fix: remove overlapping time from duration aggregation

* feat(global): add mcp_url to global config

Adds an optional mcp_url field to the global config so the frontend can
gate the MCP settings page on its presence. When unset the API returns
"mcp_url": null (pointer + nullable:"true"); when set it emits the
parsed URL as a string.

* feat(global): surface mcp_url in frontend types

Adds mcp_url to the manual GlobalConfigData type and refreshes the
generated OpenAPI client so consumers can read the new field.

* docs(global): use <unset> placeholder for mcp_url example

Matches the style of external_url and ingestion_url above it.

* style(global): separate mcp_url prep from return in GetConfig

Adds a blank line between the nullable-conversion block and the return
statement so the two logical phases read as distinct blocks.

* feat(global): mark endpoint fields as required in the API schema

The backend always emits external_url, ingestion_url and mcp_url on
GET /api/v1/global/config (mcp_url as literal null when unset), so the
JSON keys are always present. Add required:"true" to all three and
regenerate the OpenAPI + frontend client so consumers get non-optional
types.

* revert(global): drop mcp_url from legacy GlobalConfigData type

The legacy hand-written type for the non-Orval getGlobalConfig client
should be left alone; consumers that need mcp_url go through the
generated Orval client.

conf/example.yaml

@@ -11,6 +11,8 @@ global:
   external_url: <unset>
   # the url where the SigNoz backend receives telemetry data (traces, metrics, logs) from instrumented applications.
   ingestion_url: <unset>
+  # the url of the SigNoz MCP server. when unset, the MCP settings page is hidden in the frontend.
+  # mcp_url: <unset>
 
 ##################### Version #####################
 version:

docs/api/openapi.yml

@@ -2369,6 +2369,13 @@ components:
           $ref: '#/components/schemas/GlobaltypesIdentNConfig'
         ingestion_url:
           type: string
+        mcp_url:
+          nullable: true
+          type: string
+      required:
+      - external_url
+      - ingestion_url
+      - mcp_url
       type: object
     GlobaltypesIdentNConfig:
       properties:
@@ -4596,6 +4603,11 @@ components:
       type: object
     TracedetailtypesGettableWaterfallTrace:
       properties:
+        aggregations:
+          items:
+            $ref: '#/components/schemas/TracedetailtypesSpanAggregationResult'
+          nullable: true
+          type: array
         endTimestampMillis:
           minimum: 0
           type: integer
@@ -4635,6 +4647,11 @@ components:
       type: object
     TracedetailtypesPostableWaterfall:
       properties:
+        aggregations:
+          items:
+            $ref: '#/components/schemas/TracedetailtypesSpanAggregation'
+          nullable: true
+          type: array
         limit:
           minimum: 0
           type: integer
@@ -4646,6 +4663,32 @@ components:
           nullable: true
           type: array
       type: object
+    TracedetailtypesSpanAggregation:
+      properties:
+        aggregation:
+          $ref: '#/components/schemas/TracedetailtypesSpanAggregationType'
+        field:
+          $ref: '#/components/schemas/TelemetrytypesTelemetryFieldKey'
+      type: object
+    TracedetailtypesSpanAggregationResult:
+      properties:
+        aggregation:
+          $ref: '#/components/schemas/TracedetailtypesSpanAggregationType'
+        field:
+          $ref: '#/components/schemas/TelemetrytypesTelemetryFieldKey'
+        value:
+          additionalProperties:
+            minimum: 0
+            type: integer
+          nullable: true
+          type: object
+      type: object
+    TracedetailtypesSpanAggregationType:
+      enum:
+      - spanCount
+      - executionTimePercentage
+      - duration
+      type: string
     TracedetailtypesWaterfallSpan:
       properties:
         attributes:

frontend/src/api/generated/services/sigNoz.schemas.ts

@@ -3125,12 +3125,17 @@ export interface GlobaltypesConfigDTO {
 	/**
 	 * @type string
 	 */
-	external_url?: string;
+	external_url: string;
 	identN?: GlobaltypesIdentNConfigDTO;
 	/**
 	 * @type string
 	 */
-	ingestion_url?: string;
+	ingestion_url: string;
+	/**
+	 * @type string
+	 * @nullable true
+	 */
+	mcp_url: string | null;
 }
 
 export interface GlobaltypesIdentNConfigDTO {
@@ -5588,6 +5593,11 @@ export type TracedetailtypesGettableWaterfallTraceDTOServiceNameToTotalDurationM
 	{ [key: string]: number } | null;
 
 export interface TracedetailtypesGettableWaterfallTraceDTO {
+	/**
+	 * @type array
+	 * @nullable true
+	 */
+	aggregations?: TracedetailtypesSpanAggregationResultDTO[] | null;
 	/**
 	 * @type integer
 	 * @minimum 0
@@ -5642,6 +5652,11 @@ export interface TracedetailtypesGettableWaterfallTraceDTO {
 }
 
 export interface TracedetailtypesPostableWaterfallDTO {
+	/**
+	 * @type array
+	 * @nullable true
+	 */
+	aggregations?: TracedetailtypesSpanAggregationDTO[] | null;
 	/**
 	 * @type integer
 	 * @minimum 0
@@ -5658,6 +5673,33 @@ export interface TracedetailtypesPostableWaterfallDTO {
 	uncollapsedSpans?: string[] | null;
 }
 
+export interface TracedetailtypesSpanAggregationDTO {
+	aggregation?: TracedetailtypesSpanAggregationTypeDTO;
+	field?: TelemetrytypesTelemetryFieldKeyDTO;
+}
+
+/**
+ * @nullable
+ */
+export type TracedetailtypesSpanAggregationResultDTOValue = {
+	[key: string]: number;
+} | null;
+
+export interface TracedetailtypesSpanAggregationResultDTO {
+	aggregation?: TracedetailtypesSpanAggregationTypeDTO;
+	field?: TelemetrytypesTelemetryFieldKeyDTO;
+	/**
+	 * @type object
+	 * @nullable true
+	 */
+	value?: TracedetailtypesSpanAggregationResultDTOValue;
+}
+
+export enum TracedetailtypesSpanAggregationTypeDTO {
+	spanCount = 'spanCount',
+	executionTimePercentage = 'executionTimePercentage',
+	duration = 'duration',
+}
 /**
  * @nullable
  */

pkg/global/config.go

@@ -17,6 +17,7 @@ var (
 type Config struct {
 	ExternalURL  *url.URL `mapstructure:"external_url"`
 	IngestionURL *url.URL `mapstructure:"ingestion_url"`
+	MCPURL       *url.URL `mapstructure:"mcp_url"`
 }
 
 func NewConfigFactory() factory.ConfigFactory {

pkg/global/signozglobal/provider.go

@@ -31,8 +31,14 @@ func newProvider(_ context.Context, providerSettings factory.ProviderSettings, c
 }
 
 func (provider *provider) GetConfig(context.Context) *globaltypes.Config {
+	var mcpURL *string
+	if provider.config.MCPURL != nil {
+		s := provider.config.MCPURL.String()
+		mcpURL = &s
+	}
+
 	return globaltypes.NewConfig(
-		globaltypes.NewEndpoint(provider.config.ExternalURL.String(), provider.config.IngestionURL.String()),
+		globaltypes.NewEndpoint(provider.config.ExternalURL.String(), provider.config.IngestionURL.String(), mcpURL),
 		globaltypes.NewIdentNConfig(
 			globaltypes.TokenizerConfig{Enabled: provider.identNConfig.Tokenizer.Enabled},
 			globaltypes.APIKeyConfig{Enabled: provider.identNConfig.APIKeyConfig.Enabled},

pkg/modules/tracedetail/impltracedetail/handler.go

@@ -25,6 +25,11 @@ func (h *handler) GetWaterfall(rw http.ResponseWriter, r *http.Request) {
 		return
 	}
 
+	if err := req.Validate(); err != nil {
+		render.Error(rw, err)
+		return
+	}
+
 	result, err := h.module.GetWaterfall(r.Context(), mux.Vars(r)["traceID"], req)
 	if err != nil {
 		render.Error(rw, err)

pkg/modules/tracedetail/impltracedetail/module.go

@@ -37,7 +37,12 @@ func (m *module) GetWaterfall(ctx context.Context, traceID string, req *tracedet
 		m.config.Waterfall.MaxDepthToAutoExpand,
 	)
 
