid status codes, but in reality your application would have to be
having serious problems to be setting those values anyway.
--
Stuart Clark
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[prometheus-users] Wildcard in PromQL "5.+" vs "5\\d{2}"
Hi
I will write my query like this (with * wildcad)
sum(http_requests_total{status_code=~"5.+"})
In internet I found this syntax \\d{2}
sum(http_requests_total{status_code=~"5\\d{2}"})
What is this? Where to find more info?
Why I should use the 2nd query and not the first?
cheers
Jason
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