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Ed Welch edc6b0bff7 Loki: Add a limit for the [range] value on range queries (#8343) ... Signed-off-by: Edward Welch <edward.welch@grafana.com> **What this PR does / why we need it**: Loki does not currently split queries by time to a value smaller than what's in the [range] of a range query. Example ``` sum(rate({job="foo"}[2d])) ``` Imagine now this query being executed over a longer window of a few days with a step of something like 30m. Every step evaluation would query the last [2d] of data. There are use cases where this is desired, specifically if you force the step to match the value in the range, however what is more common is someone accidentally uses `[$__range]` in here instead of `[$__interval]` within Grafana and then sets the query time selector to a large value like 7 days. This PR adds a limit which will fail queries that set the [range] value higher than the configured limit. It's disabled by default. In the future it may be possible for Loki to perform splits within the [range] and remove the need for this limit, but until then this can be an important safeguard in clusters with a lot of data. **Which issue(s) this PR fixes**: Fixes #8746 **Special notes for your reviewer**: **Checklist** - [ ] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [ ] Tests updated - [ ] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` --------- Signed-off-by: Edward Welch <edward.welch@grafana.com> Co-authored-by: Karsten Jeschkies <karsten.jeschkies@grafana.com> Co-authored-by: Vladyslav Diachenko <82767850+vlad-diachenko@users.noreply.github.com>		3 years ago
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ast.go	Loki: Add a limit for the [range] value on range queries (#8343)	3 years ago
ast_test.go	Automatically Reorder Pipeline Filters (#8914)	3 years ago
expr.y	chore: Cleanup label extraction expression (#8596)	3 years ago
expr.y.go	chore: Cleanup label extraction expression (#8596)	3 years ago
extractor.go	LogQL: [optimization] syntax: Replace "panic" in "/pkg/logql/syntax" with "error" (#7208)	3 years ago
extractor_test.go	…
fuzz.go	Build: update package for fuzzer after refactoring (#5776)	4 years ago
fuzz_test.go	Replace deprecated `io/ioutil` with `io` and `os` packages (#7212)	3 years ago
lex.go	feat(logql): Support drop labels in logql pipeline (#7975)	3 years ago
lex_test.go	Add logfmt selective label extraction (#6675)	3 years ago
parser.go	Fix parsing of vector expression (#8448)	3 years ago
parser_test.go	Label selector optimizations (#8763)	3 years ago
prettier.go	Add logfmt selective label extraction (#6675)	3 years ago
prettier_test.go	feat(logql): Supporting prettifying LogQL expressions (#7906)	3 years ago
walk.go	…
walk_test.go	fix panics when cloning a special query (#8531)	3 years ago