-	return tracedetailtypes.NewGettableWaterfallTrace(waterfallTrace, selectedSpans, uncollapsedSpans, selectedAllSpans), nil
+	aggregationResults := make([]tracedetailtypes.SpanAggregationResult, 0, len(req.Aggregations))
+	for _, a := range req.Aggregations {
+		aggregationResults = append(aggregationResults, waterfallTrace.GetSpanAggregation(a.Aggregation, a.Field))
+	}
+
+	return tracedetailtypes.NewGettableWaterfallTrace(waterfallTrace, selectedSpans, uncollapsedSpans, selectedAllSpans, aggregationResults), nil
 }
 
 // getTraceData returns the waterfall cache for the given traceID with fallback on DB.

pkg/modules/tracedetail/impltracedetail/waterfall_test.go

@@ -260,7 +260,7 @@ func TestGetSelectedSpans_MultipleRoots(t *testing.T) {
 	trace := getWaterfallTrace([]*tracedetailtypes.WaterfallSpan{root1, root2}, spanMap)
 	spans, _ := trace.GetSelectedSpans([]string{"root1", "root2"}, "root1", 500, 5)
 
-	traceRespnose := tracedetailtypes.NewGettableWaterfallTrace(trace, spans, nil, false)
+	traceRespnose := tracedetailtypes.NewGettableWaterfallTrace(trace, spans, nil, false, nil)
 
 	assert.Equal(t, []string{"root1", "child1", "root2", "child2"}, spanIDs(spans), "root1 subtree must precede root2 subtree")
 	assert.Equal(t, "svc-a", traceRespnose.RootServiceName, "metadata comes from first root")
@@ -567,7 +567,7 @@ func TestGetAllSpans(t *testing.T) {
 	)
 	trace := getWaterfallTrace([]*tracedetailtypes.WaterfallSpan{root}, nil)
 	spans := trace.GetAllSpans()
-	traceResponse := tracedetailtypes.NewGettableWaterfallTrace(trace, spans, nil, true)
+	traceResponse := tracedetailtypes.NewGettableWaterfallTrace(trace, spans, nil, true, nil)
 	assert.ElementsMatch(t, spanIDs(spans), []string{"root", "childA", "grandchildA", "leafA", "childB", "grandchildB", "leafB"})
 	assert.Equal(t, "svc", traceResponse.RootServiceName)
 	assert.Equal(t, "root-op", traceResponse.RootServiceEntryPoint)

pkg/querier/builder_query.go

@@ -265,15 +265,6 @@ func (q *builderQuery[T]) executeWithContext(ctx context.Context, query string,
 		return nil, err
 	}
 
-	// TODO: This should move to readAsRaw function in consume.go but for now we are keeping it here since it's only relevant for traces
-	if q.spec.Signal == telemetrytypes.SignalTraces {
-		if raw, ok := payload.(*qbtypes.RawData); ok {
-			for _, rr := range raw.Rows {
-				mergeSpanAttributeColumns(rr.Data)
-			}
-		}
-	}
-
 	return &qbtypes.Result{
 		Type:  q.kind,
 		Value: payload,

pkg/querier/consume.go

@@ -431,48 +431,6 @@ func readAsRaw(rows driver.Rows, queryName string) (*qbtypes.RawData, error) {
 	}, nil
 }
 
-// mergeSpanAttributeColumns merges the typed ClickHouse span attribute columns
-// (attributes_string, attributes_number, attributes_bool, resources_string) into
-// unified "attributes" and "resource_attributes" keys, removing the raw columns.
-// It is a no-op if none of the raw columns are present.
-func mergeSpanAttributeColumns(data map[string]any) {
-	attrStr, hasStr := data["attributes_string"]
-	attrNum, hasNum := data["attributes_number"]
-	attrBool, hasBool := data["attributes_bool"]
-	// todo(nitya): move to resource json
-	resStr, hasRes := data["resources_string"]
-
-	if !hasStr && !hasNum && !hasBool && !hasRes {
-		return
-	}
-
-	attributes := make(map[string]any)
-	if m, ok := attrStr.(map[string]string); ok {
-		for k, v := range m {
-			attributes[k] = v
-		}
-	}
-	if m, ok := attrNum.(map[string]float64); ok {
-		for k, v := range m {
-			attributes[k] = v
-		}
-	}
-	if m, ok := attrBool.(map[string]bool); ok {
-		for k, v := range m {
-			attributes[k] = v
-		}
-	}
-	delete(data, "attributes_string")
-	delete(data, "attributes_number")
-	delete(data, "attributes_bool")
-	data["attributes"] = attributes
-
-	if m, ok := resStr.(map[string]string); ok {
-		data["resource"] = m
-	}
-	delete(data, "resources_string")
-}
-
 // numericAsFloat converts numeric types to float64 efficiently.
 func numericAsFloat(v any) float64 {
 	switch x := v.(type) {

pkg/querier/trace_operator_query.go

@@ -85,13 +85,6 @@ func (q *traceOperatorQuery) executeWithContext(ctx context.Context, query strin
 		return nil, err
 	}
 
-	// TODO: This should move to readAsRaw function in consume.go but for now we can keep it here since it's only relevant for traces
-	if raw, ok := payload.(*qbtypes.RawData); ok {
-		for _, rr := range raw.Rows {
-			mergeSpanAttributeColumns(rr.Data)
-		}
-	}
-
 	return &qbtypes.Result{
 		Type:  q.kind,
 		Value: payload,

pkg/query-service/app/clickhouseReader/reader.go

@@ -1154,7 +1154,13 @@ func (r *ClickHouseReader) GetFlamegraphSpansForTrace(ctx context.Context, orgID
 	if err != nil {
 		r.logger.Info("cache miss for getFlamegraphSpansForTrace", "traceID", traceID)
 
-		searchScanResponses, err := r.GetSpansForTrace(ctx, traceID, fmt.Sprintf("SELECT timestamp, duration_nano, span_id, trace_id, has_error,links as references, resource_string_service$$name, name, events FROM %s.%s WHERE trace_id=$1 and ts_bucket_start>=$2 and ts_bucket_start<=$3 ORDER BY timestamp ASC, name ASC", r.TraceDB, r.traceTableName))
+		selectCols := "timestamp, duration_nano, span_id, trace_id, has_error, links as references, resource_string_service$$name, name, events"
+		if len(req.RequiredFields) > 0 {
+			selectCols += ", attributes_string, attributes_number, attributes_bool, resources_string"
+		}
+		flamegraphQuery := fmt.Sprintf("SELECT %s FROM %s.%s WHERE trace_id=$1 and ts_bucket_start>=$2 and ts_bucket_start<=$3 ORDER BY timestamp ASC, name ASC", selectCols, r.TraceDB, r.traceTableName)
+
+		searchScanResponses, err := r.GetSpansForTrace(ctx, traceID, flamegraphQuery)
 		if err != nil {
 			return nil, err
 		}
@@ -1193,6 +1199,10 @@ func (r *ClickHouseReader) GetFlamegraphSpansForTrace(ctx context.Context, orgID
 				Children:     make([]*model.FlamegraphSpan, 0),
 			}
 
+			if len(req.RequiredFields) > 0 {
+				jsonItem.SetRequestedFields(item, req.RequiredFields)
+			}
+
 			// metadata calculation
 			startTimeUnixNano := uint64(item.TimeUnixNano.UnixNano())
 			if startTime == 0 || startTimeUnixNano < startTime {

pkg/query-service/model/queryParams.go

@@ -2,6 +2,8 @@ package model
 
 import (
 	"time"
+
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
 )
 
 type InstantQueryMetricsParams struct {
@@ -337,10 +339,11 @@ type GetWaterfallSpansForTraceWithMetadataParams struct {
 }
 
 type GetFlamegraphSpansForTraceParams struct {
-	SelectedSpanID  string `json:"selectedSpanId"`
-	Limit           uint   `json:"limit"`
-	BoundaryStartTS uint64 `json:"boundaryStartTsMilli"`
-	BoundaryEndTS   uint64 `json:"boundarEndTsMilli"`
+	SelectedSpanID  string                             `json:"selectedSpanId"`
+	Limit           uint                               `json:"limit"`
+	BoundaryStartTS uint64                             `json:"boundaryStartTsMilli"`
+	BoundaryEndTS   uint64                             `json:"boundarEndTsMilli"`
+	RequiredFields  []telemetrytypes.TelemetryFieldKey `json:"requiredFields"`
 }
 
