fix: improve light mode text color for selected values in query builder (#9876)

In light mode, selected values in query builder Select components appeared
disabled due to inheriting light-colored text from dark mode styles.

This fix adds explicit text color (--text-ink-400) for .ant-select-selection-item
elements in light mode across QueryBuilder, QueryBuilderV2, and
MetricsAggregateSection styles.

Fixes #9801

Signed-off-by: majiayu000 <1835304752@qq.com>
Co-authored-by: Srikanth Chekuri <srikanth.chekuri92@gmail.com>

docs/api/openapi.yml

@@ -853,7 +853,7 @@ paths:
     get:
       deprecated: false
       description: This endpoints promotes and indexes paths
-      operationId: PromotePaths
+      operationId: ListPromotedAndIndexedPaths
       responses:
         "200":
           content:
@@ -883,13 +883,11 @@ paths:
           description: Internal Server Error
       summary: Promote and index paths
       tags:
-      - promoted_paths
       - logs
-      - json_logs
     post:
       deprecated: false
       description: This endpoints promotes and indexes paths
-      operationId: PromotePaths
+      operationId: HandlePromoteAndIndexPaths
       requestBody:
         content:
           application/json:
@@ -915,9 +913,7 @@ paths:
           description: Internal Server Error
       summary: Promote and index paths
       tags:
-      - promoted_paths
       - logs
-      - json_logs
   /api/v1/org/preferences:
     get:
       deprecated: false

frontend/src/api/metricsExplorer/v2/getMetricMetadata.ts

@@ -0,0 +1,29 @@
+import { ApiV2Instance as axios } from 'api';
+import { ErrorResponseHandlerV2 } from 'api/ErrorResponseHandlerV2';
+import { AxiosError } from 'axios';
+import { ErrorResponseV2, ErrorV2Resp, SuccessResponseV2 } from 'types/api';
+import { MetricMetadataResponse } from 'types/api/metricsExplorer/v2/getMetricMetadata';
+
+export const getMetricMetadata = async (
+	metricName: string,
+	signal?: AbortSignal,
+	headers?: Record<string, string>,
+): Promise<SuccessResponseV2<MetricMetadataResponse> | ErrorResponseV2> => {
+	try {
+		const encodedMetricName = encodeURIComponent(metricName);
+		const response = await axios.get(
+			`/metrics/metadata?metricName=${encodedMetricName}`,
+			{
+				signal,
+				headers,
+			},
+		);
+
+		return {
+			httpStatusCode: response.status,
+			data: response.data,
+		};
+	} catch (error) {
+		return ErrorResponseHandlerV2(error as AxiosError<ErrorV2Resp>);
+	}
+};

frontend/src/components/InputWithLabel/InputWithLabel.styles.scss

@@ -50,13 +50,6 @@
 			color: var(--bg-vanilla-400) !important;
 			font-size: 12px !important;
 		}
-		&[type='number']::-webkit-inner-spin-button,
-		&[type='number']::-webkit-outer-spin-button {
-			-webkit-appearance: none;
-			-moz-appearance: none;
-			appearance: none;
-			margin: 0;
-		}
 	}
 
 	.close-btn {

frontend/src/components/QueryBuilderV2/QueryBuilderV2.styles.scss

@@ -560,6 +560,10 @@
 					border: 1px solid var(--bg-vanilla-300) !important;
 					background: var(--bg-vanilla-100) !important;
 					box-shadow: 0px 0px 8px 0px rgba(0, 0, 0, 0.1) !important;
+
+					.ant-select-selection-item {
+						color: var(--text-ink-400);
+					}
 				}
 			}
 		}
@@ -569,6 +573,10 @@
 				border: 1px solid var(--bg-vanilla-300) !important;
 				background: var(--bg-vanilla-100) !important;
 				box-shadow: 0px 0px 8px 0px rgba(0, 0, 0, 0.1) !important;
+
+				.ant-select-selection-item {
+					color: var(--text-ink-400);
+				}
 			}
 
 			.ant-select-arrow {

frontend/src/components/QueryBuilderV2/QueryV2/MerticsAggregateSection/MetricsAggregateSection.styles.scss

@@ -169,6 +169,10 @@
 					.ant-select-selector {
 						border: 1px solid var(--bg-vanilla-300) !important;
 						background: var(--bg-vanilla-100) !important;
+
+						.ant-select-selection-item {
+							color: var(--text-ink-400);
+						}
 					}
 				}
 			}

frontend/src/components/QueryBuilderV2/QueryV2/QueryAddOns/QueryAddOns.tsx

@@ -32,6 +32,7 @@ const ADD_ONS_KEYS = {
 	ORDER_BY: 'order_by',
 	LIMIT: 'limit',
 	LEGEND_FORMAT: 'legend_format',
+	REDUCE_TO: 'reduce_to',
 };
 
 const ADD_ONS_KEYS_TO_QUERY_PATH = {
@@ -40,13 +41,14 @@ const ADD_ONS_KEYS_TO_QUERY_PATH = {
 	[ADD_ONS_KEYS.ORDER_BY]: 'orderBy',
 	[ADD_ONS_KEYS.LIMIT]: 'limit',
 	[ADD_ONS_KEYS.LEGEND_FORMAT]: 'legend',
+	[ADD_ONS_KEYS.REDUCE_TO]: 'reduceTo',
 };
 
 const ADD_ONS = [
 	{
 		icon: <BarChart2 size={14} />,
 		label: 'Group By',
-		key: 'group_by',
+		key: ADD_ONS_KEYS.GROUP_BY,
 		description:
 			'Break down data by attributes like service name, endpoint, status code, or region. Essential for spotting patterns and comparing performance across different segments.',
 		docLink: 'https://signoz.io/docs/userguide/query-builder-v5/#grouping',
@@ -54,7 +56,7 @@ const ADD_ONS = [
 	{
 		icon: <ScrollText size={14} />,
 		label: 'Having',
-		key: 'having',
+		key: ADD_ONS_KEYS.HAVING,
 		description:
 			'Filter grouped results based on aggregate conditions. Show only groups meeting specific criteria, like error rates > 5% or p99 latency > 500',
 		docLink:
@@ -63,7 +65,7 @@ const ADD_ONS = [
 	{
 		icon: <ScrollText size={14} />,
 		label: 'Order By',
-		key: 'order_by',
+		key: ADD_ONS_KEYS.ORDER_BY,
 		description:
 			'Sort results to surface what matters most. Quickly identify slowest operations, most frequent errors, or highest resource consumers.',
 		docLink:
@@ -72,7 +74,7 @@ const ADD_ONS = [
 	{
 		icon: <ScrollText size={14} />,
 		label: 'Limit',
-		key: 'limit',
+		key: ADD_ONS_KEYS.LIMIT,
 		description:
 			'Show only the top/bottom N results. Perfect for focusing on outliers, reducing noise, and improving dashboard performance.',
 		docLink:
@@ -81,7 +83,7 @@ const ADD_ONS = [
 	{
 		icon: <ScrollText size={14} />,
 		label: 'Legend format',
-		key: 'legend_format',
+		key: ADD_ONS_KEYS.LEGEND_FORMAT,
 		description:
 			'Customize series labels using variables like {{service.name}}-{{endpoint}}. Makes charts readable at a glance during incident investigation.',
 		docLink:
@@ -92,7 +94,7 @@ const ADD_ONS = [
 const REDUCE_TO = {
 	icon: <ScrollText size={14} />,
 	label: 'Reduce to',
-	key: 'reduce_to',
+	key: ADD_ONS_KEYS.REDUCE_TO,
 	description:
 		'Apply mathematical operations like sum, average, min, max, or percentiles to reduce multiple time series into a single value.',
 	docLink:
@@ -218,10 +220,9 @@ function QueryAddOns({
 		);
 
 		const availableAddOnKeys = new Set(filteredAddOns.map((addOn) => addOn.key));
-
 		// Filter and set selected views: add-ons that are both active and available
 		setSelectedViews(
-			ADD_ONS.filter(
+			filteredAddOns.filter(
 				(addOn) =>
 					activeAddOnKeys.has(addOn.key) && availableAddOnKeys.has(addOn.key),
 			),
@@ -375,7 +376,6 @@ function QueryAddOns({
 						<div className="add-on-content" data-testid="limit-content">
 							<InputWithLabel
 								label="Limit"
-								type="number"
 								onChange={handleChangeLimit}
 								initialValue={query?.limit ?? undefined}
 								placeholder="Enter limit"

frontend/src/components/QueryBuilderV2/QueryV2/__tests__/QueryV2.test.tsx

@@ -1,118 +0,0 @@
-/* eslint-disable @typescript-eslint/explicit-function-return-type */
-/* eslint-disable react/display-name */
-import '@testing-library/jest-dom';
-
-import { jest } from '@jest/globals';
-import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
-import { useQueryOperations } from 'hooks/queryBuilder/useQueryBuilderOperations';
-import { render, screen } from 'tests/test-utils';
-import { Having, IBuilderQuery } from 'types/api/queryBuilder/queryBuilderData';
-import { UseQueryOperations } from 'types/common/operations.types';
-import { DataSource, QueryBuilderContextType } from 'types/common/queryBuilder';
-
-import { QueryV2 } from '../QueryV2';
-
-// Local mocks for domain-specific heavy child components
-jest.mock(
-	'../QueryAggregation/QueryAggregation',
-	() =>
-		function () {
-			return <div>QueryAggregation</div>;
-		},
-);
-jest.mock(
-	'../MerticsAggregateSection/MetricsAggregateSection',
-	() =>
-		function () {
-			return <div>MetricsAggregateSection</div>;
-		},
-);
-// Mock hooks
-jest.mock('hooks/queryBuilder/useQueryBuilder');
-jest.mock('hooks/queryBuilder/useQueryBuilderOperations');
-
-const mockedUseQueryBuilder = jest.mocked(useQueryBuilder);
-const mockedUseQueryOperations = jest.mocked(
-	useQueryOperations,
-) as jest.MockedFunction<UseQueryOperations>;
-
-describe('QueryV2 - base render', () => {
-	beforeEach(() => {
-		const mockCloneQuery = jest.fn() as jest.MockedFunction<
-			(type: string, q: IBuilderQuery) => void
-		>;
-
-		mockedUseQueryBuilder.mockReturnValue(({
-			// Only fields used by QueryV2
-			cloneQuery: mockCloneQuery,
-			panelType: null,
-		} as unknown) as QueryBuilderContextType);
-
-		mockedUseQueryOperations.mockReturnValue({
-			isTracePanelType: false,
-			isMetricsDataSource: false,
-			operators: [],
-			spaceAggregationOptions: [],
-			listOfAdditionalFilters: [],
-			handleChangeOperator: jest.fn(),
-			handleSpaceAggregationChange: jest.fn(),
-			handleChangeAggregatorAttribute: jest.fn(),
-			handleChangeDataSource: jest.fn(),
-			handleDeleteQuery: jest.fn(),
-			handleChangeQueryData: (jest.fn() as unknown) as ReturnType<UseQueryOperations>['handleChangeQueryData'],
-			handleChangeFormulaData: jest.fn(),
-			handleQueryFunctionsUpdates: jest.fn(),
-			listOfAdditionalFormulaFilters: [],
-		});
-	});
-
-	afterEach(() => {
-		jest.clearAllMocks();
-	});
-
-	it('renders limit input when dataSource is logs', () => {
-		const baseQuery: IBuilderQuery = {
-			queryName: 'A',
-			dataSource: DataSource.LOGS,
-			aggregateOperator: '',
-			aggregations: [],
-			timeAggregation: '',
-			spaceAggregation: '',
-			temporality: '',
-			functions: [],
-			filter: undefined,
-			filters: { items: [], op: 'AND' },
-			groupBy: [],
-			expression: '',
-			disabled: false,
-			having: [] as Having[],
-			limit: 10,
-			stepInterval: null,
-			orderBy: [],
-			legend: 'A',
-		};
-
-		render(
-			<QueryV2
-				index={0}
-				isAvailableToDisable
-				query={baseQuery}
-				version="v4"
-				onSignalSourceChange={jest.fn() as jest.MockedFunction<(v: string) => void>}
-				signalSourceChangeEnabled={false}
-				queriesCount={1}
-				showTraceOperator={false}
-				hasTraceOperator={false}
-			/>,
-		);
-
-		// Ensure the Limit add-on input is present and is of type number
-		const limitInput = screen.getByPlaceholderText(
-			'Enter limit',
-		) as HTMLInputElement;
-		expect(limitInput).toBeInTheDocument();
-		expect(limitInput).toHaveAttribute('type', 'number');
-		expect(limitInput).toHaveAttribute('name', 'limit');
-		expect(limitInput).toHaveAttribute('data-testid', 'input-Limit');
-	});
-});

frontend/src/components/QueryBuilderV2/__tests__/QueryAddOns.test.tsx

@@ -1,6 +1,12 @@
 /* eslint-disable */
-import { fireEvent, render, screen } from '@testing-library/react';
-import React from 'react';
+import {
+	fireEvent,
+	render,
+	screen,
+	userEvent,
+	waitFor,
+	within,
+} from 'tests/test-utils';
 
 import QueryAddOns from '../QueryV2/QueryAddOns/QueryAddOns';
 import { PANEL_TYPES } from 'constants/queryBuilder';
@@ -55,16 +61,7 @@ jest.mock('../QueryV2/QueryAddOns/HavingFilter/HavingFilter', () => ({
 	),
 }));
 
-jest.mock(
-	'container/QueryBuilder/filters/ReduceToFilter/ReduceToFilter',
-	() => ({
-		ReduceToFilter: ({ onChange }: any) => (
-			<button data-testid="reduce-to" onClick={() => onChange('sum')}>
-				ReduceToFilter
-			</button>
-		),
-	}),
-);
+// ReduceToFilter is not mocked - we test the actual Ant Design Select component
 
 function baseQuery(overrides: Partial<any> = {}): any {
 	return {
@@ -140,7 +137,7 @@ describe('QueryAddOns', () => {
 		expect(screen.getByTestId('order-by-content')).toBeInTheDocument();
 	});
 
