chore: add range query impl for promql

pkg/errors/code.go

@@ -14,6 +14,8 @@ var (
 	CodeAlreadyExists         = Code{"already_exists"}
 	CodeUnauthenticated       = Code{"unauthenticated"}
 	CodeForbidden             = Code{"forbidden"}
+	CodeCanceled              = Code{"canceled"}
+	CodeTimeout               = Code{"timeout"}
 )
 
 var (

pkg/errors/type.go

@@ -9,6 +9,8 @@ var (
 	TypeAlreadyExists        = typ{"already-exists"}
 	TypeUnauthenticated      = typ{"unauthenticated"}
 	TypeForbidden            = typ{"forbidden"}
+	TypeCanceled             = typ{"canceled"}
+	TypeTimeout              = typ{"timeout"}
 )
 
 // Defines custom error types

pkg/http/render/render.go

@@ -7,6 +7,12 @@ import (
 	jsoniter "github.com/json-iterator/go"
 )
 
+const (
+	// Non-standard status code (originally introduced by nginx) for the case when a client closes
+	// the connection while the server is still processing the request.
+	statusClientClosedConnection = 499
+)
+
 var json = jsoniter.ConfigCompatibleWithStandardLibrary
 
 type response struct {
@@ -60,6 +66,10 @@ func Error(rw http.ResponseWriter, cause error) {
 		httpCode = http.StatusNotImplemented
 	case errors.TypeForbidden:
 		httpCode = http.StatusForbidden
+	case errors.TypeCanceled:
+		httpCode = statusClientClosedConnection
+	case errors.TypeTimeout:
+		httpCode = http.StatusServiceUnavailable
 	}
 
 	rea := make([]responseerroradditional, len(a))

pkg/querier/promql_query.go

@@ -2,9 +2,14 @@ package querier
 
 import (
 	"context"
+	"time"
 
+	"github.com/SigNoz/signoz/pkg/errors"
 	"github.com/SigNoz/signoz/pkg/prometheus"
+	"github.com/SigNoz/signoz/pkg/querybuilder"
 	qbv5 "github.com/SigNoz/signoz/pkg/types/querybuildertypes/querybuildertypesv5"
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
+	"github.com/prometheus/prometheus/promql"
 )
 
 type promqlQuery struct {
@@ -35,7 +40,90 @@ func (q *promqlQuery) Window() (uint64, uint64) {
 }
 
 func (q *promqlQuery) Execute(ctx context.Context) (*qbv5.Result, error) {
-	// TODO: Implement this
+
-	//nolint:nilnil
+	start := int64(querybuilder.ToNanoSecs(q.tr.From))
-	return nil, nil
+	end := int64(querybuilder.ToNanoSecs(q.tr.To))
+
+	qry, err := q.promEngine.Engine().NewRangeQuery(
+		ctx,
+		q.promEngine.Storage(),
+		nil,
+		q.query.Query,
+		time.Unix(0, start),
+		time.Unix(0, end),
+		q.query.Step.Duration,
+	)
+
+	if err != nil {
+		return nil, errors.NewInvalidInputf(errors.CodeInvalidInput, "invalid promql query %q", q.query.Query)
+	}
+
+	res := qry.Exec(ctx)
+	if res.Err != nil {
+		var eqc promql.ErrQueryCanceled
+		var eqt promql.ErrQueryTimeout
+		var es promql.ErrStorage
+		switch {
+		case errors.As(res.Err, &eqc):
+			return nil, errors.Newf(errors.TypeCanceled, errors.CodeCanceled, "query canceled")
+		case errors.As(res.Err, &eqt):
+			return nil, errors.Newf(errors.TypeTimeout, errors.CodeTimeout, "query timeout")
+		case errors.As(res.Err, &es):
+			return nil, errors.Newf(errors.TypeInternal, errors.CodeInternal, "query execution error: %v", res.Err)
+		}
+
+		if errors.Is(res.Err, context.Canceled) {
+			return nil, errors.Newf(errors.TypeCanceled, errors.CodeCanceled, "query canceled")
+		}
+
+		return nil, errors.Newf(errors.TypeInternal, errors.CodeInternal, "query execution error: %v", res.Err)
+	}
+
+	defer qry.Close()
+
+	matrix, promErr := res.Matrix()
+	if promErr != nil {
+		return nil, errors.WrapInternalf(promErr, errors.CodeInternal, "error getting matrix from promql query %q", q.query.Query)
+	}
+
+	var series []*qbv5.TimeSeries
+	for _, v := range matrix {
+		var s qbv5.TimeSeries
+		lbls := make([]*qbv5.Label, 0, len(v.Metric))
+		for k, v := range v.Metric.Copy().Map() {
+			lbls = append(lbls, &qbv5.Label{
+				Key:   telemetrytypes.TelemetryFieldKey{Name: k},
+				Value: v,
+			})
+		}
+
+		s.Labels = lbls
+
+		for idx := range v.Floats {
+			p := v.Floats[idx]
+			s.Values = append(s.Values, &qbv5.TimeSeriesValue{
+				Timestamp: p.T,
+				Value:     p.F,
+			})
+		}
+		series = append(series, &s)
+	}
+
+	warnings, _ := res.Warnings.AsStrings(q.query.Query, 10, 0)
+
+	return &qbv5.Result{
+		Type: qbv5.RequestTypeTimeSeries,
+		Value: []*qbv5.TimeSeriesData{
+			{
+				QueryName: q.query.Name,
+				Aggregations: []*qbv5.AggregationBucket{
+					{
+						Series: series,
+					},
+				},
+			},
+		},
+		Warnings: warnings,
+		// TODO: map promql stats?
+	}, nil
 }

pkg/types/querybuildertypes/querybuildertypesv5/prom_query.go

@@ -7,4 +7,8 @@ type PromQuery struct {
 	Query string `json:"query"`
 	// disabled if true, the query will not be executed
 	Disabled bool `json:"disabled"`
+	// step size for the query
+	Step Step `json:"step"`
+	// stats if true, the query will return stats
+	Stats bool `json:"stats"`
 }