 type SpanFilterParams struct {

pkg/query-service/model/response.go

@@ -7,6 +7,7 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
 	"github.com/pkg/errors"
 	"github.com/prometheus/prometheus/promql/parser"
 	"github.com/prometheus/prometheus/util/stats"
@@ -314,6 +315,30 @@ type FlamegraphSpan struct {
 	Events       []Event           `json:"event"`
 	References   []OtelSpanRef     `json:"references,omitempty"`
 	Children     []*FlamegraphSpan `json:"children"`
+	Attributes   map[string]any    `json:"attributes,omitempty"`
+	Resource     map[string]string `json:"resource,omitempty"`
+}
+
+// SetRequestedFields extracts the requested attribute/resource fields from item into s.
+func (s *FlamegraphSpan) SetRequestedFields(item SpanItemV2, fields []telemetrytypes.TelemetryFieldKey) {
+	for _, field := range fields {
+		switch field.FieldContext {
+		case telemetrytypes.FieldContextResource:
+			if v, ok := item.Resources_string[field.Name]; ok && v != "" {
+				if s.Resource == nil {
+					s.Resource = make(map[string]string)
+				}
+				s.Resource[field.Name] = v
+			}
+		case telemetrytypes.FieldContextAttribute:
+			if v := item.AttributeValue(field.Name); v != nil {
+				if s.Attributes == nil {
+					s.Attributes = make(map[string]any)
+				}
+				s.Attributes[field.Name] = v
+			}
+		}
+	}
 }
 
 type GetWaterfallSpansForTraceWithMetadataResponse struct {

pkg/query-service/model/trace.go

@@ -29,3 +29,17 @@ type TraceSummary struct {
 	End      time.Time `ch:"end"`
 	NumSpans uint64    `ch:"num_spans"`
 }
+
+// AttributeValue looks up an attribute across string, number, and bool maps in priority order.
+func (s SpanItemV2) AttributeValue(name string) any {
+	if v, ok := s.Attributes_string[name]; ok && v != "" {
+		return v
+	}
+	if v, ok := s.Attributes_number[name]; ok {
+		return v
+	}
+	if v, ok := s.Attributes_bool[name]; ok {
+		return v
+	}
+	return nil
+}

pkg/telemetrytraces/const.go

@@ -1,50 +1,6 @@
 package telemetrytraces
 
-import (
-	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
-)
-
-const (
-
-	// Internal Columns.
-	SpanTimestampBucketStartColumn = "ts_bucket_start"
-	SpanResourceFingerPrintColumn  = "resource_fingerprint"
-
-	// Intrinsic Columns.
-	SpanTimestampColumn        = "timestamp"
-	SpanTraceIDColumn          = "trace_id"
-	SpanSpanIDColumn           = "span_id"
-	SpanTraceStateColumn       = "trace_state"
-	SpanParentSpanIDColumn     = "parent_span_id"
-	SpanFlagsColumn            = "flags"
-	SpanNameColumn             = "name"
-	SpanKindColumn             = "kind"
-	SpanKindStringColumn       = "kind_string"
-	SpanDurationNanoColumn     = "duration_nano"
-	SpanStatusCodeColumn       = "status_code"
-	SpanStatusMessageColumn    = "status_message"
-	SpanStatusCodeStringColumn = "status_code_string"
-	SpanEventsColumn           = "events"
-	SpanLinksColumn            = "links"
-
-	// Calculated Columns.
-	SpanResponseStatusCodeColumn = "response_status_code"
-	SpanExternalHTTPURLColumn    = "external_http_url"
-	SpanHTTPURLColumn            = "http_url"
-	SpanExternalHTTPMethodColumn = "external_http_method"
-	SpanHTTPMethodColumn         = "http_method"
-	SpanHTTPHostColumn           = "http_host"
-	SpanDBNameColumn             = "db_name"
-	SpanDBOperationColumn        = "db_operation"
-	SpanHasErrorColumn           = "has_error"
-	SpanIsRemoteColumn           = "is_remote"
-
-	// Contextual Columns.
-	SpanAttributesStringColumn = "attributes_string"
-	SpanAttributesNumberColumn = "attributes_number"
-	SpanAttributesBoolColumn   = "attributes_bool"
-	SpanResourcesStringColumn  = "resources_string"
-)
+import "github.com/SigNoz/signoz/pkg/types/telemetrytypes"
 
 var (
 	IntrinsicFields = map[string]telemetrytypes.TelemetryFieldKey{

pkg/telemetrytraces/field_mapper_test.go

@@ -78,16 +78,6 @@ func TestGetFieldKeyName(t *testing.T) {
 			expectedResult: "multiIf(resource.`deployment.environment` IS NOT NULL, resource.`deployment.environment`::String, `resource_string_deployment$$environment_exists`==true, `resource_string_deployment$$environment`, NULL)",
 			expectedError:  nil,
 		},
-		{
-			name: "Contextual map column - attributes_string without span context does not short-circuit",
-			key: telemetrytypes.TelemetryFieldKey{
-				Name:          SpanAttributesStringColumn,
-				FieldContext:  telemetrytypes.FieldContextAttribute,
-				FieldDataType: telemetrytypes.FieldDataTypeString,
-			},
-			expectedResult: "attributes_string['attributes_string']",
-			expectedError:  nil,
-		},
 		{
 			name: "Non-existent column",
 			key: telemetrytypes.TelemetryFieldKey{

pkg/telemetrytraces/statement_builder.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"fmt"
 	"log/slog"
+	"slices"
 	"strings"
 
 	"github.com/SigNoz/signoz/pkg/errors"
@@ -14,6 +15,7 @@ import (
 	qbtypes "github.com/SigNoz/signoz/pkg/types/querybuildertypes/querybuildertypesv5"
 	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
 	"github.com/huandu/go-sqlbuilder"
+	"golang.org/x/exp/maps"
 )
 
 var (
@@ -84,12 +86,40 @@ func (b *traceQueryStatementBuilder) Build(
 		return nil, err
 	}
 
-	isSelectFieldsEmpty := false
+	/*
+		Adding a tech debt note here:
+		This piece of code is a hot fix and should be removed once we close issue: engineering-pod/issues/3622
+	*/
+	/*
+		-------------------------------- Start of tech debt ----------------------------
+	*/
 	if requestType == qbtypes.RequestTypeRaw {
-		// we are expanding here to ensure that all the conflicts are taken care in adjustKeys
-		// i.e if there is a conflict we strip away context of the key in adjustKeys
-		query, isSelectFieldsEmpty = b.expandRawSelectFields(query)
+
+		selectedFields := query.SelectFields
+
+		if len(selectedFields) == 0 {
+			sortedKeys := maps.Keys(DefaultFields)
+			slices.Sort(sortedKeys)
+			for _, key := range sortedKeys {
+				selectedFields = append(selectedFields, DefaultFields[key])
+			}
+			query.SelectFields = selectedFields
+		}
+
+		selectFieldKeys := []string{}
+		for _, field := range selectedFields {
+			selectFieldKeys = append(selectFieldKeys, field.Name)
+		}
+
+		for _, x := range []string{"timestamp", "span_id", "trace_id"} {
+			if !slices.Contains(selectFieldKeys, x) {
+				query.SelectFields = append(query.SelectFields, DefaultFields[x])
+			}
+		}
 	}
+	/*
+		-------------------------------- End of tech debt ----------------------------
+	*/
 
 	query = b.adjustKeys(ctx, keys, query, requestType)
 
@@ -98,7 +128,7 @@ func (b *traceQueryStatementBuilder) Build(
 
 	switch requestType {
 	case qbtypes.RequestTypeRaw:
-		return b.buildListQuery(ctx, q, query, start, end, keys, variables, isSelectFieldsEmpty)
+		return b.buildListQuery(ctx, q, query, start, end, keys, variables)
 	case qbtypes.RequestTypeTimeSeries:
 		return b.buildTimeSeriesQuery(ctx, q, query, start, end, keys, variables)
 	case qbtypes.RequestTypeScalar:
@@ -262,7 +292,6 @@ func (b *traceQueryStatementBuilder) buildListQuery(
 	start, end uint64,
 	keys map[string][]*telemetrytypes.TelemetryFieldKey,
 	variables map[string]qbtypes.VariableItem,
-	isSelectFieldsEmpty bool,
 ) (*qbtypes.Statement, error) {
 
 	var (
@@ -277,6 +306,7 @@ func (b *traceQueryStatementBuilder) buildListQuery(
 		cteArgs = append(cteArgs, args)
 	}
 