-	it('limit input auto-opens when limit is set and changing it calls handler', () => {
+	it('limit input auto-opens when limit is set and changing it calls handler', async () => {
 		render(
 			<QueryAddOns
 				query={baseQuery({ limit: 5 })}
@@ -183,4 +180,88 @@ describe('QueryAddOns', () => {
 		expect(screen.getByTestId('limit-content')).toBeInTheDocument();
 		expect(limitInput.value).toBe('7');
 	});
+
+	it('shows reduce-to add-on when showReduceTo is true', () => {
+		render(
+			<QueryAddOns
+				query={baseQuery()}
+				version="v5"
+				isListViewPanel={false}
+				showReduceTo
+				panelType={PANEL_TYPES.TIME_SERIES}
+				index={0}
+				isForTraceOperator={false}
+			/>,
+		);
+
+		expect(screen.getByTestId('query-add-on-reduce_to')).toBeInTheDocument();
+	});
+
+	it('auto-opens reduce-to content when reduceTo is set', () => {
+		render(
+			<QueryAddOns
+				query={baseQuery({ reduceTo: 'sum' })}
+				version="v5"
+				isListViewPanel={false}
+				showReduceTo
+				panelType={PANEL_TYPES.TIME_SERIES}
+				index={0}
+				isForTraceOperator={false}
+			/>,
+		);
+
+		expect(screen.getByTestId('reduce-to-content')).toBeInTheDocument();
+	});
+
+	it('calls handleSetQueryData when reduce-to value changes', async () => {
+		const user = userEvent.setup({ pointerEventsCheck: 0 });
+		const query = baseQuery({
+			reduceTo: 'avg',
+			aggregations: [{ id: 'a', operator: 'count', reduceTo: 'avg' }],
+		});
+		render(
+			<QueryAddOns
+				query={query}
+				version="v5"
+				isListViewPanel={false}
+				showReduceTo
+				panelType={PANEL_TYPES.TIME_SERIES}
+				index={0}
+				isForTraceOperator={false}
+			/>,
+		);
+
+		// Wait for the reduce-to content section to be visible (it auto-opens when reduceTo is set)
+		await waitFor(() => {
+			expect(screen.getByTestId('reduce-to-content')).toBeInTheDocument();
+		});
+
+		// Get the Select component by its role (combobox)
+		// The Select is within the reduce-to-content section
+		const reduceToContent = screen.getByTestId('reduce-to-content');
+		const selectCombobox = within(reduceToContent).getByRole('combobox');
+
+		// Open the dropdown by clicking on the combobox
+		await user.click(selectCombobox);
+
+		// Wait for the dropdown listbox to appear
+		await screen.findByRole('listbox');
+
+		// Find and click the "Sum" option
+		const sumOption = await screen.findByText('Sum of values in timeframe');
+		await user.click(sumOption);
+
+		// Verify the handler was called with the correct value
+		await waitFor(() => {
+			expect(mockHandleSetQueryData).toHaveBeenCalledWith(0, {
+				...query,
+				aggregations: [
+					{
+						...(query.aggregations?.[0] as any),
+						reduceTo: 'sum',
+					},
+				],
+			});
+		});
+	});
 });

frontend/src/constants/reactQueryKeys.ts

@@ -55,6 +55,7 @@ export const REACT_QUERY_KEY = {
 	GET_METRIC_DETAILS: 'GET_METRIC_DETAILS',
 	GET_RELATED_METRICS: 'GET_RELATED_METRICS',
 	GET_INSPECT_METRICS_DETAILS: 'GET_INSPECT_METRICS_DETAILS',
+	GET_METRIC_METADATA: 'GET_METRIC_METADATA',
 
 	// Traces Funnels Query Keys
 	GET_DOMAINS_LIST: 'GET_DOMAINS_LIST',

frontend/src/container/GridCardLayout/GridCard/FullView/index.tsx

@@ -120,7 +120,6 @@ function FullView({
 				originalGraphType: selectedPanelType,
 			};
 		}
-		updatedQuery.builder.queryData[0].pageSize = 10;
 		return {
 			query: updatedQuery,
 			graphType: PANEL_TYPES.LIST,

frontend/src/container/GridCardLayout/GridCard/index.tsx

@@ -137,7 +137,6 @@ function GridCardGraph({
 				originalGraphType: widget.panelTypes,
 			};
 		}
-		updatedQuery.builder.queryData[0].pageSize = 10;
 		const initialDataSource = updatedQuery.builder.queryData[0].dataSource;
 		return {
 			query: updatedQuery,

frontend/src/container/MetricsExplorer/Explorer/Explorer.styles.scss

@@ -58,6 +58,27 @@
 	.explore-content {
 		padding: 0 8px;
 
+		.y-axis-unit-selector-container {
+			display: flex;
+			align-items: center;
+			gap: 10px;
+			padding-top: 10px;
+			margin-bottom: 10px;
+
+			.save-unit-container {
+				display: flex;
+				align-items: center;
+				gap: 10px;
+
+				.ant-btn {
+					border-radius: 2px;
+					.ant-typography {
+						font-size: 12px;
+					}
+				}
+			}
+		}
+
 		.ant-space {
 			margin-top: 10px;
 			margin-bottom: 20px;
@@ -75,6 +96,14 @@
 		.time-series-view {
 			min-width: 100%;
 			width: 100%;
+			position: relative;
+
+			.no-unit-warning {
+				position: absolute;
+				top: 30px;
+				right: 40px;
+				z-index: 1000;
+			}
 		}
 
 		.time-series-container {

frontend/src/container/MetricsExplorer/Explorer/Explorer.tsx

@@ -1,7 +1,7 @@
 import './Explorer.styles.scss';
 
 import * as Sentry from '@sentry/react';
-import { Switch } from 'antd';
+import { Switch, Tooltip } from 'antd';
 import logEvent from 'api/common/logEvent';
 import { QueryBuilderV2 } from 'components/QueryBuilderV2/QueryBuilderV2';
 import WarningPopover from 'components/WarningPopover/WarningPopover';
@@ -25,10 +25,14 @@ import { generateExportToDashboardLink } from 'utils/dashboard/generateExportToD
 import { v4 as uuid } from 'uuid';
 
 import { MetricsExplorerEventKeys, MetricsExplorerEvents } from '../events';
-// import QuerySection from './QuerySection';
+import MetricDetails from '../MetricDetails/MetricDetails';
 import TimeSeries from './TimeSeries';
 import { ExplorerTabs } from './types';
-import { splitQueryIntoOneChartPerQuery } from './utils';
+import {
+	getMetricUnits,
+	splitQueryIntoOneChartPerQuery,
+	useGetMetrics,
+} from './utils';
 
 const ONE_CHART_PER_QUERY_ENABLED_KEY = 'isOneChartPerQueryEnabled';
 
@@ -40,6 +44,34 @@ function Explorer(): JSX.Element {
 		currentQuery,
 	} = useQueryBuilder();
 	const { safeNavigate } = useSafeNavigate();
+	const [isMetricDetailsOpen, setIsMetricDetailsOpen] = useState(false);
+
+	const metricNames = useMemo(() => {
+		const currentMetricNames: string[] = [];
+		stagedQuery?.builder.queryData.forEach((query) => {
+			if (query.aggregateAttribute?.key) {
+				currentMetricNames.push(query.aggregateAttribute?.key);
+			}
+		});
+		return currentMetricNames;
+	}, [stagedQuery]);
+
+	const {
+		metrics,
+		isLoading: isMetricUnitsLoading,
+		isError: isMetricUnitsError,
+	} = useGetMetrics(metricNames);
+
+	const units = useMemo(() => getMetricUnits(metrics), [metrics]);
+
+	const areAllMetricUnitsSame = useMemo(
+		() =>
+			!isMetricUnitsLoading &&
+			!isMetricUnitsError &&
+			units.length > 0 &&
+			units.every((unit) => unit && unit === units[0]),
+		[units, isMetricUnitsLoading, isMetricUnitsError],
+	);
 
 	const [searchParams, setSearchParams] = useSearchParams();
 	const isOneChartPerQueryEnabled =
@@ -48,7 +80,66 @@ function Explorer(): JSX.Element {
 	const [showOneChartPerQuery, toggleShowOneChartPerQuery] = useState(
 		isOneChartPerQueryEnabled,
 	);
+	const [disableOneChartPerQuery, toggleDisableOneChartPerQuery] = useState(
+		false,
+	);
 	const [selectedTab] = useState<ExplorerTabs>(ExplorerTabs.TIME_SERIES);
+	const [yAxisUnit, setYAxisUnit] = useState<string | undefined>();
+
+	const unitsLength = useMemo(() => units.length, [units]);
+	const firstUnit = useMemo(() => units?.[0], [units]);
+
+	useEffect(() => {
+		// Set the y axis unit to the first metric unit if
+		// 1. There is one metric unit and it is not empty
+		// 2. All metric units are the same and not empty
+		// Else, set the y axis unit to empty if
+		// 1. There are more than one metric units and they are not the same
+		// 2. There are no metric units
+		// 3. There is exactly one metric unit but it is empty/undefined
+		if (unitsLength === 0) {
+			setYAxisUnit(undefined);
+		} else if (unitsLength === 1 && firstUnit) {
+			setYAxisUnit(firstUnit);
+		} else if (unitsLength === 1 && !firstUnit) {
+			setYAxisUnit(undefined);
+		} else if (areAllMetricUnitsSame) {
+			if (firstUnit) {
+				setYAxisUnit(firstUnit);
+			} else {
+				setYAxisUnit(undefined);
+			}
+		} else if (unitsLength > 1 && !areAllMetricUnitsSame) {
+			setYAxisUnit(undefined);
+		}
+	}, [unitsLength, firstUnit, areAllMetricUnitsSame]);
+
+	useEffect(() => {
+		// Don't apply logic during loading to avoid overwriting user preferences
+		if (isMetricUnitsLoading) {
+			return;
+		}
+
+		// Disable one chart per query if -
+		// 1. There are more than one metric
+		// 2. The metric units are not the same
+		if (units.length > 1 && !areAllMetricUnitsSame) {
+			toggleShowOneChartPerQuery(true);
+			toggleDisableOneChartPerQuery(true);
+		} else if (units.length <= 1) {
+			toggleShowOneChartPerQuery(false);
+			toggleDisableOneChartPerQuery(true);
+		} else {
+			// When units are the same and loading is complete, restore URL-based preference
+			toggleShowOneChartPerQuery(isOneChartPerQueryEnabled);
+			toggleDisableOneChartPerQuery(false);
+		}
+	}, [
+		units,
+		areAllMetricUnitsSame,
+		isMetricUnitsLoading,
+		isOneChartPerQueryEnabled,
+	]);
 
 	const handleToggleShowOneChartPerQuery = (): void => {
 		toggleShowOneChartPerQuery(!showOneChartPerQuery);
@@ -68,15 +159,20 @@ function Explorer(): JSX.Element {
 		[updateAllQueriesOperators],
 	);
 
-	const exportDefaultQuery = useMemo(
-		() =>
-			updateAllQueriesOperators(
-				currentQuery || initialQueriesMap[DataSource.METRICS],
-				PANEL_TYPES.TIME_SERIES,
-				DataSource.METRICS,
-			),
-		[currentQuery, updateAllQueriesOperators],
-	);
+	const exportDefaultQuery = useMemo(() => {
+		const query = updateAllQueriesOperators(
+			currentQuery || initialQueriesMap[DataSource.METRICS],
+			PANEL_TYPES.TIME_SERIES,
+			DataSource.METRICS,
+		);
+		if (yAxisUnit && !query.unit) {
+			return {
+				...query,
+				unit: yAxisUnit,
+			};
+		}
+		return query;
+	}, [currentQuery, updateAllQueriesOperators, yAxisUnit]);
 
 	useShareBuilderUrl({ defaultValue: defaultQuery });
 
@@ -90,8 +186,16 @@ function Explorer(): JSX.Element {
 
 			const widgetId = uuid();
 
+			let query = queryToExport || exportDefaultQuery;
+			if (yAxisUnit && !query.unit) {
+				query = {
+					...query,
+					unit: yAxisUnit,
+				};
+			}
+
 			const dashboardEditView = generateExportToDashboardLink({
-				query: queryToExport || exportDefaultQuery,
+				query,
 				panelType: PANEL_TYPES.TIME_SERIES,
 				dashboardId: dashboard.id,
 				widgetId,
@@ -99,17 +203,33 @@ function Explorer(): JSX.Element {
 
 			safeNavigate(dashboardEditView);
 		},
-		[exportDefaultQuery, safeNavigate],
+		[exportDefaultQuery, safeNavigate, yAxisUnit],
 	);
 
 	const splitedQueries = useMemo(
 		() =>
 			splitQueryIntoOneChartPerQuery(
 				stagedQuery || initialQueriesMap[DataSource.METRICS],
+				metricNames,
+				units,
 			),
-		[stagedQuery],
+		[stagedQuery, metricNames, units],
 	);
 
+	const [selectedMetricName, setSelectedMetricName] = useState<string | null>(
+		null,
+	);
+
+	const handleOpenMetricDetails = (metricName: string): void => {
+		setIsMetricDetailsOpen(true);
+		setSelectedMetricName(metricName);
+	};
+
+	const handleCloseMetricDetails = (): void => {
+		setIsMetricDetailsOpen(false);
+		setSelectedMetricName(null);
+	};
+
 	useEffect(() => {
 		logEvent(MetricsExplorerEvents.TabChanged, {
 			[MetricsExplorerEventKeys.Tab]: 'explorer',
@@ -123,17 +243,44 @@ function Explorer(): JSX.Element {
 
 	const [warning, setWarning] = useState<Warning | undefined>(undefined);
 
