Like Prometheus, but for logs.

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Michel Hollands 478510a1bb Fix Grouping String function and usage so it prints "without ()" (#9515) ... **What this PR does / why we need it**: The changes rangemapper made to LogQL expressions created invalid LogQL. It added a `without` clause instead of `without ()`. This PR changes the String function of the Grouping struct. This is then used in the rangemapper. This caused the following panic: ``` panic: error cloning query: count without (rate({namespace="apps"}[15s])): parse error at line 1, col 16: syntax error: unexpected RATE, expecting IDENTIFIER or ) ``` **Checklist** - [x] Reviewed the [`CONTRIBUTING.md`](https://github.com/grafana/loki/blob/main/CONTRIBUTING.md) guide (**required**) - [ ] Documentation added - [x] Tests updated - [x] `CHANGELOG.md` updated - [ ] Changes that require user attention or interaction to upgrade are documented in `docs/sources/upgrading/_index.md` - [ ] For Helm chart changes bump the Helm chart version in `production/helm/loki/Chart.yaml` and update `production/helm/loki/CHANGELOG.md` and `production/helm/loki/README.md`. [Example PR](d10549e3ec) --------- Signed-off-by: Michel Hollands <michel.hollands@grafana.com>		2 years ago
..
log	Fix case insensitive label filter (#9404)	2 years ago
syntax	Fix Grouping String function and usage so it prints "without ()" (#9515)	2 years ago
vector	Update Prometheus dependency (#9205)	2 years ago
blocker.go	Querier: block query by hash (#8953)	2 years ago
blocker_test.go	Querier: block query by hash (#8953)	2 years ago
downstream.go	Eager stream merge (#8968)	2 years ago
downstream_test.go	Update Prometheus dependency (#9205)	2 years ago
engine.go	Add query info to query.Exec span (#9320)	2 years ago
engine_test.go	Update Prometheus dependency (#9205)	2 years ago
evaluator.go	Update Prometheus dependency (#9205)	2 years ago
evaluator_test.go	Update Prometheus dependency (#9205)	2 years ago
limits.go	Loki: Add a limit for the [range] value on range queries (#8343)	2 years ago
mapper_metrics.go	query_frontend_shard_factor uses exponential buckets (#6689)	3 years ago
matchers.go	Refactor LogQL syntax into its own package (#5539)	3 years ago
matchers_test.go	Label selector optimizations (#8763)	2 years ago
matrix.go	Update Prometheus dependency (#9205)	2 years ago
matrix_test.go	Update Prometheus dependency (#9205)	2 years ago
metrics.go	Rename usagestats to analytics (#9212)	2 years ago
metrics_test.go	Loki: log all trace ID's but include `sampled=true` when the trace is logged (#9039)	2 years ago
optimize.go	Add logfmt selective label extraction (#6675)	2 years ago
optimize_test.go	fix panics when cloning a special query (#8531)	2 years ago
range_vector.go	Update Prometheus dependency (#9205)	2 years ago
range_vector_test.go	Update Prometheus dependency (#9205)	2 years ago
rangemapper.go	Fix Grouping String function and usage so it prints "without ()" (#9515)	2 years ago
rangemapper_test.go	Fix Grouping String function and usage so it prints "without ()" (#9515)	2 years ago
shardmapper.go	Loki: Add a limit for the [range] value on range queries (#8343)	2 years ago
shardmapper_test.go	Max bytes read limit (#8670)	2 years ago
step_evaluator.go	fixes a badly referenced variable name in StepEvaluator code (#3996)	4 years ago
test_utils.go	Revert "Augment statistics.." PR 9400. (#9430)	2 years ago
vector.go	Update Prometheus dependency (#9205)	2 years ago