+	// TODO: should we deprecate `SelectFields` and return everything from a span like we do for logs?
 	for _, field := range query.SelectFields {
 		colExpr, err := b.fm.ColumnExpressionFor(ctx, start, end, &field, keys)
 		if err != nil {
@@ -285,13 +315,6 @@ func (b *traceQueryStatementBuilder) buildListQuery(
 		sb.SelectMore(colExpr)
 	}
 
-	if isSelectFieldsEmpty {
-		sb.SelectMore(SpanAttributesStringColumn)
-		sb.SelectMore(SpanAttributesNumberColumn)
-		sb.SelectMore(SpanAttributesBoolColumn)
-		sb.SelectMore(SpanResourcesStringColumn)
-	}
-
 	// From table
 	sb.From(fmt.Sprintf("%s.%s", DBName, SpanIndexV3TableName))
 
@@ -818,52 +841,3 @@ func (b *traceQueryStatementBuilder) buildResourceFilterCTE(
 		variables,
 	)
 }
-
-// expandRawSelectFields populates SelectFields for raw (list view) queries.
-// It must be called before adjustKeys so that normalization runs over the full set.
-// Returns the updated query and whether the original SelectFields was empty (i.e. full expansion was performed).
-func (b *traceQueryStatementBuilder) expandRawSelectFields(query qbtypes.QueryBuilderQuery[qbtypes.TraceAggregation]) (qbtypes.QueryBuilderQuery[qbtypes.TraceAggregation], bool) {
-	wasEmpty := len(query.SelectFields) == 0
-	selectFields := []telemetrytypes.TelemetryFieldKey{
-		{Name: SpanTimestampColumn, FieldContext: telemetrytypes.FieldContextSpan},
-		{Name: SpanTraceIDColumn, FieldContext: telemetrytypes.FieldContextSpan},
-		{Name: SpanSpanIDColumn, FieldContext: telemetrytypes.FieldContextSpan},
-	}
-	if wasEmpty {
-		// Select all intrinsic columns
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanTraceStateColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanParentSpanIDColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanFlagsColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanNameColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanKindColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanKindStringColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanDurationNanoColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanStatusCodeColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanStatusMessageColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanStatusCodeStringColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanEventsColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanLinksColumn, FieldContext: telemetrytypes.FieldContextSpan})
-
-		// select all calculated columns
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanResponseStatusCodeColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanExternalHTTPURLColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanHTTPURLColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanExternalHTTPMethodColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanHTTPMethodColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanHTTPHostColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanDBNameColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanDBOperationColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanHasErrorColumn, FieldContext: telemetrytypes.FieldContextSpan})
-		selectFields = append(selectFields, telemetrytypes.TelemetryFieldKey{Name: SpanIsRemoteColumn, FieldContext: telemetrytypes.FieldContextSpan})
-	} else {
-		for _, field := range query.SelectFields {
-			// TODO(tvats): If a user specifies attribute.timestamp in the select fields, this loop will basically ignore it, as we already added a field by default. This can be fixed once we close https://github.com/SigNoz/engineering-pod/issues/3693
-			if field.Name == SpanTimestampColumn || field.Name == SpanTraceIDColumn || field.Name == SpanSpanIDColumn {
-				continue
-			}
-			selectFields = append(selectFields, field)
-		}
-	}
-	query.SelectFields = selectFields
-	return query, wasEmpty
-}