+	const oneChartPerQueryDisabledTooltip = useMemo(() => {
+		if (splitedQueries.length <= 1) {
+			return 'One chart per query cannot be toggled for a single query.';
+		}
+		if (units.length <= 1) {
+			return 'One chart per query cannot be toggled when there is only one metric.';
+		}
+		if (disableOneChartPerQuery) {
+			return 'One chart per query cannot be disabled for multiple queries with different units.';
+		}
+		return undefined;
+	}, [disableOneChartPerQuery, splitedQueries.length, units.length]);
+
+	// Show the y axis unit selector if -
+	// 1. There is only one metric
+	// 2. The metric has no saved unit
+	const showYAxisUnitSelector = useMemo(
+		() => !isMetricUnitsLoading && units.length === 1 && !units[0],
+		[units, isMetricUnitsLoading],
+	);
+
 	return (
 		<Sentry.ErrorBoundary fallback={<ErrorBoundaryFallback />}>
 			<div className="metrics-explorer-explore-container">
 				<div className="explore-header">
 					<div className="explore-header-left-actions">
 						<span>1 chart/query</span>
-						<Switch
-							checked={showOneChartPerQuery}
-							onChange={handleToggleShowOneChartPerQuery}
-							size="small"
-						/>
+						<Tooltip
+							open={disableOneChartPerQuery ? undefined : false}
+							title={oneChartPerQueryDisabledTooltip}
+						>
+							<Switch
+								checked={showOneChartPerQuery}
+								onChange={handleToggleShowOneChartPerQuery}
+								disabled={disableOneChartPerQuery || splitedQueries.length <= 1}
+								size="small"
+							/>
+						</Tooltip>
 					</div>
 					<div className="explore-header-right-actions">
 						{!isEmpty(warning) && <WarningPopover warningData={warning} />}
@@ -174,6 +321,16 @@ function Explorer(): JSX.Element {
 						<TimeSeries
 							showOneChartPerQuery={showOneChartPerQuery}
 							setWarning={setWarning}
+							areAllMetricUnitsSame={areAllMetricUnitsSame}
+							isMetricUnitsLoading={isMetricUnitsLoading}
+							isMetricUnitsError={isMetricUnitsError}
+							metricUnits={units}
+							metricNames={metricNames}
+							metrics={metrics}
+							handleOpenMetricDetails={handleOpenMetricDetails}
+							yAxisUnit={yAxisUnit}
+							setYAxisUnit={setYAxisUnit}
+							showYAxisUnitSelector={showYAxisUnitSelector}
 						/>
 					)}
 					{/* TODO: Enable once we have resolved all related metrics issues */}
@@ -187,9 +344,17 @@ function Explorer(): JSX.Element {
 				query={exportDefaultQuery}
 				sourcepage={DataSource.METRICS}
 				onExport={handleExport}
-				isOneChartPerQuery={false}
+				isOneChartPerQuery={showOneChartPerQuery}
 				splitedQueries={splitedQueries}
 			/>
+			{isMetricDetailsOpen && (
+				<MetricDetails
+					metricName={selectedMetricName}
+					isOpen={isMetricDetailsOpen}
+					onClose={handleCloseMetricDetails}
+					isModalTimeSelection={false}
+				/>
+			)}
 		</Sentry.ErrorBoundary>
 	);
 }

frontend/src/container/MetricsExplorer/Explorer/TimeSeries.tsx

@@ -1,14 +1,18 @@
+import { Color } from '@signozhq/design-tokens';
+import { Tooltip, Typography } from 'antd';
 import { isAxiosError } from 'axios';
 import classNames from 'classnames';
+import YAxisUnitSelector from 'components/YAxisUnitSelector';
+import { YAxisSource } from 'components/YAxisUnitSelector/types';
 import { ENTITY_VERSION_V5 } from 'constants/app';
 import { initialQueriesMap, PANEL_TYPES } from 'constants/queryBuilder';
 import { REACT_QUERY_KEY } from 'constants/reactQueryKeys';
-import { BuilderUnitsFilter } from 'container/QueryBuilder/filters/BuilderUnitsFilter/BuilderUnits';
 import TimeSeriesView from 'container/TimeSeriesView/TimeSeriesView';
 import { convertDataValueToMs } from 'container/TimeSeriesView/utils';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import { GetMetricQueryRange } from 'lib/dashboard/getQueryResults';
-import { useMemo, useState } from 'react';
+import { AlertTriangle } from 'lucide-react';
+import { useMemo } from 'react';
 import { useQueries } from 'react-query';
 import { useSelector } from 'react-redux';
 import { AppState } from 'store/reducers';
@@ -24,6 +28,13 @@ import { splitQueryIntoOneChartPerQuery } from './utils';
 function TimeSeries({
 	showOneChartPerQuery,
 	setWarning,
+	isMetricUnitsLoading,
+	metricUnits,
+	metricNames,
+	handleOpenMetricDetails,
+	yAxisUnit,
+	setYAxisUnit,
+	showYAxisUnitSelector,
 }: TimeSeriesProps): JSX.Element {
 	const { stagedQuery, currentQuery } = useQueryBuilder();
 
@@ -56,13 +67,14 @@ function TimeSeries({
 			showOneChartPerQuery
 				? splitQueryIntoOneChartPerQuery(
 						stagedQuery || initialQueriesMap[DataSource.METRICS],
+						metricNames,
+						metricUnits,
 				  )
 				: [stagedQuery || initialQueriesMap[DataSource.METRICS]],
-		[showOneChartPerQuery, stagedQuery],
+		// eslint-disable-next-line react-hooks/exhaustive-deps
+		[showOneChartPerQuery, stagedQuery, JSON.stringify(metricUnits)],
 	);
 
-	const [yAxisUnit, setYAxisUnit] = useState<string>('');
-
 	const queries = useQueries(
 		queryPayloads.map((payload, index) => ({
 			queryKey: [
@@ -126,32 +138,148 @@ function TimeSeries({
 		setYAxisUnit(value);
 	};
 
+	// TODO: Enable once we have resolved all related metrics v2 api issues
+	// Show the save unit button if
+	// 1. There is only one metric
+	// 2. The metric has no saved unit
+	// 3. The user has selected a unit
+	// const showSaveUnitButton = useMemo(
+	// 	() =>
+	// 		metricUnits.length === 1 &&
+	// 		Boolean(metrics?.[0]) &&
+	// 		!metricUnits[0] &&
+	// 		yAxisUnit,
+	// 	[metricUnits, metrics, yAxisUnit],
+	// );
+
+	// const {
+	// 	mutate: updateMetricMetadata,
+	// 	isLoading: isUpdatingMetricMetadata,
+	// } = useUpdateMetricMetadata();
+
+	// const handleSaveUnit = (): void => {
+	// 	updateMetricMetadata(
+	// 		{
+	// 			metricName: metricNames[0],
+	// 			payload: {
+	// 				unit: yAxisUnit,
+	// 				description: metrics[0]?.description ?? '',
+	// 				metricType: metrics[0]?.type as MetricType,
+	// 				temporality: metrics[0]?.temporality,
+	// 			},
+	// 		},
+	// 		{
+	// 			onSuccess: () => {
+	// 				notifications.success({
+	// 					message: 'Unit saved successfully',
+	// 				});
+	// 				queryClient.invalidateQueries([
+	// 					REACT_QUERY_KEY.GET_METRIC_DETAILS,
+	// 					metricNames[0],
+	// 				]);
+	// 			},
+	// 			onError: () => {
+	// 				notifications.error({
+	// 					message: 'Failed to save unit',
+	// 				});
+	// 			},
+	// 		},
+	// 	);
+	// };
+
 	return (
 		<>
-			<BuilderUnitsFilter onChange={onUnitChangeHandler} yAxisUnit={yAxisUnit} />
+			<div className="y-axis-unit-selector-container">
+				{showYAxisUnitSelector && (
+					<>
+						<YAxisUnitSelector
+							onChange={onUnitChangeHandler}
+							value={yAxisUnit}
+							source={YAxisSource.EXPLORER}
+							data-testid="y-axis-unit-selector"
+						/>
+						{/* TODO: Enable once we have resolved all related metrics v2 api issues */}
+						{/* {showSaveUnitButton && (
+							<div className="save-unit-container">
+								<Typography.Text>
+									Save the selected unit for this metric?
+								</Typography.Text>
+								<Button
+									type="primary"
+									size="small"
+									disabled={isUpdatingMetricMetadata}
+									onClick={handleSaveUnit}
+								>
+									<Typography.Paragraph>Yes</Typography.Paragraph>
+								</Button>
+							</div>
+						)} */}
+					</>
+				)}
+			</div>
 			<div
 				className={classNames({
 					'time-series-container': changeLayoutForOneChartPerQuery,
 				})}
 			>
-				{responseData.map((datapoint, index) => (
-					<div
-						className="time-series-view"
-						// eslint-disable-next-line react/no-array-index-key
-						key={index}
-					>
-						<TimeSeriesView
-							isFilterApplied={false}
-							isError={queries[index].isError}
-							isLoading={queries[index].isLoading}
-							data={datapoint}
-							yAxisUnit={yAxisUnit}
-							dataSource={DataSource.METRICS}
-							error={queries[index].error as APIError}
-							setWarning={setWarning}
-						/>
-					</div>
-				))}
+				{responseData.map((datapoint, index) => {
+					const isQueryDataItem = index < metricNames.length;
+					const metricName = isQueryDataItem ? metricNames[index] : undefined;
+					const metricUnit = isQueryDataItem ? metricUnits[index] : undefined;
+
+					// Show the no unit warning if -
+					// 1. The metric query is not loading
+					// 2. The metric units are not loading
+					// 3. There are more than one metric
+					// 4. The current metric unit is empty
+					// 5. Is a queryData item
+					const isMetricUnitEmpty =
+						isQueryDataItem &&
+						!queries[index].isLoading &&
+						!isMetricUnitsLoading &&
+						metricUnits.length > 1 &&
+						!metricUnit &&
+						metricName;
+
+					const currentYAxisUnit = yAxisUnit || metricUnit;
+
+					return (
+						<div
+							className="time-series-view"
+							// eslint-disable-next-line react/no-array-index-key
+							key={index}
+						>
+							{isMetricUnitEmpty && metricName && (
+								<Tooltip
+									className="no-unit-warning"
+									title={
+										<Typography.Text>
+											This metric does not have a unit. Please set one for it in the{' '}
+											<Typography.Link
+												onClick={(): void => handleOpenMetricDetails(metricName)}
+											>
+												metric details
+											</Typography.Link>{' '}
+											page.
+										</Typography.Text>
+									}
+								>
+									<AlertTriangle size={16} color={Color.BG_AMBER_400} />
+								</Tooltip>
+							)}
+							<TimeSeriesView
+								isFilterApplied={false}
+								isError={queries[index].isError}
+								isLoading={queries[index].isLoading || isMetricUnitsLoading}
+								data={datapoint}
+								yAxisUnit={currentYAxisUnit}
+								dataSource={DataSource.METRICS}
+								error={queries[index].error as APIError}
+								setWarning={setWarning}
+							/>
+						</div>
+					);
+				})}
 			</div>
 		</>
 	);

frontend/src/container/MetricsExplorer/Explorer/__tests__/Explorer.test.tsx

@@ -1,4 +1,6 @@
 import { render, screen } from '@testing-library/react';
+import { Temporality } from 'api/metricsExplorer/getMetricDetails';
+import { MetricType } from 'api/metricsExplorer/getMetricsList';
 import { initialQueriesMap, PANEL_TYPES } from 'constants/queryBuilder';
 import * as useOptionsMenuHooks from 'container/OptionsMenu';
 import * as useUpdateDashboardHooks from 'hooks/dashboard/useUpdateDashboard';
@@ -12,13 +14,18 @@ import { MemoryRouter } from 'react-router-dom';
 import { useSearchParams } from 'react-router-dom-v5-compat';
 import store from 'store';
 import { LicenseEvent } from 'types/api/licensesV3/getActive';
-import { DataSource } from 'types/common/queryBuilder';
+import { MetricMetadata } from 'types/api/metricsExplorer/v2/getMetricMetadata';
+import { BaseAutocompleteData } from 'types/api/queryBuilder/queryAutocompleteResponse';
+import { DataSource, QueryBuilderContextType } from 'types/common/queryBuilder';
 
 import Explorer from '../Explorer';
+import * as useGetMetricsHooks from '../utils';
 
 const mockSetSearchParams = jest.fn();
 const queryClient = new QueryClient();
-const mockUpdateAllQueriesOperators = jest.fn();
+const mockUpdateAllQueriesOperators = jest
+	.fn()
+	.mockReturnValue(initialQueriesMap[DataSource.METRICS]);
 const mockUseQueryBuilderData = {
 	handleRunQuery: jest.fn(),
 	stagedQuery: initialQueriesMap[DataSource.METRICS],
@@ -126,6 +133,30 @@ jest.spyOn(useQueryBuilderHooks, 'useQueryBuilder').mockReturnValue({
 	...mockUseQueryBuilderData,
 } as any);
 
+const Y_AXIS_UNIT_SELECTOR_TEST_ID = 'y-axis-unit-selector';
+
+const mockMetric: MetricMetadata = {
+	type: MetricType.SUM,
+	description: 'metric1 description',
+	unit: 'metric1 unit',
+	temporality: Temporality.CUMULATIVE,
+	isMonotonic: true,
+};
+
+function renderExplorer(): void {
+	render(
+		<QueryClientProvider client={queryClient}>
+			<MemoryRouter>
+				<Provider store={store}>
+					<ErrorModalProvider>
+						<Explorer />
+					</ErrorModalProvider>
+				</Provider>
+			</MemoryRouter>
+		</QueryClientProvider>,
+	);
+}
+
 describe('Explorer', () => {
 	beforeEach(() => {
 		jest.clearAllMocks();
@@ -142,17 +173,7 @@ describe('Explorer', () => {
 			mockSetSearchParams,
 		]);
 
-		render(
-			<QueryClientProvider client={queryClient}>
-				<MemoryRouter>
-					<Provider store={store}>
-						<ErrorModalProvider>
-							<Explorer />
-						</ErrorModalProvider>
-					</Provider>
-				</MemoryRouter>
-			</QueryClientProvider>,
-		);
+		renderExplorer();
 
 		expect(mockUpdateAllQueriesOperators).toHaveBeenCalledWith(
 			initialQueriesMap[DataSource.METRICS],
@@ -166,18 +187,13 @@ describe('Explorer', () => {
 			new URLSearchParams({ isOneChartPerQueryEnabled: 'true' }),
 			mockSetSearchParams,
 		]);
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [mockMetric, mockMetric],
+		});
 
-		render(
-			<QueryClientProvider client={queryClient}>
-				<MemoryRouter>
-					<Provider store={store}>
-						<ErrorModalProvider>
-							<Explorer />
-						</ErrorModalProvider>
-					</Provider>
-				</MemoryRouter>
-			</QueryClientProvider>,
-		);
+		renderExplorer();
 
 		const toggle = screen.getByRole('switch');
 		expect(toggle).toBeChecked();
@@ -188,20 +204,132 @@ describe('Explorer', () => {
 			new URLSearchParams({ isOneChartPerQueryEnabled: 'false' }),
 			mockSetSearchParams,
 		]);
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [mockMetric, mockMetric],
+		});
 
