This file is taken from the golang text/scanner package so `bufLen` can be set to `maxInputSize`.

ConcatEvaluator joins multiple StepEvaluators.

EvaluatorUnsupportedType is a helper for signaling that an evaluator does not support an Expr type.

GetRangeType returns whether a query is an instant query or range query.

Match extracts and parses multiple matcher groups from a slice of strings.

NewDefaultEvaluator constructs a DefaultEvaluator.

NewDownstreamEngine constructs a *DownstreamEngine.

NewEngine creates a new LogQL Engine.

NewRangeMapper creates a new RangeMapper instance with the given duration as split interval.

ParseShards parses a list of string encoded shards.

ResultIterator coerces a downstream streams result into an iter.EntryIterator.

ResultStepEvaluator coerces a downstream vector or matrix into a StepEvaluator.

Sortable logql contain sort or sort_desc.

parsing evaluation result used in metrics.

expression type used in metrics.

parsing evaluation result used in metrics.

expression type used in metrics.

parsing evaluation result used in metrics.

ConcatLogSelectorExpr is an expr for concatenating multiple LogSelectorExpr.

ConcatSampleExpr is an expr for concatenating multiple SampleExpr Contract: The embedded SampleExprs within a linked list of ConcatSampleExprs must be of the same structure.

DownstreamEngine is an Engine implementation that can split queries into more parallelizable forms via querying the underlying backend shards individually and re-aggregating them.

DownstreamEvaluator is an evaluator which handles shard aware AST nodes.

DownstreamLogSelectorExpr is a LogSelectorExpr which signals downstream computation.

DownstreamSampleExpr is a SampleExpr which signals downstream computation.

Engine is the LogQL engine.

EngineOpts is the list of options to use with the LogQL query engine.

LiteralParams impls Params.

MapperMetrics is the metrics wrapper used in logql mapping (shard and range).

MatrixStepper exposes a promql.Matrix as a StepEvaluator.

Shard aware mock querier.

RangeMapper is used to rewrite LogQL sample expressions into multiple downstream sample expressions with a smaller time range that can be executed using the downstream engine.

rateCounter calculates the per-second rate of values extracted from log lines and treat them like a "counter" metric.

rateLogBytes calculates the per-second rate of log bytes.

rateLogs calculates the per-second rate of log lines or values extracted from log lines.

SelectParams specifies parameters passed to data selections.

Downstreamer is an interface for deferring responsibility for query execution.

Evaluator is an interface for iterating over data at different nodes in the AST.

Limits allow the engine to fetch limits for a given users.

Params details the parameters associated with a loki request.

Querier allows a LogQL expression to fetch an EntryIterator for a set of matchers and filters.

Query is a LogQL query to be executed.

RangeStreamingAgg streaming aggregates sample for each sample.

RangeVectorIterator iterates through a range of samples.

StepEvaluator evaluate a single step of a query.

BatchRangeVectorAggregator aggregates samples for a given range of samples.