pkg/telemetrytraces/stmt_builder_test.go

@@ -436,7 +436,7 @@ func TestStatementBuilderListQuery(t *testing.T) {
 				},
 			},
 			expected: qbtypes.Statement{
-				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT timestamp AS `timestamp`, trace_id AS `trace_id`, span_id AS `span_id`, name AS `name`, multiIf(resource.`service.name` IS NOT NULL, resource.`service.name`::String, mapContains(resources_string, 'service.name'), resources_string['service.name'], NULL) AS `service.name`, duration_nano AS `duration_nano`, `attribute_number_cart$$items_count` AS `cart.items_count` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
+				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT name AS `name`, multiIf(resource.`service.name` IS NOT NULL, resource.`service.name`::String, mapContains(resources_string, 'service.name'), resources_string['service.name'], NULL) AS `service.name`, duration_nano AS `duration_nano`, `attribute_number_cart$$items_count` AS `cart.items_count`, timestamp AS `timestamp`, span_id AS `span_id`, trace_id AS `trace_id` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
 				Args:  []any{"redis-manual", "%service.name%", "%service.name\":\"redis-manual%", uint64(1747945619), uint64(1747983448), "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
 			},
 			expectedErr: nil,
@@ -465,7 +465,7 @@ func TestStatementBuilderListQuery(t *testing.T) {
 				Limit: 10,
 			},
 			expected: qbtypes.Statement{
-				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT timestamp AS `timestamp`, trace_id AS `trace_id`, span_id AS `span_id`, trace_state AS `trace_state`, parent_span_id AS `parent_span_id`, flags AS `flags`, name AS `name`, kind AS `kind`, kind_string AS `kind_string`, duration_nano AS `duration_nano`, status_code AS `status_code`, status_message AS `status_message`, status_code_string AS `status_code_string`, events AS `events`, links AS `links`, response_status_code AS `response_status_code`, external_http_url AS `external_http_url`, http_url AS `http_url`, external_http_method AS `external_http_method`, http_method AS `http_method`, http_host AS `http_host`, db_name AS `db_name`, db_operation AS `db_operation`, has_error AS `has_error`, is_remote AS `is_remote`, attributes_string, attributes_number, attributes_bool, resources_string FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? ORDER BY attributes_string['user.id'] AS `user.id` desc LIMIT ?",
+				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT duration_nano AS `duration_nano`, name AS `name`, response_status_code AS `response_status_code`, multiIf(resource.`service.name` IS NOT NULL, resource.`service.name`::String, mapContains(resources_string, 'service.name'), resources_string['service.name'], NULL) AS `service.name`, span_id AS `span_id`, timestamp AS `timestamp`, trace_id AS `trace_id` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? ORDER BY attributes_string['user.id'] AS `user.id` desc LIMIT ?",
 				Args:  []any{"redis-manual", "%service.name%", "%service.name\":\"redis-manual%", uint64(1747945619), uint64(1747983448), "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
 			},
 			expectedErr: nil,
@@ -509,7 +509,7 @@ func TestStatementBuilderListQuery(t *testing.T) {
 				Limit: 10,
 			},
 			expected: qbtypes.Statement{
-				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT timestamp AS `timestamp`, trace_id AS `trace_id`, span_id AS `span_id`, name AS `name`, resource_string_service$$name AS `serviceName`, duration_nano AS `durationNano`, http_method AS `httpMethod`, response_status_code AS `responseStatusCode` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
+				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT name AS `name`, resource_string_service$$name AS `serviceName`, duration_nano AS `durationNano`, http_method AS `httpMethod`, response_status_code AS `responseStatusCode`, timestamp AS `timestamp`, span_id AS `span_id`, trace_id AS `trace_id` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
 				Args:  []any{"redis-manual", "%service.name%", "%service.name\":\"redis-manual%", uint64(1747945619), uint64(1747983448), "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
 			},
 			expectedErr: nil,
@@ -553,7 +553,7 @@ func TestStatementBuilderListQuery(t *testing.T) {
 				Limit: 10,
 			},
 			expected: qbtypes.Statement{
-				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT timestamp AS `timestamp`, trace_id AS `trace_id`, span_id AS `span_id`, name AS `name`, resource_string_service$$name AS `serviceName`, duration_nano AS `durationNano`, http_method AS `httpMethod`, multiIf(toString(`attribute_string_mixed$$materialization$$key`) != '', toString(`attribute_string_mixed$$materialization$$key`), toString(multiIf(resource.`mixed.materialization.key` IS NOT NULL, resource.`mixed.materialization.key`::String, mapContains(resources_string, 'mixed.materialization.key'), resources_string['mixed.materialization.key'], NULL)) != '', toString(multiIf(resource.`mixed.materialization.key` IS NOT NULL, resource.`mixed.materialization.key`::String, mapContains(resources_string, 'mixed.materialization.key'), resources_string['mixed.materialization.key'], NULL)), NULL) AS `mixed.materialization.key` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
+				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT name AS `name`, resource_string_service$$name AS `serviceName`, duration_nano AS `durationNano`, http_method AS `httpMethod`, multiIf(toString(`attribute_string_mixed$$materialization$$key`) != '', toString(`attribute_string_mixed$$materialization$$key`), toString(multiIf(resource.`mixed.materialization.key` IS NOT NULL, resource.`mixed.materialization.key`::String, mapContains(resources_string, 'mixed.materialization.key'), resources_string['mixed.materialization.key'], NULL)) != '', toString(multiIf(resource.`mixed.materialization.key` IS NOT NULL, resource.`mixed.materialization.key`::String, mapContains(resources_string, 'mixed.materialization.key'), resources_string['mixed.materialization.key'], NULL)), NULL) AS `mixed.materialization.key`, timestamp AS `timestamp`, span_id AS `span_id`, trace_id AS `trace_id` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
 				Args:  []any{"redis-manual", "%service.name%", "%service.name\":\"redis-manual%", uint64(1747945619), uint64(1747983448), "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
 			},
 			expectedErr: nil,
@@ -598,7 +598,7 @@ func TestStatementBuilderListQuery(t *testing.T) {
 				Limit: 10,
 			},
 			expected: qbtypes.Statement{
-				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT timestamp AS `timestamp`, trace_id AS `trace_id`, span_id AS `span_id`, name AS `name`, resource_string_service$$name AS `serviceName`, duration_nano AS `durationNano`, http_method AS `httpMethod`, `attribute_string_mixed$$materialization$$key` AS `mixed.materialization.key` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
+				Query: "WITH __resource_filter AS (SELECT fingerprint FROM signoz_traces.distributed_traces_v3_resource WHERE (simpleJSONExtractString(labels, 'service.name') = ? AND labels LIKE ? AND labels LIKE ?) AND seen_at_ts_bucket_start >= ? AND seen_at_ts_bucket_start <= ?) SELECT name AS `name`, resource_string_service$$name AS `serviceName`, duration_nano AS `durationNano`, http_method AS `httpMethod`, `attribute_string_mixed$$materialization$$key` AS `mixed.materialization.key`, timestamp AS `timestamp`, span_id AS `span_id`, trace_id AS `trace_id` FROM signoz_traces.distributed_signoz_index_v3 WHERE resource_fingerprint GLOBAL IN (SELECT fingerprint FROM __resource_filter) AND timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
 				Args:  []any{"redis-manual", "%service.name%", "%service.name\":\"redis-manual%", uint64(1747945619), uint64(1747983448), "1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
 			},
 			expectedErr: nil,
@@ -706,7 +706,7 @@ func TestStatementBuilderListQueryWithCorruptData(t *testing.T) {
 				Limit:        10,
 			},
 			expected: qbtypes.Statement{
-				Query: "SELECT timestamp AS `timestamp`, trace_id AS `trace_id`, span_id AS `span_id`, trace_state AS `trace_state`, parent_span_id AS `parent_span_id`, flags AS `flags`, name AS `name`, kind AS `kind`, kind_string AS `kind_string`, duration_nano AS `duration_nano`, status_code AS `status_code`, status_message AS `status_message`, status_code_string AS `status_code_string`, events AS `events`, links AS `links`, response_status_code AS `response_status_code`, external_http_url AS `external_http_url`, http_url AS `http_url`, external_http_method AS `external_http_method`, http_method AS `http_method`, http_host AS `http_host`, db_name AS `db_name`, db_operation AS `db_operation`, has_error AS `has_error`, is_remote AS `is_remote`, attributes_string, attributes_number, attributes_bool, resources_string FROM signoz_traces.distributed_signoz_index_v3 WHERE timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
+				Query: "SELECT duration_nano AS `duration_nano`, name AS `name`, response_status_code AS `response_status_code`, multiIf(resource.`service.name` IS NOT NULL, resource.`service.name`::String, mapContains(resources_string, 'service.name'), resources_string['service.name'], NULL) AS `service.name`, span_id AS `span_id`, timestamp AS `timestamp`, trace_id AS `trace_id` FROM signoz_traces.distributed_signoz_index_v3 WHERE timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? LIMIT ?",
 				Args:  []any{"1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
 			},
 			expectedErr: nil,
@@ -739,7 +739,7 @@ func TestStatementBuilderListQueryWithCorruptData(t *testing.T) {
 				}},
 			},
 			expected: qbtypes.Statement{
-				Query: "SELECT timestamp AS `timestamp`, trace_id AS `trace_id`, span_id AS `span_id`, trace_state AS `trace_state`, parent_span_id AS `parent_span_id`, flags AS `flags`, name AS `name`, kind AS `kind`, kind_string AS `kind_string`, duration_nano AS `duration_nano`, status_code AS `status_code`, status_message AS `status_message`, status_code_string AS `status_code_string`, events AS `events`, links AS `links`, response_status_code AS `response_status_code`, external_http_url AS `external_http_url`, http_url AS `http_url`, external_http_method AS `external_http_method`, http_method AS `http_method`, http_host AS `http_host`, db_name AS `db_name`, db_operation AS `db_operation`, has_error AS `has_error`, is_remote AS `is_remote`, attributes_string, attributes_number, attributes_bool, resources_string FROM signoz_traces.distributed_signoz_index_v3 WHERE timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? ORDER BY timestamp AS `timestamp` asc LIMIT ?",
+				Query: "SELECT duration_nano AS `duration_nano`, name AS `name`, response_status_code AS `response_status_code`, multiIf(resource.`service.name` IS NOT NULL, resource.`service.name`::String, mapContains(resources_string, 'service.name'), resources_string['service.name'], NULL) AS `service.name`, span_id AS `span_id`, timestamp AS `timestamp`, trace_id AS `trace_id` FROM signoz_traces.distributed_signoz_index_v3 WHERE timestamp >= ? AND timestamp < ? AND ts_bucket_start >= ? AND ts_bucket_start <= ? ORDER BY timestamp AS `timestamp` asc LIMIT ?",
 				Args:  []any{"1747947419000000000", "1747983448000000000", uint64(1747945619), uint64(1747983448), 10},
 			},
 			expectedErr: nil,

pkg/types/globaltypes/endpoint.go

@@ -1,13 +1,15 @@
 package globaltypes
 
 type Endpoint struct {
-	ExternalURL  string `json:"external_url"`
-	IngestionURL string `json:"ingestion_url"`
+	ExternalURL  string  `json:"external_url" required:"true"`
+	IngestionURL string  `json:"ingestion_url" required:"true"`
+	MCPURL       *string `json:"mcp_url" required:"true" nullable:"true"`
 }
 
-func NewEndpoint(externalURL, ingestionURL string) Endpoint {
+func NewEndpoint(externalURL, ingestionURL string, mcpURL *string) Endpoint {
 	return Endpoint{
 		ExternalURL:  externalURL,
 		IngestionURL: ingestionURL,
+		MCPURL:       mcpURL,
 	}
 }

pkg/types/tracedetailtypes/aggregation.go

@@ -0,0 +1,50 @@
+package tracedetailtypes
+
+import (
+	"github.com/SigNoz/signoz/pkg/errors"
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
+)
+
+const maxAggregationItems = 10
+
+var ErrTooManyAggregationItems = errors.NewInvalidInputf(errors.CodeInvalidInput, "aggregations request exceeds maximum of %d items", maxAggregationItems)
+
+// SpanAggregationType defines the aggregation to compute over spans grouped by a field.
+type SpanAggregationType string
+
+const (
+	SpanAggregationSpanCount               SpanAggregationType = "spanCount"
+	SpanAggregationExecutionTimePercentage SpanAggregationType = "executionTimePercentage"
+	SpanAggregationDuration                SpanAggregationType = "duration"
+)
+
+// SpanAggregation is a single aggregation request item: which field to group by and how.
+type SpanAggregation struct {
+	Field       telemetrytypes.TelemetryFieldKey `json:"field"`
+	Aggregation SpanAggregationType              `json:"aggregation"`
+}
+
+// SpanAggregationResult is the computed result for one aggregation request item.
+// Duration values are in milliseconds.
+type SpanAggregationResult struct {
+	Field       telemetrytypes.TelemetryFieldKey `json:"field"`
+	Aggregation SpanAggregationType              `json:"aggregation"`
+	Value       map[string]uint64                `json:"value" nullable:"true"`
+}
+
+func (s SpanAggregationType) Enum() []any {
+	return []any{
+		SpanAggregationSpanCount,
+		SpanAggregationExecutionTimePercentage,
+		SpanAggregationDuration,
+	}
+}
+
+func (s SpanAggregationType) isValid() bool {
+	for _, v := range s.Enum() {
+		if v == s {
+			return true
+		}
+	}
+	return false
+}

