engine

type ExplainOutputNode struct {
	OperatorName string              `json:"name,omitempty"`
	Children     []ExplainOutputNode `json:"children,omitempty"`
}

type ExplainableQuery interface {
	promql.Query

	Explain() *ExplainOutputNode
	Profile()
}

type Opts struct {
	promql.EngineOpts

	// LogicalOptimizers are optimizers that are run if the value is not nil. If it is nil then the default optimizers are run. Default optimizer list is available in the logicalplan package.
	LogicalOptimizers []logicalplan.Optimizer

	// DisableFallback enables mode where engine returns error if some expression of feature is not yet implemented
	// in the new engine, instead of falling back to prometheus engine.
	DisableFallback bool

	// DebugWriter specifies output for debug (multi-line) information meant for humans debugging the engine.
	// If nil, nothing will be printed.
	// NOTE: Users will not check the errors, debug writing is best effort.
	DebugWriter io.Writer

	// ExtLookbackDelta specifies what time range to use to determine valid previous sample for extended range functions.
	// Defaults to 1 hour if not specified.
	ExtLookbackDelta time.Duration

	// EnableXFunctions enables custom xRate, xIncrease and xDelta functions.
	// This will default to false.
	EnableXFunctions bool

	// FallbackEngine
	Engine v1.QueryEngine
}

type Query struct {
	// contains filtered or unexported fields
}

type QueryType int