-		render(
-			<QueryClientProvider client={queryClient}>
-				<MemoryRouter>
-					<Provider store={store}>
-						<ErrorModalProvider>
-							<Explorer />
-						</ErrorModalProvider>
-					</Provider>
-				</MemoryRouter>
-			</QueryClientProvider>,
-		);
+		renderExplorer();
 
 		const toggle = screen.getByRole('switch');
 		expect(toggle).not.toBeChecked();
 	});
+
+	it('should not render y axis unit selector for single metric which has a unit', () => {
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [mockMetric],
+		});
+
+		renderExplorer();
+
+		const yAxisUnitSelector = screen.queryByTestId(Y_AXIS_UNIT_SELECTOR_TEST_ID);
+		expect(yAxisUnitSelector).not.toBeInTheDocument();
+	});
+
+	it('should not render y axis unit selector for mutliple metrics with same unit', () => {
+		(useSearchParams as jest.Mock).mockReturnValueOnce([
+			new URLSearchParams({ isOneChartPerQueryEnabled: 'true' }),
+			mockSetSearchParams,
+		]);
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [mockMetric, mockMetric],
+		});
+
+		renderExplorer();
+
+		const yAxisUnitSelector = screen.queryByTestId(Y_AXIS_UNIT_SELECTOR_TEST_ID);
+		expect(yAxisUnitSelector).not.toBeInTheDocument();
+	});
+
+	it('should hide y axis unit selector for multiple metrics with different units', () => {
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [mockMetric, mockMetric],
+		});
+
+		renderExplorer();
+
+		const yAxisUnitSelector = screen.queryByTestId(Y_AXIS_UNIT_SELECTOR_TEST_ID);
+		expect(yAxisUnitSelector).not.toBeInTheDocument();
+
+		// One chart per query toggle should be disabled
+		const oneChartPerQueryToggle = screen.getByRole('switch');
+		expect(oneChartPerQueryToggle).toBeDisabled();
+	});
+
+	it('should render empty y axis unit selector for a single metric with no unit', () => {
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [
+				{
+					type: MetricType.SUM,
+					description: 'metric1 description',
+					unit: '',
+					temporality: Temporality.CUMULATIVE,
+					isMonotonic: true,
+				},
+			],
+		});
+
+		renderExplorer();
+
+		const yAxisUnitSelector = screen.queryByTestId(Y_AXIS_UNIT_SELECTOR_TEST_ID);
+		expect(yAxisUnitSelector).toBeInTheDocument();
+		expect(yAxisUnitSelector).toHaveTextContent('Please select a unit');
+	});
+
+	it('one chart per query should be off and disabled when there is only one query', () => {
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [mockMetric],
+		});
+
+		renderExplorer();
+
+		const oneChartPerQueryToggle = screen.getByRole('switch');
+		expect(oneChartPerQueryToggle).not.toBeChecked();
+		expect(oneChartPerQueryToggle).toBeDisabled();
+	});
+
+	it('one chart per query should enabled by default when there are multiple metrics with the same unit', () => {
+		const mockQueryData = {
+			...initialQueriesMap[DataSource.METRICS].builder.queryData[0],
+			aggregateAttribute: {
+				...(initialQueriesMap[DataSource.METRICS].builder.queryData[0]
+					.aggregateAttribute as BaseAutocompleteData),
+				key: 'metric1',
+			},
+		};
+		const mockStagedQueryWithMultipleQueries = {
+			...initialQueriesMap[DataSource.METRICS],
+			builder: {
+				...initialQueriesMap[DataSource.METRICS].builder,
+				queryData: [mockQueryData, mockQueryData],
+			},
+		};
+
+		jest.spyOn(useQueryBuilderHooks, 'useQueryBuilder').mockReturnValue(({
+			...mockUseQueryBuilderData,
+			stagedQuery: mockStagedQueryWithMultipleQueries,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		jest.spyOn(useGetMetricsHooks, 'useGetMetrics').mockReturnValue({
+			isLoading: false,
+			isError: false,
+			metrics: [mockMetric, mockMetric],
+		});
+
+		renderExplorer();
+
+		const oneChartPerQueryToggle = screen.getByRole('switch');
+		expect(oneChartPerQueryToggle).toBeEnabled();
+	});
 });

frontend/src/container/MetricsExplorer/Explorer/__tests__/TimeSeries.test.tsx

@@ -0,0 +1,180 @@
+import { render, RenderResult, screen, waitFor } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { Temporality } from 'api/metricsExplorer/getMetricDetails';
+import { MetricType } from 'api/metricsExplorer/getMetricsList';
+import { UpdateMetricMetadataResponse } from 'api/metricsExplorer/updateMetricMetadata';
+import * as useUpdateMetricMetadataHooks from 'hooks/metricsExplorer/useUpdateMetricMetadata';
+import { UseUpdateMetricMetadataProps } from 'hooks/metricsExplorer/useUpdateMetricMetadata';
+import { UseMutationResult } from 'react-query';
+import { ErrorResponse, SuccessResponse } from 'types/api';
+import { MetricMetadata } from 'types/api/metricsExplorer/v2/getMetricMetadata';
+
+import TimeSeries from '../TimeSeries';
+import { TimeSeriesProps } from '../types';
+
+type MockUpdateMetricMetadata = UseMutationResult<
+	SuccessResponse<UpdateMetricMetadataResponse> | ErrorResponse,
+	Error,
+	UseUpdateMetricMetadataProps
+>;
+const mockUpdateMetricMetadata = jest.fn();
+jest
+	.spyOn(useUpdateMetricMetadataHooks, 'useUpdateMetricMetadata')
+	.mockReturnValue(({
+		mutate: mockUpdateMetricMetadata,
+		isLoading: false,
+	} as Partial<MockUpdateMetricMetadata>) as MockUpdateMetricMetadata);
+
+jest.mock('container/TimeSeriesView/TimeSeriesView', () => ({
+	__esModule: true,
+	default: jest.fn().mockReturnValue(
+		<div role="img" aria-label="warning">
+			TimeSeriesView
+		</div>,
+	),
+}));
+
+jest.mock('react-query', () => ({
+	...jest.requireActual('react-query'),
+	useQueryClient: jest.fn().mockReturnValue({
+		invalidateQueries: jest.fn(),
+	}),
+	useQueries: jest.fn().mockImplementation((queries: any[]) =>
+		queries.map(() => ({
+			data: undefined,
+			isLoading: false,
+			isError: false,
+			error: undefined,
+		})),
+	),
+}));
+
+jest.mock('react-redux', () => ({
+	...jest.requireActual('react-redux'),
+	useSelector: jest.fn().mockReturnValue({
+		globalTime: {
+			selectedTime: '5min',
+			maxTime: 1713738000000,
+			minTime: 1713734400000,
+		},
+	}),
+}));
+
+const mockMetric: MetricMetadata = {
+	type: MetricType.SUM,
+	description: 'metric1 description',
+	unit: 'metric1 unit',
+	temporality: Temporality.CUMULATIVE,
+	isMonotonic: true,
+};
+
+const mockSetWarning = jest.fn();
+const mockSetIsMetricDetailsOpen = jest.fn();
+const mockSetYAxisUnit = jest.fn();
+
+function renderTimeSeries(
+	overrides: Partial<TimeSeriesProps> = {},
+): RenderResult {
+	return render(
+		<TimeSeries
+			showOneChartPerQuery={false}
+			setWarning={mockSetWarning}
+			areAllMetricUnitsSame={false}
+			isMetricUnitsLoading={false}
+			metricUnits={[]}
+			metricNames={[]}
+			metrics={[]}
+			isMetricUnitsError={false}
+			handleOpenMetricDetails={mockSetIsMetricDetailsOpen}
+			yAxisUnit="count"
+			setYAxisUnit={mockSetYAxisUnit}
+			showYAxisUnitSelector={false}
+			// eslint-disable-next-line react/jsx-props-no-spreading
+			{...overrides}
+		/>,
+	);
+}
+
+describe('TimeSeries', () => {
+	it('should render a warning icon when a metric has no unit among multiple metrics', () => {
+		const user = userEvent.setup();
+		const { container } = renderTimeSeries({
+			metricUnits: ['', 'count'],
+			metricNames: ['metric1', 'metric2'],
+			metrics: [undefined, undefined],
+		});
+
+		const alertIcon = container.querySelector('.no-unit-warning') as HTMLElement;
+		user.hover(alertIcon);
+		waitFor(() =>
+			expect(
+				screen.findByText('This metric does not have a unit'),
+			).toBeInTheDocument(),
+		);
+	});
+
+	it('clicking on warning icon tooltip should open metric details modal', async () => {
+		const user = userEvent.setup();
+		const { container } = renderTimeSeries({
+			metricUnits: ['', 'count'],
+			metricNames: ['metric1', 'metric2'],
+			metrics: [mockMetric, mockMetric],
+			yAxisUnit: 'seconds',
+		});
+
+		const alertIcon = container.querySelector('.no-unit-warning') as HTMLElement;
+		user.hover(alertIcon);
+
+		const metricDetailsLink = await screen.findByText('metric details');
+		user.click(metricDetailsLink);
+
+		waitFor(() =>
+			expect(mockSetIsMetricDetailsOpen).toHaveBeenCalledWith('metric1'),
+		);
+	});
+
+	// TODO: Unskip this test once the save unit button is implemented
+	// Tracking at - https://github.com/SigNoz/engineering-pod/issues/3495
+	it.skip('shows Save unit button when metric had no unit but one is selected', () => {
+		const { findByText, getByRole } = renderTimeSeries({
+			metricUnits: [undefined],
+			metricNames: ['metric1'],
+			metrics: [mockMetric],
+			yAxisUnit: 'seconds',
+		});
+
+		expect(
+			findByText('Save the selected unit for this metric?'),
+		).toBeInTheDocument();
+
+		const yesButton = getByRole('button', { name: 'Yes' });
+		expect(yesButton).toBeInTheDocument();
+		expect(yesButton).toBeEnabled();
+	});
+
+	// TODO: Unskip this test once the save unit button is implemented
+	// Tracking at - https://github.com/SigNoz/engineering-pod/issues/3495
+	it.skip('clicking on save unit button shoould upated metric metadata', () => {
+		const user = userEvent.setup();
+		const { getByRole } = renderTimeSeries({
+			metricUnits: [''],
+			metricNames: ['metric1'],
+			metrics: [mockMetric],
+			yAxisUnit: 'seconds',
+		});
+
+		const yesButton = getByRole('button', { name: /Yes/i });
+		user.click(yesButton);
+
+		expect(mockUpdateMetricMetadata).toHaveBeenCalledWith(
+			{
+				metricName: 'metric1',
+				payload: expect.objectContaining({ unit: 'seconds' }),
+			},
+			expect.objectContaining({
+				onSuccess: expect.any(Function),
+				onError: expect.any(Function),
+			}),
+		);
+	});
+});

frontend/src/container/MetricsExplorer/Explorer/__tests__/utils.test.tsx

@@ -0,0 +1,161 @@
+import { renderHook } from '@testing-library/react';
+import { Temporality } from 'api/metricsExplorer/getMetricDetails';
+import { MetricType } from 'api/metricsExplorer/getMetricsList';
+import { initialQueriesMap } from 'constants/queryBuilder';
+import * as useGetMultipleMetricsHook from 'hooks/metricsExplorer/useGetMultipleMetrics';
+import { UseQueryResult } from 'react-query';
+import { SuccessResponseV2 } from 'types/api';
+import {
+	MetricMetadata,
+	MetricMetadataResponse,
+} from 'types/api/metricsExplorer/v2/getMetricMetadata';
+import { BaseAutocompleteData } from 'types/api/queryBuilder/queryAutocompleteResponse';
+import {
+	IBuilderFormula,
+	IBuilderQuery,
+	Query,
+} from 'types/api/queryBuilder/queryBuilderData';
+import { DataSource } from 'types/common/queryBuilder';
+
+import {
+	getMetricUnits,
+	splitQueryIntoOneChartPerQuery,
+	useGetMetrics,
+} from '../utils';
+
+const MOCK_QUERY_DATA_1: IBuilderQuery = {
+	...initialQueriesMap[DataSource.METRICS].builder.queryData[0],
+	aggregateAttribute: {
+		...(initialQueriesMap[DataSource.METRICS].builder.queryData[0]
+			.aggregateAttribute as BaseAutocompleteData),
+		key: 'metric1',
+	},
+};
+
+const MOCK_QUERY_DATA_2: IBuilderQuery = {
+	...initialQueriesMap[DataSource.METRICS].builder.queryData[0],
+	aggregateAttribute: {
+		...(initialQueriesMap[DataSource.METRICS].builder.queryData[0]
+			.aggregateAttribute as BaseAutocompleteData),
+		key: 'metric2',
+	},
+};
+const MOCK_FORMULA_DATA: IBuilderFormula = {
+	expression: '1 + 1',
+	disabled: false,
+	queryName: 'Mock Formula',
+	legend: 'Mock Legend',
+};
+
+const MOCK_QUERY_WITH_MULTIPLE_QUERY_DATA: Query = {
+	...initialQueriesMap[DataSource.METRICS],
+	builder: {
+		...initialQueriesMap[DataSource.METRICS].builder,
+		queryData: [MOCK_QUERY_DATA_1, MOCK_QUERY_DATA_2],
+		queryFormulas: [MOCK_FORMULA_DATA, MOCK_FORMULA_DATA],
+	},
+};
+
+describe('splitQueryIntoOneChartPerQuery', () => {
+	it('should split a query with multiple queryData to multiple distinct queries, each with a single queryData', () => {
+		const result = splitQueryIntoOneChartPerQuery(
+			MOCK_QUERY_WITH_MULTIPLE_QUERY_DATA,
+			['metric1', 'metric2'],
+			[undefined, 'unit2'],
+		);
+		expect(result).toHaveLength(4);
+		// Verify query 1 has the correct data
+		expect(result[0].builder.queryData).toHaveLength(1);
+		expect(result[0].builder.queryData[0]).toEqual(MOCK_QUERY_DATA_1);
+		expect(result[0].builder.queryFormulas).toHaveLength(0);
+		expect(result[0].unit).toBeUndefined();
+		// Verify query 2 has the correct data
+		expect(result[1].builder.queryData).toHaveLength(1);
+		expect(result[1].builder.queryData[0]).toEqual(MOCK_QUERY_DATA_2);
+		expect(result[1].builder.queryFormulas).toHaveLength(0);
+		expect(result[1].unit).toBe('unit2');
+		// Verify query 3 has the correct data
+		expect(result[2].builder.queryFormulas).toHaveLength(1);
+		expect(result[2].builder.queryFormulas[0]).toEqual(MOCK_FORMULA_DATA);
+		expect(result[2].builder.queryData).toHaveLength(2); // 2 disabled queries
+		expect(result[2].builder.queryData[0].disabled).toBe(true);
+		expect(result[2].builder.queryData[1].disabled).toBe(true);
+		expect(result[2].unit).toBeUndefined();
+		// Verify query 4 has the correct data
+		expect(result[3].builder.queryFormulas).toHaveLength(1);
+		expect(result[3].builder.queryFormulas[0]).toEqual(MOCK_FORMULA_DATA);
+		expect(result[3].builder.queryData).toHaveLength(2); // 2 disabled queries
+		expect(result[3].builder.queryData[0].disabled).toBe(true);
+		expect(result[3].builder.queryData[1].disabled).toBe(true);
+		expect(result[3].unit).toBeUndefined();
+	});
+});
+
+const MOCK_METRIC_METADATA: MetricMetadata = {
+	description: 'Metric 1 description',
+	unit: 'unit1',
+	type: MetricType.GAUGE,
+	temporality: Temporality.DELTA,
+	isMonotonic: true,
+};
+
+describe('useGetMetrics', () => {
+	beforeEach(() => {
+		jest
+			.spyOn(useGetMultipleMetricsHook, 'useGetMultipleMetrics')
+			.mockReturnValue([
+				({
+					isLoading: false,
+					isError: false,
+					data: {
+						httpStatusCode: 200,
+						data: {
+							status: 'success',
+							data: MOCK_METRIC_METADATA,
+						},
+					},
+				} as Partial<
+					UseQueryResult<SuccessResponseV2<MetricMetadataResponse>, Error>
+				>) as UseQueryResult<SuccessResponseV2<MetricMetadataResponse>, Error>,
+			]);
+	});
+
+	it('should return the correct metrics data', () => {
+		const { result } = renderHook(() => useGetMetrics(['metric1']));
+		expect(result.current.metrics).toHaveLength(1);
+		expect(result.current.metrics[0]).toBeDefined();
+		expect(result.current.metrics[0]).toEqual(MOCK_METRIC_METADATA);
+		expect(result.current.isLoading).toBe(false);
+		expect(result.current.isError).toBe(false);
+	});
+
+	it('should return array of undefined values of correct length when metrics data is not yet loaded', () => {
+		jest
+			.spyOn(useGetMultipleMetricsHook, 'useGetMultipleMetrics')
+			.mockReturnValue([
+				({
+					isLoading: true,
+					isError: false,
+				} as Partial<
+					UseQueryResult<SuccessResponseV2<MetricMetadataResponse>, Error>
+				>) as UseQueryResult<SuccessResponseV2<MetricMetadataResponse>, Error>,
+			]);
+		const { result } = renderHook(() => useGetMetrics(['metric1']));
+		expect(result.current.metrics).toHaveLength(1);
+		expect(result.current.metrics[0]).toBeUndefined();
+	});
+});
+
+describe('getMetricUnits', () => {
+	it('should return the same unit for units that are not known to the universal unit mapper', () => {
+		const result = getMetricUnits([MOCK_METRIC_METADATA]);
+		expect(result).toHaveLength(1);
+		expect(result[0]).toEqual(MOCK_METRIC_METADATA.unit);
+	});
+
+	it('should return universal unit for units that are known to the universal unit mapper', () => {
+		const result = getMetricUnits([{ ...MOCK_METRIC_METADATA, unit: 'seconds' }]);
+		expect(result).toHaveLength(1);
+		expect(result[0]).toBe('s');
+	});
+});