pkg/types/tracedetailtypes/aggregation_test.go

@@ -0,0 +1,240 @@
+package tracedetailtypes
+
+import (
+	"testing"
+
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
+	"github.com/stretchr/testify/assert"
+)
+
+// mkASpan builds a WaterfallSpan with timing and field data for analytics tests.
+func mkASpan(id string, resource map[string]string, attributes map[string]any, startNs, durationNs uint64) *WaterfallSpan {
+	return &WaterfallSpan{
+		SpanID:       id,
+		Resource:     resource,
+		Attributes:   attributes,
+		TimeUnixNano: startNs,
+		DurationNano: durationNs,
+		Children:     make([]*WaterfallSpan, 0),
+	}
+}
+
+func buildTraceFromSpans(spans ...*WaterfallSpan) *WaterfallTrace {
+	spanMap := make(map[string]*WaterfallSpan, len(spans))
+	var startTime, endTime uint64
+	initialized := false
+	for _, s := range spans {
+		spanMap[s.SpanID] = s
+		if !initialized || s.TimeUnixNano < startTime {
+			startTime = s.TimeUnixNano
+			initialized = true
+		}
+		if end := s.TimeUnixNano + s.DurationNano; end > endTime {
+			endTime = end
+		}
+	}
+	return NewWaterfallTrace(startTime, endTime, uint64(len(spanMap)), 0, spanMap, nil, nil, false)
+}
+
+var (
+	fieldServiceName = telemetrytypes.TelemetryFieldKey{
+		Name:         "service.name",
+		FieldContext: telemetrytypes.FieldContextResource,
+	}
+	fieldHTTPMethod = telemetrytypes.TelemetryFieldKey{
+		Name:         "http.method",
+		FieldContext: telemetrytypes.FieldContextAttribute,
+	}
+	fieldCached = telemetrytypes.TelemetryFieldKey{
+		Name:         "db.cached",
+		FieldContext: telemetrytypes.FieldContextAttribute,
+	}
+)
+
+func TestGetSpanAggregation_SpanCount(t *testing.T) {
+	tests := []struct {
+		name  string
+		trace *WaterfallTrace
+		field telemetrytypes.TelemetryFieldKey
+		want  map[string]uint64
+	}{
+		{
+			name: "counts by resource field",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "frontend"}, nil, 0, 10),
+				mkASpan("s2", map[string]string{"service.name": "frontend"}, nil, 10, 5),
+				mkASpan("s3", map[string]string{"service.name": "backend"}, nil, 20, 8),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"frontend": 2, "backend": 1},
+		},
+		{
+			name: "counts by string attribute field",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", nil, map[string]any{"http.method": "GET"}, 0, 10),
+				mkASpan("s2", nil, map[string]any{"http.method": "POST"}, 10, 5),
+				mkASpan("s3", nil, map[string]any{"http.method": "GET"}, 20, 8),
+			),
+			field: fieldHTTPMethod,
+			want:  map[string]uint64{"GET": 2, "POST": 1},
+		},
+		{
+			name: "counts by boolean attribute field",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", nil, map[string]any{"db.cached": true}, 0, 10),
+				mkASpan("s2", nil, map[string]any{"db.cached": false}, 10, 5),
+				mkASpan("s3", nil, map[string]any{"db.cached": true}, 20, 8),
+			),
+			field: fieldCached,
+			want:  map[string]uint64{"true": 2, "false": 1},
+		},
+		{
+			name: "spans missing the field are excluded",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "frontend"}, nil, 0, 10),
+				mkASpan("s2", map[string]string{}, nil, 10, 5), // no service.name
+				mkASpan("s3", map[string]string{"service.name": "backend"}, nil, 20, 8),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"frontend": 1, "backend": 1},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := tc.trace.GetSpanAggregation(SpanAggregationSpanCount, tc.field)
+			assert.Equal(t, tc.field, result.Field)
+			assert.Equal(t, SpanAggregationSpanCount, result.Aggregation)
+			assert.Equal(t, tc.want, result.Value)
+		})
+	}
+}
+
+func TestGetSpanAggregation_Duration(t *testing.T) {
+	tests := []struct {
+		name  string
+		trace *WaterfallTrace
+		field telemetrytypes.TelemetryFieldKey
+		want  map[string]uint64
+	}{
+		{
+			name: "non-overlapping spans — merged equals sum",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "frontend"}, nil, 0, 100),
+				mkASpan("s2", map[string]string{"service.name": "frontend"}, nil, 100, 50),
+				mkASpan("s3", map[string]string{"service.name": "backend"}, nil, 0, 80),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"frontend": 150, "backend": 80},
+		},
+		{
+			name: "non-overlapping attribute groups — merged equals sum",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", nil, map[string]any{"http.method": "GET"}, 0, 30),
+				mkASpan("s2", nil, map[string]any{"http.method": "GET"}, 50, 20),
+				mkASpan("s3", nil, map[string]any{"http.method": "POST"}, 0, 70),
+			),
+			field: fieldHTTPMethod,
+			want:  map[string]uint64{"GET": 50, "POST": 70},
+		},
+		{
+			name: "overlapping spans — non-overlapping interval merge",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "svc"}, nil, 0, 10),
+				mkASpan("s2", map[string]string{"service.name": "svc"}, nil, 5, 10),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"svc": 15}, // [0,10] ∪ [5,15] = [0,15]
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := tc.trace.GetSpanAggregation(SpanAggregationDuration, tc.field)
+			assert.Equal(t, tc.field, result.Field)
+			assert.Equal(t, SpanAggregationDuration, result.Aggregation)
+			assert.Equal(t, tc.want, result.Value)
+		})
+	}
+}
+
+func TestGetSpanAggregation_ExecutionTimePercentage(t *testing.T) {
+	tests := []struct {
+		name  string
+		trace *WaterfallTrace
+		field telemetrytypes.TelemetryFieldKey
+		want  map[string]uint64
+	}{
+		{
+			// trace [0,30]: svc occupies [0,10]+[20,30]=20 → 20*100/30 = 66%
+			name: "non-overlapping spans",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "svc"}, nil, 0, 10),
+				mkASpan("s2", map[string]string{"service.name": "svc"}, nil, 20, 10),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"svc": 66},
+		},
+		{
+			// trace [0,15]: svc [0,15]=15 → 100%
+			name: "partially overlapping spans",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "svc"}, nil, 0, 10),
+				mkASpan("s2", map[string]string{"service.name": "svc"}, nil, 5, 10),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"svc": 100},
+		},
+		{
+			// trace [0,20]: outer absorbs inner → 100%
+			name: "fully contained span",
+			trace: buildTraceFromSpans(
+				mkASpan("outer", map[string]string{"service.name": "svc"}, nil, 0, 20),
+				mkASpan("inner", map[string]string{"service.name": "svc"}, nil, 5, 5),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"svc": 100},
+		},
+		{
+			// trace [0,30]: svc [0,15]+[20,30]=25 → 25*100/30 = 83%
+			name: "three spans with two merges",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "svc"}, nil, 0, 10),
+				mkASpan("s2", map[string]string{"service.name": "svc"}, nil, 5, 10),
+				mkASpan("s3", map[string]string{"service.name": "svc"}, nil, 20, 10),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"svc": 83},
+		},
+		{
+			// trace [0,28]: frontend [0,15]=15 → 53%, backend [0,5]+[20,28]=13 → 46%
+			name: "independent groups are computed separately",
+			trace: buildTraceFromSpans(
+				mkASpan("a1", map[string]string{"service.name": "frontend"}, nil, 0, 10),
+				mkASpan("a2", map[string]string{"service.name": "frontend"}, nil, 5, 10),
+				mkASpan("b1", map[string]string{"service.name": "backend"}, nil, 0, 5),
+				mkASpan("b2", map[string]string{"service.name": "backend"}, nil, 20, 8),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"frontend": 53, "backend": 46},
+		},
+		{
+			// trace [100,150]: svc [100,150]=50 → 100%
+			name: "single span",
+			trace: buildTraceFromSpans(
+				mkASpan("s1", map[string]string{"service.name": "svc"}, nil, 100, 50),
+			),
+			field: fieldServiceName,
+			want:  map[string]uint64{"svc": 100},
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			result := tc.trace.GetSpanAggregation(SpanAggregationExecutionTimePercentage, tc.field)
+			assert.Equal(t, tc.field, result.Field)
+			assert.Equal(t, SpanAggregationExecutionTimePercentage, result.Aggregation)
+			assert.Equal(t, tc.want, result.Value)
+		})
+	}
+}

pkg/types/tracedetailtypes/waterfall_span.go

@@ -2,11 +2,13 @@ package tracedetailtypes
 
 import (
 	"encoding/json"
+	"fmt"
 	"maps"
 	"sort"
 	"time"
 
