Support duration days in LogQL filter

[cyriltovena]

Currently we don't support {app="foo"} | logfmt | length > 5d but I think we should since this is supported in Prometheus and range vector selection.

The change needs to happen here

loki/pkg/logql/lex.go

Line 224 in 5b9f5b9

func tryScanDuration(number string, l *scanner.Scanner) (time.Duration, bool) {

We should try model.Duration from prometheus, and update all tests.

[stale]

Hi! This issue has been automatically marked as stale because it has not had any
activity in the past 30 days.

We use a stalebot among other tools to help manage the state of issues in this project.
A stalebot can be very useful in closing issues in a number of cases; the most common
is closing issues or PRs where the original reporter has not responded.

Stalebots are also emotionless and cruel and can close issues which are still very relevant.

If this issue is important to you, please add a comment to keep it open. More importantly, please add a thumbs-up to the original issue entry.

We regularly sort for closed issues which have a stale label sorted by thumbs up.

We may also:

• Mark issues as revivable if we think it's a valid issue but isn't something we are likely
  to prioritize in the future (the issue will still remain closed).
• Add a keepalive label to silence the stalebot if the issue is very common/popular/important.

We are doing our best to respond, organize, and prioritize all issues but it can be a challenging task,
our sincere apologies if you find yourself at the mercy of the stalebot.

[btaani]

Is someone working on this issue? If not I would like to pick it up

[cyriltovena]

Please !

[periklis]

@cyriltovena let me introduce @btaani is a member of my team. This is here first time with Loki here, but has served enough Elasticsearch battles for us. So welcome @btaani keep going, keep asking us anything.