frontend/src/container/MetricsExplorer/Explorer/types.ts

@@ -3,6 +3,7 @@ import { Dispatch, SetStateAction } from 'react';
 import { UseQueryResult } from 'react-query';
 import { SuccessResponse, Warning } from 'types/api';
 import { MetricRangePayloadProps } from 'types/api/metrics/getQueryRange';
+import { MetricMetadata } from 'types/api/metricsExplorer/v2/getMetricMetadata';
 
 export enum ExplorerTabs {
 	TIME_SERIES = 'time-series',
@@ -12,6 +13,16 @@ export enum ExplorerTabs {
 export interface TimeSeriesProps {
 	showOneChartPerQuery: boolean;
 	setWarning: Dispatch<SetStateAction<Warning | undefined>>;
+	areAllMetricUnitsSame: boolean;
+	isMetricUnitsLoading: boolean;
+	isMetricUnitsError: boolean;
+	metricUnits: (string | undefined)[];
+	metricNames: string[];
+	metrics: (MetricMetadata | undefined)[];
+	handleOpenMetricDetails: (metricName: string) => void;
+	yAxisUnit: string | undefined;
+	setYAxisUnit: (unit: string) => void;
+	showYAxisUnitSelector: boolean;
 }
 
 export interface RelatedMetricsProps {

frontend/src/container/MetricsExplorer/Explorer/utils.tsx

@@ -1,20 +1,40 @@
+import { mapMetricUnitToUniversalUnit } from 'components/YAxisUnitSelector/utils';
+import { useGetMultipleMetrics } from 'hooks/metricsExplorer/useGetMultipleMetrics';
+import { MetricMetadata } from 'types/api/metricsExplorer/v2/getMetricMetadata';
 import { Query } from 'types/api/queryBuilder/queryBuilderData';
 import { v4 as uuid } from 'uuid';
 
-export const splitQueryIntoOneChartPerQuery = (query: Query): Query[] => {
+/**
+ * Split a query with multiple queryData to multiple distinct queries, each with a single queryData.
+ * @param query - The query to split
+ * @param units - The units of the metrics, can be undefined if the metric has no unit
+ * @returns The split queries
+ */
+export const splitQueryIntoOneChartPerQuery = (
+	query: Query,
+	metricNames: string[],
+	units: (string | undefined)[],
+): Query[] => {
 	const queries: Query[] = [];
 
 	query.builder.queryData.forEach((currentQuery) => {
-		const newQuery = {
-			...query,
-			id: uuid(),
-			builder: {
-				...query.builder,
-				queryData: [currentQuery],
-				queryFormulas: [],
-			},
-		};
-		queries.push(newQuery);
+		if (currentQuery.aggregateAttribute?.key) {
+			const metricIndex = metricNames.indexOf(
+				currentQuery.aggregateAttribute?.key,
+			);
+			const unit = metricIndex >= 0 ? units[metricIndex] : undefined;
+			const newQuery = {
+				...query,
+				id: uuid(),
+				builder: {
+					...query.builder,
+					queryData: [currentQuery],
+					queryFormulas: [],
+				},
+				unit,
+			};
+			queries.push(newQuery);
+		}
 	});
 
 	query.builder.queryFormulas.forEach((currentFormula) => {
@@ -35,3 +55,43 @@ export const splitQueryIntoOneChartPerQuery = (query: Query): Query[] => {
 
 	return queries;
 };
+
+/**
+ * Hook to get data for multiple metrics with a synchronous loading and error state
+ * @param metricNames - The names of the metrics to get
+ * @param isEnabled - Whether the hook is enabled
+ * @returns The loading state, the metrics data, and the error state
+ */
+export function useGetMetrics(
+	metricNames: string[],
+	isEnabled = true,
+): {
+	isLoading: boolean;
+	isError: boolean;
+	metrics: (MetricMetadata | undefined)[];
+} {
+	const metricsData = useGetMultipleMetrics(metricNames, {
+		enabled: metricNames.length > 0 && isEnabled,
+	});
+	return {
+		isLoading: metricsData.some((metric) => metric.isLoading),
+		metrics: metricsData
+			.map((metric) => metric.data?.data)
+			.map((data) => data?.data),
+		isError: metricsData.some((metric) => metric.isError),
+	};
+}
+
+/**
+ * To get the units of the metrics in the universal unit standard.
+ * If the unit is not known to the universal unit mapper, it will return the unit as is.
+ * @param metrics - The metrics to get the units for
+ * @returns The units of the metrics, can be undefined if the metric has no unit
+ */
+export function getMetricUnits(
+	metrics: (MetricMetadata | undefined)[],
+): (string | undefined)[] {
+	return metrics
+		.map((metric) => metric?.unit)
+		.map((unit) => mapMetricUnitToUniversalUnit(unit) || undefined);
+}

frontend/src/container/MetricsExplorer/MetricDetails/MetricDetails.tsx

@@ -131,8 +131,8 @@ function MetricDetails({
 						>
 							Open in Explorer
 						</Button>
-						{/* Show the based on the feature flag. Will remove before releasing the feature */}
-						{showInspectFeature && (
+						{/* Show the inspect button if the metric type is GAUGE */}
+						{showInspectFeature && openInspectModal && (
 							<Button
 								className="inspect-metrics-button"
 								aria-label="Inspect Metric"

frontend/src/container/MetricsExplorer/MetricDetails/types.ts

@@ -11,7 +11,7 @@ export interface MetricDetailsProps {
 	isOpen: boolean;
 	metricName: string | null;
 	isModalTimeSelection: boolean;
-	openInspectModal: (metricName: string) => void;
+	openInspectModal?: (metricName: string) => void;
 }
 
 export interface DashboardsAndAlertsPopoverProps {

frontend/src/container/NewWidget/index.tsx

@@ -370,10 +370,6 @@ function NewWidget({
 	// this has been moved here from the left container
 	const [requestData, setRequestData] = useState<GetQueryResultsProps>(() => {
 		const updatedQuery = cloneDeep(stagedQuery || initialQueriesMap.metrics);
-		if (updatedQuery?.builder?.queryData?.[0]) {
-			updatedQuery.builder.queryData[0].pageSize = 10;
-		}
-
 		if (selectedWidget) {
 			if (selectedGraph === PANEL_TYPES.LIST) {
 				return {
@@ -419,16 +415,12 @@ function NewWidget({
 	useEffect(() => {
 		if (stagedQuery) {
 			setIsLoadingPanelData(false);
-			const updatedStagedQuery = cloneDeep(stagedQuery);
-			if (updatedStagedQuery?.builder?.queryData?.[0]) {
-				updatedStagedQuery.builder.queryData[0].pageSize = 10;
-			}
 			setRequestData((prev) => ({
 				...prev,
 				selectedTime: selectedTime.enum || prev.selectedTime,
 				globalSelectedInterval: customGlobalSelectedInterval,
 				graphType: getGraphType(selectedGraph || selectedWidget.panelTypes),
-				query: updatedStagedQuery,
+				query: stagedQuery,
 				fillGaps: selectedWidget.fillSpans || false,
 				isLogScale: selectedWidget.isLogScale || false,
 				formatForWeb:

frontend/src/container/QueryBuilder/QueryBuilder.styles.scss

@@ -206,6 +206,10 @@
 			.ant-select-selector {
 				border-color: var(--bg-vanilla-300);
 				background: var(--bg-vanilla-300);
+
+				.ant-select-selection-item {
+					color: var(--text-ink-400);
+				}
 			}
 
 			.ant-input-number {

frontend/src/container/QueryBuilder/components/Formula/Formula.tsx

@@ -242,7 +242,6 @@ export function Formula({
 								</div>
 								<InputWithLabel
 									label="Limit"
-									type="number"
 									onChange={(value): void => handleChangeLimit(Number(value))}
 									initialValue={formula?.limit ?? undefined}
 									placeholder="Enter limit"

frontend/src/container/QueryBuilder/components/SpaceAggregationOptions/SpaceAggregationOptions.tsx

@@ -1,7 +1,5 @@
 import { Select } from 'antd';
 import { ATTRIBUTE_TYPES, PANEL_TYPES } from 'constants/queryBuilder';
-import { useEffect, useState } from 'react';
-import { MetricAggregateOperator } from 'types/common/queryBuilder';
 
 interface SpaceAggregationOptionsProps {
 	panelType: PANEL_TYPES | null;
@@ -22,39 +20,13 @@ export default function SpaceAggregationOptions({
 	operators,
 	qbVersion,
 }: SpaceAggregationOptionsProps): JSX.Element {
-	const placeHolderText =
-		panelType === PANEL_TYPES.VALUE || qbVersion === 'v3' ? 'Sum' : 'Sum By';
-	const [defaultValue, setDefaultValue] = useState(
-		selectedValue || placeHolderText,
-	);
-
-	useEffect(() => {
-		if (!selectedValue) {
-			if (
-				aggregatorAttributeType === ATTRIBUTE_TYPES.HISTOGRAM ||
-				aggregatorAttributeType === ATTRIBUTE_TYPES.EXPONENTIAL_HISTOGRAM
-			) {
-				setDefaultValue(MetricAggregateOperator.P90);
-				onSelect(MetricAggregateOperator.P90);
-			} else if (aggregatorAttributeType === ATTRIBUTE_TYPES.SUM) {
-				setDefaultValue(MetricAggregateOperator.SUM);
-				onSelect(MetricAggregateOperator.SUM);
-			} else if (aggregatorAttributeType === ATTRIBUTE_TYPES.GAUGE) {
-				setDefaultValue(MetricAggregateOperator.AVG);
-				onSelect(MetricAggregateOperator.AVG);
-			}
-		}
-
-		// eslint-disable-next-line react-hooks/exhaustive-deps
-	}, [aggregatorAttributeType]);
-
 	return (
 		<div
 			className="spaceAggregationOptionsContainer"
 			key={aggregatorAttributeType}
 		>
 			<Select
-				defaultValue={defaultValue}
+				defaultValue={selectedValue}
 				style={{ minWidth: '5.625rem' }}
 				disabled={disabled}
 				onChange={onSelect}

frontend/src/container/QueryBuilder/filters/QueryBuilderSearch/OptionRenderer.styles.scss

@@ -0,0 +1,16 @@
+.selectOptionContainer {
+	display: flex;
+	gap: 8px;
+	justify-content: space-between;
+	align-items: center;
+	overflow-x: auto;
+
+	&::-webkit-scrollbar {
+		width: 0.2rem;
+		height: 0.2rem;
+	}
+}
+
+.option-renderer-tooltip {
+	pointer-events: none;
+}

frontend/src/container/QueryBuilder/filters/QueryBuilderSearch/OptionRenderer.tsx

@@ -1,4 +1,4 @@
-import './QueryBuilderSearch.styles.scss';
+import './OptionRenderer.styles.scss';
 
 import { Tooltip } from 'antd';
 
@@ -13,7 +13,11 @@ function OptionRenderer({
 	return (
 		<span className="option">
 			{type ? (
-				<Tooltip title={`${value}`} placement="topLeft">
+				<Tooltip
+					title={`${value}`}
+					placement="topLeft"
+					rootClassName="option-renderer-tooltip"
+				>
 					<div className="selectOptionContainer">
 						<div className="option-value">{value}</div>
 						<div className="option-meta-data-container">
@@ -29,7 +33,11 @@ function OptionRenderer({
 					</div>
 				</Tooltip>
 			) : (
-				<Tooltip title={label} placement="topLeft">
+				<Tooltip
+					title={label}
+					placement="topLeft"
+					rootClassName="option-renderer-tooltip"
+				>
 					<span>{label}</span>
 				</Tooltip>
 			)}

frontend/src/container/QueryBuilder/filters/QueryBuilderSearch/QueryBuilderSearch.styles.scss