 	"github.com/SigNoz/signoz/pkg/errors"
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
 )
 
 const (
@@ -21,9 +23,27 @@ var ErrTraceNotFound = errors.NewNotFoundf(errors.CodeNotFound, "trace not found
 
 // PostableWaterfall is the request body for the v3 waterfall API.
 type PostableWaterfall struct {
-	SelectedSpanID   string   `json:"selectedSpanId"`
-	UncollapsedSpans []string `json:"uncollapsedSpans"`
-	Limit            uint     `json:"limit"`
+	SelectedSpanID   string            `json:"selectedSpanId"`
+	UncollapsedSpans []string          `json:"uncollapsedSpans"`
+	Limit            uint              `json:"limit"`
+	Aggregations     []SpanAggregation `json:"aggregations"`
+}
+
+func (p *PostableWaterfall) Validate() error {
+	if len(p.Aggregations) > maxAggregationItems {
+		return ErrTooManyAggregationItems
+	}
+	for _, a := range p.Aggregations {
+		if !a.Aggregation.isValid() {
+			return errors.NewInvalidInputf(errors.CodeInvalidInput, "unknown aggregation type: %q", a.Aggregation)
+		}
+		fc := a.Field.FieldContext
+		if fc != telemetrytypes.FieldContextResource && fc != telemetrytypes.FieldContextAttribute {
+			return errors.NewInvalidInputf(errors.CodeInvalidInput, "aggregation field context must be %q or %q, got %q",
+				telemetrytypes.FieldContextResource, telemetrytypes.FieldContextAttribute, fc)
+		}
+	}
+	return nil
 }
 
 // Event represents a span event.
@@ -160,7 +180,24 @@ func (ws *WaterfallSpan) GetSubtreeNodeCount() uint64 {
 	return count
 }
 
-// getPreOrderedSpans returns spans in pre-order, uncollapsedSpanIDs must be pre-computed.
+// FieldValue returns the string representation of field's value on this span for grouping.
+// The bool reports whether the field was present with a non-empty value.
+func (ws *WaterfallSpan) FieldValue(field telemetrytypes.TelemetryFieldKey) (string, bool) {
+	switch field.FieldContext {
+	case telemetrytypes.FieldContextResource:
+		v := ws.Resource[field.Name]
+		return v, v != ""
+	case telemetrytypes.FieldContextAttribute:
+		v, ok := ws.Attributes[field.Name]
+		if !ok {
+			return "", false
+		}
+		str := fmt.Sprintf("%v", v)
+		return str, str != ""
+	}
+	return "", false
+}
+
 func (ws *WaterfallSpan) getPreOrderedSpans(uncollapsedSpanIDs map[string]struct{}, selectAll bool, level uint64) []*WaterfallSpan {
 	result := []*WaterfallSpan{ws.GetWithoutChildren(level)}
 	_, isUncollapsed := uncollapsedSpanIDs[ws.SpanID]

pkg/types/tracedetailtypes/waterfall_trace.go

@@ -8,6 +8,7 @@ import (
 	"time"
 
 	"github.com/SigNoz/signoz/pkg/types/cachetypes"
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
 )
 
 type TraceSummary struct {
@@ -31,17 +32,19 @@ type WaterfallTrace struct {
 
 // GettableWaterfallTrace is the response for the v3 waterfall API.
 type GettableWaterfallTrace struct {
-	StartTimestampMillis          uint64            `json:"startTimestampMillis"`
-	EndTimestampMillis            uint64            `json:"endTimestampMillis"`
-	RootServiceName               string            `json:"rootServiceName"`
-	RootServiceEntryPoint         string            `json:"rootServiceEntryPoint"`
-	TotalSpansCount               uint64            `json:"totalSpansCount"`
-	TotalErrorSpansCount          uint64            `json:"totalErrorSpansCount"`
-	ServiceNameToTotalDurationMap map[string]uint64 `json:"serviceNameToTotalDurationMap"`
-	Spans                         []*WaterfallSpan  `json:"spans"`
-	HasMissingSpans               bool              `json:"hasMissingSpans"`
-	UncollapsedSpans              []string          `json:"uncollapsedSpans"`
-	HasMore                       bool              `json:"hasMore"`
+	StartTimestampMillis  uint64 `json:"startTimestampMillis"`
+	EndTimestampMillis    uint64 `json:"endTimestampMillis"`
+	RootServiceName       string `json:"rootServiceName"`
+	RootServiceEntryPoint string `json:"rootServiceEntryPoint"`
+	TotalSpansCount       uint64 `json:"totalSpansCount"`
+	TotalErrorSpansCount  uint64 `json:"totalErrorSpansCount"`
+	// Deprecated: use Aggregations with SpanAggregationExecutionTimePercentage on the service.name field instead.
+	ServiceNameToTotalDurationMap map[string]uint64       `json:"serviceNameToTotalDurationMap"`
+	Spans                         []*WaterfallSpan        `json:"spans"`
+	HasMissingSpans               bool                    `json:"hasMissingSpans"`
+	UncollapsedSpans              []string                `json:"uncollapsedSpans"`
+	HasMore                       bool                    `json:"hasMore"`
+	Aggregations                  []SpanAggregationResult `json:"aggregations"`
 }
 
 // NewWaterfallTrace constructs a WaterfallTrace from processed span data.
@@ -240,12 +243,13 @@ func (wt *WaterfallTrace) UnmarshalBinary(data []byte) error {
 	return json.Unmarshal(data, wt)
 }
 
-// NewGettableWaterfallTrace constructs a WaterfallResponse from processed trace data and selected spans.
+// NewGettableWaterfallTrace constructs a GettableWaterfallTrace from processed trace data and selected spans.
 func NewGettableWaterfallTrace(
 	traceData *WaterfallTrace,
 	selectedSpans []*WaterfallSpan,
 	uncollapsedSpans []string,
 	selectAllSpans bool,
+	aggregations []SpanAggregationResult,
 ) *GettableWaterfallTrace {
 	var rootServiceName, rootServiceEntryPoint string
 	if len(traceData.TraceRoots) > 0 {
@@ -263,6 +267,15 @@ func NewGettableWaterfallTrace(
 		span.TimeUnixNano = span.TimeUnixNano / 1_000_000
 	}
 
+	// duration values are in nanoseconds; convert in-place to milliseconds.
+	for i := range aggregations {
+		if aggregations[i].Aggregation == SpanAggregationDuration {
+			for k, v := range aggregations[i].Value {
+				aggregations[i].Value[k] = v / 1_000_000
+			}
+		}
+	}
+
 	return &GettableWaterfallTrace{
 		Spans:                         selectedSpans,
 		UncollapsedSpans:              uncollapsedSpans,
@@ -275,6 +288,7 @@ func NewGettableWaterfallTrace(
 		ServiceNameToTotalDurationMap: serviceDurationsMillis,
 		HasMissingSpans:               traceData.HasMissingSpans,
 		HasMore:                       !selectAllSpans,
+		Aggregations:                  aggregations,
 	}
 }
 