@@ -5,19 +5,6 @@
 	gap: 12px;
 }
 
-.selectOptionContainer {
-	display: flex;
-	gap: 8px;
-	justify-content: space-between;
-	align-items: center;
-	overflow-x: auto;
-
-	&::-webkit-scrollbar {
-		width: 0.2rem;
-		height: 0.2rem;
-	}
-}
-
 .logs-popup {
 	&.hide-scroll {
 		.rc-virtual-list-holder {

frontend/src/container/QueryBuilder/filters/ReduceToFilter/ReduceToFilter.test.tsx

@@ -0,0 +1,88 @@
+import { render, screen } from '@testing-library/react';
+import { MetricType } from 'api/metricsExplorer/getMetricsList';
+import { IBuilderQuery } from 'types/api/queryBuilder/queryBuilderData';
+
+import { ReduceToFilter } from './ReduceToFilter';
+
+const mockOnChange = jest.fn();
+
+function baseQuery(overrides: Partial<IBuilderQuery> = {}): IBuilderQuery {
+	return {
+		dataSource: 'traces',
+		aggregations: [],
+		groupBy: [],
+		orderBy: [],
+		legend: '',
+		limit: null,
+		having: { expression: '' },
+		...overrides,
+	} as IBuilderQuery;
+}
+
+describe('ReduceToFilter', () => {
+	beforeEach(() => {
+		jest.clearAllMocks();
+	});
+
+	it('initializes with default avg when no reduceTo is set', () => {
+		render(<ReduceToFilter query={baseQuery()} onChange={mockOnChange} />);
+
+		expect(screen.getByTestId('reduce-to')).toBeInTheDocument();
+		expect(
+			screen.getByText('Average of values in timeframe'),
+		).toBeInTheDocument();
+	});
+
+	it('initializes from query.aggregations[0].reduceTo', () => {
+		render(
+			<ReduceToFilter
+				query={baseQuery({
+					aggregations: [{ reduceTo: 'sum' } as any],
+					aggregateAttribute: { key: 'test', type: MetricType.SUM },
+				})}
+				onChange={mockOnChange}
+			/>,
+		);
+
+		expect(screen.getByText('Sum of values in timeframe')).toBeInTheDocument();
+	});
+
+	it('initializes from query.reduceTo when aggregations[0].reduceTo is not set', () => {
+		render(
+			<ReduceToFilter
+				query={baseQuery({
+					reduceTo: 'max',
+					aggregateAttribute: { key: 'test', type: MetricType.GAUGE },
+				})}
+				onChange={mockOnChange}
+			/>,
+		);
+
+		expect(screen.getByText('Max of values in timeframe')).toBeInTheDocument();
+	});
+
+	it('updates to sum when aggregateAttribute.type is SUM', async () => {
+		const { rerender } = render(
+			<ReduceToFilter
+				query={baseQuery({
+					aggregateAttribute: { key: 'test', type: MetricType.GAUGE },
+				})}
+				onChange={mockOnChange}
+			/>,
+		);
+
+		rerender(
+			<ReduceToFilter
+				query={baseQuery({
+					aggregateAttribute: { key: 'test2', type: MetricType.SUM },
+				})}
+				onChange={mockOnChange}
+			/>,
+		);
+
+		const reduceToFilterText = (await screen.findByText(
+			'Sum of values in timeframe',
+		)) as HTMLElement;
+		expect(reduceToFilterText).toBeInTheDocument();
+	});
+});

frontend/src/container/QueryBuilder/filters/ReduceToFilter/ReduceToFilter.tsx

@@ -1,6 +1,7 @@
 import { Select } from 'antd';
+import { MetricType } from 'api/metricsExplorer/getMetricsList';
 import { REDUCE_TO_VALUES } from 'constants/queryBuilder';
-import { memo } from 'react';
+import { memo, useEffect, useRef, useState } from 'react';
 import { MetricAggregation } from 'types/api/v5/queryRange';
 // ** Types
 import { ReduceOperators } from 'types/common/queryBuilder';
@@ -12,19 +13,46 @@ export const ReduceToFilter = memo(function ReduceToFilter({
 	query,
 	onChange,
 }: ReduceToFilterProps): JSX.Element {
-	const reduceToValue =
-		(query.aggregations?.[0] as MetricAggregation)?.reduceTo || query.reduceTo;
-
-	const currentValue =
-		REDUCE_TO_VALUES.find((option) => option.value === reduceToValue) ||
-		REDUCE_TO_VALUES[0];
+	const isMounted = useRef<boolean>(false);
+	const [currentValue, setCurrentValue] = useState<
+		SelectOption<ReduceOperators, string>
+	>(REDUCE_TO_VALUES[2]); // default to avg
 
 	const handleChange = (
 		newValue: SelectOption<ReduceOperators, string>,
 	): void => {
+		setCurrentValue(newValue);
 		onChange(newValue.value);
 	};
 
+	useEffect(
+		() => {
+			if (!isMounted.current) {
+				const reduceToValue =
+					(query.aggregations?.[0] as MetricAggregation)?.reduceTo || query.reduceTo;
+
+				setCurrentValue(
+					REDUCE_TO_VALUES.find((option) => option.value === reduceToValue) ||
+						REDUCE_TO_VALUES[2],
+				);
+				isMounted.current = true;
+				return;
+			}
+
+			const aggregationAttributeType = query.aggregateAttribute?.type as
+				| MetricType
+				| undefined;
+
+			if (aggregationAttributeType === MetricType.SUM) {
+				handleChange(REDUCE_TO_VALUES[1]);
+			} else {
+				handleChange(REDUCE_TO_VALUES[2]);
+			}
+		},
+		// eslint-disable-next-line react-hooks/exhaustive-deps
+		[query.aggregateAttribute?.key],
+	);
+
 	return (
 		<Select
 			placeholder="Reduce to"

frontend/src/hooks/metricsExplorer/useGetMultipleMetrics.ts

@@ -0,0 +1,32 @@
+import { getMetricMetadata } from 'api/metricsExplorer/v2/getMetricMetadata';
+import { REACT_QUERY_KEY } from 'constants/reactQueryKeys';
+import { useQueries, UseQueryOptions, UseQueryResult } from 'react-query';
+import { SuccessResponseV2 } from 'types/api';
+import { MetricMetadataResponse } from 'types/api/metricsExplorer/v2/getMetricMetadata';
+
+type QueryResult = UseQueryResult<
+	SuccessResponseV2<MetricMetadataResponse>,
+	Error
+>;
+
+type UseGetMultipleMetrics = (
+	metricNames: string[],
+	options?: UseQueryOptions<SuccessResponseV2<MetricMetadataResponse>, Error>,
+	headers?: Record<string, string>,
+) => QueryResult[];
+
+export const useGetMultipleMetrics: UseGetMultipleMetrics = (
+	metricNames,
+	options,
+	headers,
+) =>
+	useQueries(
+		metricNames.map(
+			(metricName) =>
+				({
+					queryKey: [REACT_QUERY_KEY.GET_METRIC_METADATA, metricName],
+					queryFn: ({ signal }) => getMetricMetadata(metricName, signal, headers),
+					...options,
+				} as UseQueryOptions<SuccessResponseV2<MetricMetadataResponse>, Error>),
+		),
+	);

frontend/src/hooks/metricsExplorer/useUpdateMetricMetadata.ts

@@ -5,7 +5,7 @@ import updateMetricMetadata, {
 import { useMutation, UseMutationResult } from 'react-query';
 import { ErrorResponse, SuccessResponse } from 'types/api';
 
-interface UseUpdateMetricMetadataProps {
+export interface UseUpdateMetricMetadataProps {
 	metricName: string;
 	payload: UpdateMetricMetadataProps;
 }

frontend/src/hooks/queryBuilder/__tests__/useQueryBuilderOperations.test.ts

@@ -188,7 +188,7 @@ describe('useQueryBuilderOperations - Empty Aggregate Attribute Type', () => {
 							timeAggregation: MetricAggregateOperator.RATE,
 							metricName: 'new_sum_metric',
 							temporality: '',
-							spaceAggregation: '',
+							spaceAggregation: MetricAggregateOperator.SUM,
 						},
 					],
 				}),
@@ -239,7 +239,7 @@ describe('useQueryBuilderOperations - Empty Aggregate Attribute Type', () => {
 							timeAggregation: MetricAggregateOperator.RATE,
 							metricName: 'new_sum_metric',
 							temporality: '',
-							spaceAggregation: '',
+							spaceAggregation: MetricAggregateOperator.SUM,
 						},
 					],
 				}),
@@ -315,7 +315,7 @@ describe('useQueryBuilderOperations - Empty Aggregate Attribute Type', () => {
 							timeAggregation: MetricAggregateOperator.AVG,
 							metricName: 'new_gauge',
 							temporality: '',
-							spaceAggregation: '',
+							spaceAggregation: MetricAggregateOperator.AVG,
 						},
 					],
 				}),

frontend/src/hooks/queryBuilder/useQueryBuilderOperations.ts

@@ -317,7 +317,7 @@ export const useQueryOperations: UseQueryOperations = ({
 									timeAggregation: MetricAggregateOperator.RATE,
 									metricName: newQuery.aggregateAttribute?.key || '',
 									temporality: '',
-									spaceAggregation: '',
+									spaceAggregation: MetricAggregateOperator.SUM,
 								},
 							];
 						} else if (newQuery.aggregateAttribute?.type === ATTRIBUTE_TYPES.GAUGE) {
@@ -326,7 +326,20 @@ export const useQueryOperations: UseQueryOperations = ({
 									timeAggregation: MetricAggregateOperator.AVG,
 									metricName: newQuery.aggregateAttribute?.key || '',
 									temporality: '',
-									spaceAggregation: '',
+									spaceAggregation: MetricAggregateOperator.AVG,
+								},
+							];
+						} else if (
+							newQuery.aggregateAttribute?.type === ATTRIBUTE_TYPES.HISTOGRAM ||
+							newQuery.aggregateAttribute?.type ===
+								ATTRIBUTE_TYPES.EXPONENTIAL_HISTOGRAM
+						) {
+							newQuery.aggregations = [
+								{
+									timeAggregation: '',
+									metricName: newQuery.aggregateAttribute?.key || '',
+									temporality: '',
+									spaceAggregation: MetricAggregateOperator.P90,
 								},
 							];
 						} else {

frontend/src/pages/TraceDetailV2/NoData/NoData.tsx

@@ -15,7 +15,7 @@ function NoData(): JSX.Element {
 				<Typography.Text className="not-found-text-1">
 					Uh-oh! We cannot show the selected trace.
 					<span className="not-found-text-2">
-						This can happen in either of the two scenraios -
+						This can happen in either of the two scenarios -
 					</span>
 				</Typography.Text>
 			</section>

frontend/src/types/api/metricsExplorer/v2/getMetricMetadata.ts

@@ -0,0 +1,15 @@
+import { Temporality } from 'api/metricsExplorer/getMetricDetails';
+import { MetricType } from 'api/metricsExplorer/getMetricsList';
+
+export interface MetricMetadata {
+	description: string;
+	type: MetricType;
+	unit: string;
+	temporality: Temporality;
+	isMonotonic: boolean;
+}
+
+export interface MetricMetadataResponse {
+	status: string;
+	data: MetricMetadata;
+}

pkg/apiserver/signozapiserver/promote.go

@@ -10,8 +10,8 @@ import (
 
 func (provider *provider) addPromoteRoutes(router *mux.Router) error {
 	if err := router.Handle("/api/v1/logs/promote_paths", handler.New(provider.authZ.EditAccess(provider.promoteHandler.HandlePromoteAndIndexPaths), handler.OpenAPIDef{
-		ID:                  "PromotePaths",
-		Tags:                []string{"promoted_paths", "logs", "json_logs"},
+		ID:                  "HandlePromoteAndIndexPaths",
+		Tags:                []string{"logs"},
 		Summary:             "Promote and index paths",
 		Description:         "This endpoints promotes and indexes paths",
 		Request:             new([]*promotetypes.PromotePath),
@@ -25,8 +25,8 @@ func (provider *provider) addPromoteRoutes(router *mux.Router) error {
 	}
 
 	if err := router.Handle("/api/v1/logs/promote_paths", handler.New(provider.authZ.ViewAccess(provider.promoteHandler.ListPromotedAndIndexedPaths), handler.OpenAPIDef{
-		ID:                  "PromotePaths",
-		Tags:                []string{"promoted_paths", "logs", "json_logs"},
+		ID:                  "ListPromotedAndIndexedPaths",
+		Tags:                []string{"logs"},
 		Summary:             "Promote and index paths",
 		Description:         "This endpoints promotes and indexes paths",
 		Request:             nil,

pkg/telemetrylogs/json_access_pb.go

@@ -0,0 +1,149 @@
+package telemetrylogs
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	"github.com/SigNoz/signoz/pkg/errors"
+	qbtypes "github.com/SigNoz/signoz/pkg/types/querybuildertypes/querybuildertypesv5"
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
+)
+
+var (
+	CodePlanIndexOutOfBounds = errors.MustNewCode("plan_index_out_of_bounds")
+)
+
+type JSONAccessPlanBuilder struct {
+	key        *telemetrytypes.TelemetryFieldKey
+	value      any
+	op         qbtypes.FilterOperator
+	parts      []string
+	getTypes   func(ctx context.Context, path string) ([]telemetrytypes.JSONDataType, error)
+	isPromoted bool
+}
+
+// buildPlan recursively builds the path plan tree
+func (pb *JSONAccessPlanBuilder) buildPlan(ctx context.Context, index int, parent *telemetrytypes.JSONAccessNode, isDynArrChild bool) (*telemetrytypes.JSONAccessNode, error) {
+	if index >= len(pb.parts) {
+		return nil, errors.NewInvalidInputf(CodePlanIndexOutOfBounds, "index is out of bounds")
+	}
+
+	part := pb.parts[index]
+	pathSoFar := strings.Join(pb.parts[:index+1], ArraySep)
+	isTerminal := index == len(pb.parts)-1
+
+	// Calculate progression parameters based on parent's values
+	var maxTypes, maxPaths int
+	if isDynArrChild {
+		// Child of Dynamic array - reset progression to base values (16, 256)
+		// This happens when we switch from Array(Dynamic) to Array(JSON)
+		maxTypes = 16
+		maxPaths = 256
+	} else if parent != nil {
+		// Child of JSON array - use parent's progression divided by 2 and 4
+		maxTypes = parent.MaxDynamicTypes / 2
+		maxPaths = parent.MaxDynamicPaths / 4
+		if maxTypes < 0 {
+			maxTypes = 0
+		}
+		if maxPaths < 0 {
+			maxPaths = 0
+		}
+	}
+
+	types, err := pb.getTypes(ctx, pathSoFar)
+	if err != nil {
+		return nil, err
+	}
+
+	// Create node for this path segment
+	node := &telemetrytypes.JSONAccessNode{
+		Name:            part,
+		IsTerminal:      isTerminal,
+		AvailableTypes:  types,
+		Branches:        make(map[telemetrytypes.JSONAccessBranchType]*telemetrytypes.JSONAccessNode),
+		Parent:          parent,
+		MaxDynamicTypes: maxTypes,
+		MaxDynamicPaths: maxPaths,
+	}
+
+	hasJSON := slices.Contains(node.AvailableTypes, telemetrytypes.ArrayJSON)
+	hasDynamic := slices.Contains(node.AvailableTypes, telemetrytypes.ArrayDynamic)
+
+	// Configure terminal if this is the last part
+	if isTerminal {
+		valueType, _ := inferDataType(pb.value, pb.op, pb.key)
+		node.TerminalConfig = &telemetrytypes.TerminalConfig{
+			Key:       pb.key,
+			ElemType:  *pb.key.JSONDataType,
+			ValueType: telemetrytypes.MappingFieldDataTypeToJSONDataType[valueType],
+		}
+	} else {
+		if hasJSON {
+			node.Branches[telemetrytypes.BranchJSON], err = pb.buildPlan(ctx, index+1, node, false)
+			if err != nil {
+				return nil, err
+			}
+		}
+		if hasDynamic {
+			node.Branches[telemetrytypes.BranchDynamic], err = pb.buildPlan(ctx, index+1, node, true)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	return node, nil
+}
+
+// PlanJSON builds a tree structure representing the complete JSON path traversal
+// that precomputes all possible branches and their types
+func PlanJSON(ctx context.Context, key *telemetrytypes.TelemetryFieldKey, op qbtypes.FilterOperator,
+	value any,
+	getTypes func(ctx context.Context, path string) ([]telemetrytypes.JSONDataType, error),
+) (telemetrytypes.JSONAccessPlan, error) {
+	// if path is empty, return nil
+	if key.Name == "" {
+		return nil, errors.NewInvalidInputf(errors.CodeInvalidInput, "path is empty")
+	}
+
+	// TODO: PlanJSON requires the Start and End of the Query to select correct column between promoted and body_json using
+	// creation time in distributed_promoted_paths
+	path := strings.ReplaceAll(key.Name, ArrayAnyIndex, ArraySep)
+	parts := strings.Split(path, ArraySep)
+
+	pb := &JSONAccessPlanBuilder{
+		key:        key,
+		op:         op,
+		value:      value,
+		parts:      parts,
+		getTypes:   getTypes,
+		isPromoted: key.Materialized,
+	}
+	plans := telemetrytypes.JSONAccessPlan{}
+
+	node, err := pb.buildPlan(ctx, 0,
+		telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn,
+			32, 0),
+		false,
+	)
+	if err != nil {
+		return nil, err
+	}
+	plans = append(plans, node)
+
+	if pb.isPromoted {
+		node, err := pb.buildPlan(ctx, 0,
+			telemetrytypes.NewRootJSONAccessNode(LogsV2BodyPromotedColumn,
+				32, 1024),
+			true,
+		)
+		if err != nil {
+			return nil, err
+		}
+		plans = append(plans, node)
+	}
+
+	return plans, nil
+}