@@ -307,29 +321,82 @@ func calculateServiceTime(spanIDToSpanNodeMap map[string]*WaterfallSpan) map[str
 
 	totalTimes := make(map[string]uint64)
 	for service, spans := range serviceSpans {
-		sort.Slice(spans, func(i, j int) bool {
-			return spans[i].TimeUnixNano < spans[j].TimeUnixNano
-		})
-
-		currentStart := spans[0].TimeUnixNano
-		currentEnd := currentStart + spans[0].DurationNano
-		total := uint64(0)
-
-		for _, span := range spans[1:] {
-			startNano := span.TimeUnixNano
-			endNano := startNano + span.DurationNano
-			if currentEnd >= startNano {
-				if endNano > currentEnd {
-					currentEnd = endNano
-				}
-			} else {
-				total += currentEnd - currentStart
-				currentStart = startNano
-				currentEnd = endNano
-			}
-		}
-		total += currentEnd - currentStart
-		totalTimes[service] = total
+		totalTimes[service] = mergeSpanIntervals(spans)
 	}
 	return totalTimes
 }
+
+// mergeSpanIntervals computes non-overlapping execution time for a set of spans.
+func mergeSpanIntervals(spans []*WaterfallSpan) uint64 {
+	if len(spans) == 0 {
+		return 0
+	}
+	sort.Slice(spans, func(i, j int) bool {
+		return spans[i].TimeUnixNano < spans[j].TimeUnixNano
+	})
+
+	currentStart := spans[0].TimeUnixNano
+	currentEnd := currentStart + spans[0].DurationNano
+	total := uint64(0)
+
+	for _, span := range spans[1:] {
+		startNano := span.TimeUnixNano
+		endNano := startNano + span.DurationNano
+		if currentEnd >= startNano {
+			if endNano > currentEnd {
+				currentEnd = endNano
+			}
+		} else {
+			total += currentEnd - currentStart
+			currentStart = startNano
+			currentEnd = endNano
+		}
+	}
+	return total + (currentEnd - currentStart)
+}
+
+// GetSpanAggregation computes one aggregation result over all spans in the trace.
+// Duration values are returned in nanoseconds; callers convert to milliseconds as needed.
+func (wt *WaterfallTrace) GetSpanAggregation(aggregation SpanAggregationType, field telemetrytypes.TelemetryFieldKey) SpanAggregationResult {
+	result := SpanAggregationResult{
+		Field:       field,
+		Aggregation: aggregation,
+		Value:       make(map[string]uint64),
+	}
+
+	switch aggregation {
+	case SpanAggregationSpanCount:
+		for _, span := range wt.SpanIDToSpanNodeMap {
+			if key, ok := span.FieldValue(field); ok {
+				result.Value[key]++
+			}
+		}
+
+	case SpanAggregationDuration:
+		spansByField := make(map[string][]*WaterfallSpan)
+		for _, span := range wt.SpanIDToSpanNodeMap {
+			if key, ok := span.FieldValue(field); ok {
+				spansByField[key] = append(spansByField[key], span)
+			}
+		}
+		for key, spans := range spansByField {
+			result.Value[key] = mergeSpanIntervals(spans)
+		}
+
+	case SpanAggregationExecutionTimePercentage:
+		traceDuration := wt.EndTime - wt.StartTime
+		spansByField := make(map[string][]*WaterfallSpan)
+		for _, span := range wt.SpanIDToSpanNodeMap {
+			if key, ok := span.FieldValue(field); ok {
+				spansByField[key] = append(spansByField[key], span)
+			}
+		}
+		if traceDuration > 0 {
+			for key, spans := range spansByField {
+				result.Value[key] = mergeSpanIntervals(spans) * 100 / traceDuration
+			}
+		}
+	}
+
+	return result
+}

tests/integration/tests/querier/04_traces.py

@@ -481,24 +481,25 @@ def test_traces_list(
                     "name": "A",
                     "signal": "traces",
                     "disabled": False,
-                    "selectFields": [
-                        {"name": "span_id"},
-                        {"name": "span.timestamp"},
-                        {"name": "trace_id"},
-                    ],
                     "order": [{"key": {"name": "timestamp"}, "direction": "desc"}],
                     "limit": 1,
                 },
             },
             HTTPStatus.OK,
             lambda x: [
+                x[3].duration_nano,
+                x[3].name,
+                x[3].response_status_code,
+                x[3].service_name,
                 x[3].span_id,
                 format_timestamp(x[3].timestamp),
                 x[3].trace_id,
             ],  # type: Callable[[List[Traces]], List[Any]]
         ),
         # Case 2: order by attribute timestamp field which is there in attributes as well
-        # attribute.timestamp gets adjusted to span.timestamp
+        # This should break but it doesn't because attribute.timestamp gets adjusted to timestamp
+        # because of default trace.timestamp gets added by default and bug in field mapper picks
+        # instrinsic field
         pytest.param(
             {
                 "type": "builder_query",
@@ -506,19 +507,16 @@ def test_traces_list(
                     "name": "A",
                     "signal": "traces",
                     "disabled": False,
-                    "selectFields": [
-                        {"name": "span_id"},
-                        {"name": "span.timestamp"},
-                        {"name": "trace_id"},
-                    ],
-                    "order": [
-                        {"key": {"name": "attribute.timestamp"}, "direction": "desc"}
-                    ],
+                    "order": [{"key": {"name": "attribute.timestamp"}, "direction": "desc"}],
                     "limit": 1,
                 },
             },
             HTTPStatus.OK,
             lambda x: [
+                x[3].duration_nano,
+                x[3].name,
+                x[3].response_status_code,
+                x[3].service_name,
                 x[3].span_id,
                 format_timestamp(x[3].timestamp),
                 x[3].trace_id,
@@ -544,7 +542,7 @@ def test_traces_list(
             ],  # type: Callable[[List[Traces]], List[Any]]
         ),
         # Case 4: select attribute.timestamp with empty order by
-        # This returns the one span which has attribute.timestamp
+        # This doesn't return any data because of where_clause using aliased timestamp
         pytest.param(
             {
                 "type": "builder_query",
@@ -558,11 +556,7 @@ def test_traces_list(
                 },
             },
             HTTPStatus.OK,
-            lambda x: [
-                x[0].span_id,
-                format_timestamp(x[0].timestamp),
-                x[0].trace_id,
-            ],  # type: Callable[[List[Traces]], List[Any]]
+            lambda x: [],  # type: Callable[[List[Traces]], List[Any]]
         ),
         # Case 5: select timestamp with timestamp order by
         pytest.param(
@@ -699,112 +693,6 @@ def test_traces_list_with_corrupt_data(
                 assert data[key] == value
 
 
-@pytest.mark.parametrize(
-    "select_fields,status_code,expected_keys",
-    [
-        pytest.param(
-            [],
-            HTTPStatus.OK,
-            [
-                # all intrinsic column
-                "timestamp",
-                "trace_id",
-                "span_id",
-                "trace_state",
-                "parent_span_id",
-                "flags",
-                "name",
-                "kind",
-                "kind_string",
-                "duration_nano",
-                "status_code",
-                "status_message",
-                "status_code_string",
-                "events",
-                "links",
-                # all calculated columns
-                "response_status_code",
-                "external_http_url",
-                "http_url",
-                "external_http_method",
-                "http_method",
-                "http_host",
-                "db_name",
-                "db_operation",
-                "has_error",
-                "is_remote",
-                # all contextual columns (merged in response layer)
-                "attributes",
-                "resource",
-            ],
-        ),
-        pytest.param(
-            [
-                {"name": "service.name"},
-            ],
-            HTTPStatus.OK,
-            ["timestamp", "trace_id", "span_id", "service.name"],
-        ),
-    ],
-)
-def test_traces_list_with_select_fields(
-    signoz: types.SigNoz,
-    create_user_admin: None,  # pylint: disable=unused-argument
-    get_token: Callable[[str, str], str],
-    insert_traces: Callable[[List[Traces]], None],
-    select_fields: List[dict],
-    status_code: HTTPStatus,
-    expected_keys: List[str],
-) -> None:
-    """
-    Setup:
-    Insert 4 traces with different attributes.
-
-    Tests:
-    1. Empty select fields should return all the fields.
-    2. Non empty select field should return the select field along with timestamp, trace_id and span_id.
-    """
-    traces = (
-        generate_traces_with_corrupt_metadata()
-    )  # using this as the data doesn't matter
-
-    insert_traces(traces)
-
-    token = get_token(USER_ADMIN_EMAIL, USER_ADMIN_PASSWORD)
-
-    payload = {
-        "type": "builder_query",
-        "spec": {
-            "name": "A",
-            "signal": "traces",
-            "selectFields": select_fields,
-            "order": [{"key": {"name": "timestamp"}, "direction": "desc"}],
-            "limit": 1,
-        },
-    }
-
-    response = make_query_request(
-        signoz,
-        token,
-        start_ms=int(
-            (datetime.now(tz=UTC) - timedelta(minutes=5)).timestamp() * 1000
-        ),
-        end_ms=int(datetime.now(tz=UTC).timestamp() * 1000),
-        request_type="raw",
-        queries=[payload],
-    )
-    assert response.status_code == status_code
-
-    if response.status_code == HTTPStatus.OK:
-        data = response.json()
-        assert len(data["data"]["data"]["results"][0]["rows"][0]["data"].keys()) == len(
-            expected_keys
-        )
-        assert set(data["data"]["data"]["results"][0]["rows"][0]["data"].keys()) == set(
-            expected_keys
-        )
-
-
 @pytest.mark.parametrize(
     "order_by,aggregation_alias,expected_status",
     [