pkg/telemetrylogs/json_access_pb_test.go

@@ -0,0 +1,880 @@
+package telemetrylogs
+
+import (
+	"context"
+	"testing"
+
+	qbtypes "github.com/SigNoz/signoz/pkg/types/querybuildertypes/querybuildertypesv5"
+	"github.com/SigNoz/signoz/pkg/types/telemetrytypes"
+	"github.com/stretchr/testify/require"
+	"gopkg.in/yaml.v3"
+)
+
+// ============================================================================
+// Helper Functions for Test Data Creation
+// ============================================================================
+
+// makeKey creates a TelemetryFieldKey for testing
+func makeKey(name string, dataType telemetrytypes.JSONDataType, materialized bool) *telemetrytypes.TelemetryFieldKey {
+	return &telemetrytypes.TelemetryFieldKey{
+		Name:         name,
+		JSONDataType: &dataType,
+		Materialized: materialized,
+	}
+}
+
+// makeGetTypes creates a getTypes function from a map of path -> types
+func makeGetTypes(typesMap map[string][]telemetrytypes.JSONDataType) func(ctx context.Context, path string) ([]telemetrytypes.JSONDataType, error) {
+	return func(_ context.Context, path string) ([]telemetrytypes.JSONDataType, error) {
+		return typesMap[path], nil
+	}
+}
+
+// ============================================================================
+// Helper Functions for Node Validation
+// ============================================================================
+
+// jsonAccessTestNode is a test-only, YAML-friendly view of JSONAccessNode.
+// It intentionally omits Parent to avoid cycles and only keeps the fields
+// that are useful for understanding / asserting the plan structure.
+type jsonAccessTestNode struct {
+	Name            string                         `yaml:"name"`
+	Column          string                         `yaml:"column,omitempty"`
+	IsTerminal      bool                           `yaml:"isTerminal,omitempty"`
+	MaxDynamicTypes int                            `yaml:"maxDynamicTypes,omitempty"`
+	MaxDynamicPaths int                            `yaml:"maxDynamicPaths,omitempty"`
+	ElemType        string                         `yaml:"elemType,omitempty"`
+	ValueType       string                         `yaml:"valueType,omitempty"`
+	AvailableTypes  []string                       `yaml:"availableTypes,omitempty"`
+	Branches        map[string]*jsonAccessTestNode `yaml:"branches,omitempty"`
+}
+
+// toTestNode converts a JSONAccessNode tree into jsonAccessTestNode so that
+// it can be serialized to YAML for easy visual comparison in tests.
+func toTestNode(n *telemetrytypes.JSONAccessNode) *jsonAccessTestNode {
+	if n == nil {
+		return nil
+	}
+
+	out := &jsonAccessTestNode{
+		Name:            n.Name,
+		IsTerminal:      n.IsTerminal,
+		MaxDynamicTypes: n.MaxDynamicTypes,
+		MaxDynamicPaths: n.MaxDynamicPaths,
+	}
+
+	// Column information for top-level plan nodes: their parent is the root,
+	// whose parent is nil.
+	if n.Parent != nil && n.Parent.Parent == nil {
+		out.Column = n.Parent.Name
+	}
+
+	// AvailableTypes as strings (using StringValue for stable representation)
+	if len(n.AvailableTypes) > 0 {
+		out.AvailableTypes = make([]string, 0, len(n.AvailableTypes))
+		for _, t := range n.AvailableTypes {
+			out.AvailableTypes = append(out.AvailableTypes, t.StringValue())
+		}
+	}
+
+	// Terminal config
+	if n.TerminalConfig != nil {
+		out.ElemType = n.TerminalConfig.ElemType.StringValue()
+		out.ValueType = n.TerminalConfig.ValueType.StringValue()
+	}
+
+	// Branches
+	if len(n.Branches) > 0 {
+		out.Branches = make(map[string]*jsonAccessTestNode, len(n.Branches))
+		for bt, child := range n.Branches {
+			out.Branches[bt.StringValue()] = toTestNode(child)
+		}
+	}
+
+	return out
+}
+
+// plansToYAML converts a slice of JSONAccessNode plans to a YAML string that
+// can be compared against a per-test expectedTree.
+func plansToYAML(t *testing.T, plans []*telemetrytypes.JSONAccessNode) string {
+	t.Helper()
+
+	testNodes := make([]*jsonAccessTestNode, 0, len(plans))
+	for _, p := range plans {
+		testNodes = append(testNodes, toTestNode(p))
+	}
+
+	got, err := yaml.Marshal(testNodes)
+	require.NoError(t, err)
+	return string(got)
+}
+
+// ============================================================================
+// Test Cases for Node Methods
+// ============================================================================
+
+func TestNode_Alias(t *testing.T) {
+	tests := []struct {
+		name     string
+		node     *telemetrytypes.JSONAccessNode
+		expected string
+	}{
+		{
+			name:     "Root node returns name as-is",
+			node:     telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+			expected: LogsV2BodyJSONColumn,
+		},
+		{
+			name: "Node without parent returns backticked name",
+			node: &telemetrytypes.JSONAccessNode{
+				Name:   "user",
+				Parent: nil,
+			},
+			expected: "`user`",
+		},
+		{
+			name: "Node with root parent uses dot separator",
+			node: &telemetrytypes.JSONAccessNode{
+				Name:   "age",
+				Parent: telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+			},
+			expected: "`" + LogsV2BodyJSONColumn + ".age`",
+		},
+		{
+			name: "Node with non-root parent uses array separator",
+			node: &telemetrytypes.JSONAccessNode{
+				Name: "name",
+				Parent: &telemetrytypes.JSONAccessNode{
+					Name:   "education",
+					Parent: telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+				},
+			},
+			expected: "`" + LogsV2BodyJSONColumn + ".education[].name`",
+		},
+		{
+			name: "Nested array path with multiple levels",
+			node: &telemetrytypes.JSONAccessNode{
+				Name: "type",
+				Parent: &telemetrytypes.JSONAccessNode{
+					Name: "awards",
+					Parent: &telemetrytypes.JSONAccessNode{
+						Name:   "education",
+						Parent: telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+					},
+				},
+			},
+			expected: "`" + LogsV2BodyJSONColumn + ".education[].awards[].type`",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := tt.node.Alias()
+			require.Equal(t, tt.expected, result)
+		})
+	}
+}
+
+func TestNode_FieldPath(t *testing.T) {
+	tests := []struct {
+		name     string
+		node     *telemetrytypes.JSONAccessNode
+		expected string
+	}{
+		{
+			name: "Simple field path from root",
+			node: &telemetrytypes.JSONAccessNode{
+				Name:   "user",
+				Parent: telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+			},
+			// FieldPath() always wraps the field name in backticks
+			expected: LogsV2BodyJSONColumn + ".`user`",
+		},
+		{
+			name: "Field path with backtick-required key",
+			node: &telemetrytypes.JSONAccessNode{
+				Name:   "user-name", // requires backtick
+				Parent: telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+			},
+			expected: LogsV2BodyJSONColumn + ".`user-name`",
+		},
+		{
+			name: "Nested field path",
+			node: &telemetrytypes.JSONAccessNode{
+				Name: "age",
+				Parent: &telemetrytypes.JSONAccessNode{
+					Name:   "user",
+					Parent: telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+				},
+			},
+			// FieldPath() always wraps the field name in backticks
+			expected: "`" + LogsV2BodyJSONColumn + ".user`.`age`",
+		},
+		{
+			name: "Array element field path",
+			node: &telemetrytypes.JSONAccessNode{
+				Name: "name",
+				Parent: &telemetrytypes.JSONAccessNode{
+					Name:   "education",
+					Parent: telemetrytypes.NewRootJSONAccessNode(LogsV2BodyJSONColumn, 32, 0),
+				},
+			},
+			// FieldPath() always wraps the field name in backticks
+			expected: "`" + LogsV2BodyJSONColumn + ".education`.`name`",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := tt.node.FieldPath()
+			require.Equal(t, tt.expected, result)
+		})
+	}
+}
+
+// ============================================================================
+// Test Cases for PlanJSON
+// ============================================================================
+
+func TestPlanJSON_BasicStructure(t *testing.T) {
+	_, getTypes := testTypeSet()
+
+	tests := []struct {
+		name         string
+		key          *telemetrytypes.TelemetryFieldKey
+		expectErr    bool
+		expectedYAML string
+	}{
+		{
+			name: "Simple path not promoted",
+			key:  makeKey("user.name", telemetrytypes.String, false),
+			expectedYAML: `
+- name: user.name
+  column: body_json
+  availableTypes:
+    - String
+  maxDynamicTypes: 16
+  isTerminal: true
+  elemType: String
+  valueType: String
+`,
+		},
+		{
+			name: "Simple path promoted",
+			key:  makeKey("user.name", telemetrytypes.String, true),
+			expectedYAML: `
+- name: user.name
+  column: body_json
+  availableTypes:
+    - String
+  maxDynamicTypes: 16
+  isTerminal: true
+  elemType: String
+  valueType: String
+- name: user.name
+  column: body_json_promoted
+  availableTypes:
+    - String
+  maxDynamicTypes: 16
+  maxDynamicPaths: 256
+  isTerminal: true
+  elemType: String
+  valueType: String
+`,
+		},
+		{
+			name:         "Empty path returns error",
+			key:          makeKey("", telemetrytypes.String, false),
+			expectErr:    true,
+			expectedYAML: "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			plans, err := PlanJSON(context.Background(), tt.key, qbtypes.FilterOperatorEqual, "John", getTypes)
+			if tt.expectErr {
+				require.Error(t, err)
+				require.Nil(t, plans)
+				return
+			}
+			require.NoError(t, err)
+			got := plansToYAML(t, plans)
+			require.YAMLEq(t, tt.expectedYAML, got)
+		})
+	}
+}
+
+func TestPlanJSON_ArrayPaths(t *testing.T) {
+	_, getTypes := testTypeSet()
+
+	tests := []struct {
+		name         string
+		path         string
+		expectedYAML string
+	}{
+		{
+			name: "Single array level - JSON branch only",
+			path: "education[].name",
+			expectedYAML: `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: name
+      availableTypes:
+        - String
+      maxDynamicTypes: 8
+      isTerminal: true
+      elemType: String
+      valueType: String
+`,
+		},
+		{
+			name: "Single array level - both JSON and Dynamic branches",
+			path: "education[].awards[].type",
+			expectedYAML: `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: awards
+      availableTypes:
+        - Array(Dynamic)
+        - Array(JSON)
+      maxDynamicTypes: 8
+      branches:
+        json:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 4
+          isTerminal: true
+          elemType: String
+          valueType: String
+        dynamic:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 16
+          maxDynamicPaths: 256
+          isTerminal: true
+          elemType: String
+          valueType: String
+`,
+		},
+		{
+			name: "Deeply nested array path",
+			path: "interests[].entities[].reviews[].entries[].metadata[].positions[].name",
+			expectedYAML: `
+- name: interests
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: entities
+      availableTypes:
+        - Array(JSON)
+      maxDynamicTypes: 8
+      branches:
+        json:
+          name: reviews
+          availableTypes:
+            - Array(JSON)
+          maxDynamicTypes: 4
+          branches:
+            json:
+              name: entries
+              availableTypes:
+                - Array(JSON)
+              maxDynamicTypes: 2
+              branches:
+                json:
+                  name: metadata
+                  availableTypes:
+                    - Array(JSON)
+                  maxDynamicTypes: 1
+                  branches:
+                    json:
+                      name: positions
+                      availableTypes:
+                        - Array(JSON)
+                      branches:
+                        json:
+                          name: name
+                          availableTypes:
+                            - String
+                          isTerminal: true
+                          elemType: String
+                          valueType: String
+`,
+		},
+		{
+			name: "ArrayAnyIndex replacement [*] to []",
+			path: "education[*].name",
+			expectedYAML: `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: name
+      availableTypes:
+        - String
+      maxDynamicTypes: 8
+      isTerminal: true
+      elemType: String
+      valueType: String
+`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			key := makeKey(tt.path, telemetrytypes.String, false)
+			plans, err := PlanJSON(context.Background(), key, qbtypes.FilterOperatorEqual, "John", getTypes)
+			require.NoError(t, err)
+			require.NotNil(t, plans)
+			require.Len(t, plans, 1)
+			got := plansToYAML(t, plans)
+			require.YAMLEq(t, tt.expectedYAML, got)
+		})
+	}
+}
+
+func TestPlanJSON_PromotedVsNonPromoted(t *testing.T) {
+	_, getTypes := testTypeSet()
+	path := "education[].awards[].type"
+	value := "sports"
+
+	t.Run("Non-promoted plan", func(t *testing.T) {
+		key := makeKey(path, telemetrytypes.String, false)
+		plans, err := PlanJSON(context.Background(), key, qbtypes.FilterOperatorEqual, value, getTypes)
+		require.NoError(t, err)
+		require.Len(t, plans, 1)
+
+		expectedYAML := `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: awards
+      availableTypes:
+        - Array(Dynamic)
+        - Array(JSON)
+      maxDynamicTypes: 8
+      branches:
+        json:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 4
+          isTerminal: true
+          elemType: String
+          valueType: String
+        dynamic:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 16
+          maxDynamicPaths: 256
+          isTerminal: true
+          elemType: String
+          valueType: String
+`
+		got := plansToYAML(t, plans)
+		require.YAMLEq(t, expectedYAML, got)
+	})
+
+	t.Run("Promoted plan", func(t *testing.T) {
+		key := makeKey(path, telemetrytypes.String, true)
+		plans, err := PlanJSON(context.Background(), key, qbtypes.FilterOperatorEqual, value, getTypes)
+		require.NoError(t, err)
+		require.Len(t, plans, 2)
+
+		expectedYAML := `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: awards
+      availableTypes:
+        - Array(Dynamic)
+        - Array(JSON)
+      maxDynamicTypes: 8
+      branches:
+        json:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 4
+          isTerminal: true
+          elemType: String
+          valueType: String
+        dynamic:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 16
+          maxDynamicPaths: 256
+          isTerminal: true
+          elemType: String
+          valueType: String
+- name: education
+  column: body_json_promoted
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  maxDynamicPaths: 256
+  branches:
+    json:
+      name: awards
+      availableTypes:
+        - Array(Dynamic)
+        - Array(JSON)
+      maxDynamicTypes: 8
+      maxDynamicPaths: 64
+      branches:
+        json:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 4
+          maxDynamicPaths: 16
+          isTerminal: true
+          elemType: String
+          valueType: String
+        dynamic:
+          name: type
+          availableTypes:
+            - String
+          maxDynamicTypes: 16
+          maxDynamicPaths: 256
+          isTerminal: true
+          elemType: String
+          valueType: String
+`
+		got := plansToYAML(t, plans)
+		require.YAMLEq(t, expectedYAML, got)
+	})
+}
+
+func TestPlanJSON_EdgeCases(t *testing.T) {
+	_, getTypes := testTypeSet()
+
+	tests := []struct {
+		name         string
+		path         string
+		value        any
+		expectedYAML string
+	}{
+		{
+			name:  "Path with no available types",
+			path:  "unknown.path",
+			value: "test",
+			expectedYAML: `
+- name: unknown.path
+  column: body_json
+  maxDynamicTypes: 16
+  isTerminal: true
+  elemType: String
+  valueType: String
+`,
+		},
+		{
+			name:  "Very deep nesting - validates progression doesn't go negative",
+			path:  "interests[].entities[].reviews[].entries[].metadata[].positions[].name",
+			value: "Engineer",
+			expectedYAML: `
+- name: interests
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: entities
+      availableTypes:
+        - Array(JSON)
+      maxDynamicTypes: 8
+      branches:
+        json:
+          name: reviews
+          availableTypes:
+            - Array(JSON)
+          maxDynamicTypes: 4
+          branches:
+            json:
+              name: entries
+              availableTypes:
+                - Array(JSON)
+              maxDynamicTypes: 2
+              branches:
+                json:
+                  name: metadata
+                  availableTypes:
+                    - Array(JSON)
+                  maxDynamicTypes: 1
+                  branches:
+                    json:
+                      name: positions
+                      availableTypes:
+                        - Array(JSON)
+                      branches:
+                        json:
+                          name: name
+                          availableTypes:
+                            - String
+                          isTerminal: true
+                          elemType: String
+                          valueType: String
+`,
+		},
+		{
+			name:  "Path with mixed scalar and array types",
+			path:  "education[].type",
+			value: "high_school",
+			expectedYAML: `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: type
+      availableTypes:
+        - String
+        - Int64
+      maxDynamicTypes: 8
+      isTerminal: true
+      elemType: String
+      valueType: String
+`,
+		},
+		{
+			name:  "Exists with only array types available",
+			path:  "education",
+			value: nil,
+			expectedYAML: `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  isTerminal: true
+  elemType: Array(JSON)
+`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Choose key type based on path; operator does not affect the tree shape asserted here.
+			keyType := telemetrytypes.String
+			switch tt.path {
+			case "education":
+				keyType = telemetrytypes.ArrayJSON
+			case "education[].type":
+				keyType = telemetrytypes.String
+			}
+			key := makeKey(tt.path, keyType, false)
+			plans, err := PlanJSON(context.Background(), key, qbtypes.FilterOperatorEqual, tt.value, getTypes)
+			require.NoError(t, err)
+			got := plansToYAML(t, plans)
+			require.YAMLEq(t, tt.expectedYAML, got)
+		})
+	}
+}
+
+func TestPlanJSON_TreeStructure(t *testing.T) {
+	_, getTypes := testTypeSet()
+	path := "education[].awards[].participated[].team[].branch"
+	key := makeKey(path, telemetrytypes.String, false)
+	plans, err := PlanJSON(context.Background(), key, qbtypes.FilterOperatorEqual, "John", getTypes)
+	require.NoError(t, err)
+	require.Len(t, plans, 1)
+
+	expectedYAML := `
+- name: education
+  column: body_json
+  availableTypes:
+    - Array(JSON)
+  maxDynamicTypes: 16
+  branches:
+    json:
+      name: awards
+      availableTypes:
+        - Array(Dynamic)
+        - Array(JSON)
+      maxDynamicTypes: 8
+      branches:
+        json:
+          name: participated
+          availableTypes:
+            - Array(Dynamic)
+            - Array(JSON)
+          maxDynamicTypes: 4
+          branches:
+            json:
+              name: team
+              availableTypes:
+                - Array(JSON)
+              maxDynamicTypes: 2
+              branches:
+                json:
+                  name: branch
+                  availableTypes:
+                    - String
+                  maxDynamicTypes: 1
+                  isTerminal: true
+                  elemType: String
+                  valueType: String
+            dynamic:
+              name: team
+              availableTypes:
+                - Array(JSON)
+              maxDynamicTypes: 16
+              maxDynamicPaths: 256
+              branches:
+                json:
+                  name: branch
+                  availableTypes:
+                    - String
+                  maxDynamicTypes: 8
+                  maxDynamicPaths: 64
+                  isTerminal: true
+                  elemType: String
+                  valueType: String
+        dynamic:
+          name: participated
+          availableTypes:
+            - Array(Dynamic)
+            - Array(JSON)
+          maxDynamicTypes: 16
+          maxDynamicPaths: 256
+          branches:
+            json:
+              name: team
+              availableTypes:
+                - Array(JSON)
+              maxDynamicTypes: 8
+              maxDynamicPaths: 64
+              branches:
+                json:
+                  name: branch
+                  availableTypes:
+                    - String
+                  maxDynamicTypes: 4
+                  maxDynamicPaths: 16
+                  isTerminal: true
+                  elemType: String
+                  valueType: String
+            dynamic:
+              name: team
+              availableTypes:
+                - Array(JSON)
+              maxDynamicTypes: 16
+              maxDynamicPaths: 256
+              branches:
+                json:
+                  name: branch
+                  availableTypes:
+                    - String
+                  maxDynamicTypes: 8
+                  maxDynamicPaths: 64
+                  isTerminal: true
+                  elemType: String
+                  valueType: String
+`
+
+	got := plansToYAML(t, plans)
+	require.YAMLEq(t, expectedYAML, got)
+}
+
+// ============================================================================
+// Test Data Setup
+// ============================================================================
+
+// testTypeSet returns a map of path->types and a getTypes function for testing
+// This represents the type information available in the test JSON structure
+//
+// TODO(Piyush): Remove this unparam nolint
+// nolint:unparam
+func testTypeSet() (map[string][]telemetrytypes.JSONDataType, func(ctx context.Context, path string) ([]telemetrytypes.JSONDataType, error)) {
+	types := map[string][]telemetrytypes.JSONDataType{
+		"user.name":                                           {telemetrytypes.String},
+		"user.age":                                            {telemetrytypes.Int64, telemetrytypes.String},
+		"user.height":                                         {telemetrytypes.Float64},
+		"education":                                           {telemetrytypes.ArrayJSON},
+		"education[].name":                                    {telemetrytypes.String},
+		"education[].type":                                    {telemetrytypes.String, telemetrytypes.Int64},
+		"education[].internal_type":                           {telemetrytypes.String},
+		"education[].metadata.location":                       {telemetrytypes.String},
+		"education[].parameters":                              {telemetrytypes.ArrayFloat64, telemetrytypes.ArrayDynamic},
+		"education[].duration":                                {telemetrytypes.String},
+		"education[].mode":                                    {telemetrytypes.String},
+		"education[].year":                                    {telemetrytypes.Int64},
+		"education[].field":                                   {telemetrytypes.String},
+		"education[].awards":                                  {telemetrytypes.ArrayDynamic, telemetrytypes.ArrayJSON},
+		"education[].awards[].name":                           {telemetrytypes.String},
+		"education[].awards[].rank":                           {telemetrytypes.Int64},
+		"education[].awards[].medal":                          {telemetrytypes.String},
+		"education[].awards[].type":                           {telemetrytypes.String},
+		"education[].awards[].semester":                       {telemetrytypes.Int64},
+		"education[].awards[].participated":                   {telemetrytypes.ArrayDynamic, telemetrytypes.ArrayJSON},
+		"education[].awards[].participated[].type":            {telemetrytypes.String},
+		"education[].awards[].participated[].field":           {telemetrytypes.String},
+		"education[].awards[].participated[].project_type":    {telemetrytypes.String},
+		"education[].awards[].participated[].project_name":    {telemetrytypes.String},
+		"education[].awards[].participated[].race_type":       {telemetrytypes.String},
+		"education[].awards[].participated[].team_based":      {telemetrytypes.Bool},
+		"education[].awards[].participated[].team_name":       {telemetrytypes.String},
+		"education[].awards[].participated[].team":            {telemetrytypes.ArrayJSON},
+		"education[].awards[].participated[].team[].name":     {telemetrytypes.String},
+		"education[].awards[].participated[].team[].branch":   {telemetrytypes.String},
+		"education[].awards[].participated[].team[].semester": {telemetrytypes.Int64},
+		"interests":                                                                  {telemetrytypes.ArrayJSON},
+		"interests[].type":                                                           {telemetrytypes.String},
+		"interests[].entities":                                                       {telemetrytypes.ArrayJSON},
+		"interests[].entities.application_date":                                      {telemetrytypes.String},
+		"interests[].entities[].reviews":                                             {telemetrytypes.ArrayJSON},
+		"interests[].entities[].reviews[].given_by":                                  {telemetrytypes.String},
+		"interests[].entities[].reviews[].remarks":                                   {telemetrytypes.String},
+		"interests[].entities[].reviews[].weight":                                    {telemetrytypes.Float64},
+		"interests[].entities[].reviews[].passed":                                    {telemetrytypes.Bool},
+		"interests[].entities[].reviews[].type":                                      {telemetrytypes.String},
+		"interests[].entities[].reviews[].analysis_type":                             {telemetrytypes.Int64},
+		"interests[].entities[].reviews[].entries":                                   {telemetrytypes.ArrayJSON},
+		"interests[].entities[].reviews[].entries[].subject":                         {telemetrytypes.String},
+		"interests[].entities[].reviews[].entries[].status":                          {telemetrytypes.String},
+		"interests[].entities[].reviews[].entries[].metadata":                        {telemetrytypes.ArrayJSON},
+		"interests[].entities[].reviews[].entries[].metadata[].company":              {telemetrytypes.String},
+		"interests[].entities[].reviews[].entries[].metadata[].experience":           {telemetrytypes.Int64},
+		"interests[].entities[].reviews[].entries[].metadata[].unit":                 {telemetrytypes.String},
+		"interests[].entities[].reviews[].entries[].metadata[].positions":            {telemetrytypes.ArrayJSON},
+		"interests[].entities[].reviews[].entries[].metadata[].positions[].name":     {telemetrytypes.String},
+		"interests[].entities[].reviews[].entries[].metadata[].positions[].duration": {telemetrytypes.Int64, telemetrytypes.Float64},
+		"interests[].entities[].reviews[].entries[].metadata[].positions[].unit":     {telemetrytypes.String},
+		"interests[].entities[].reviews[].entries[].metadata[].positions[].ratings":  {telemetrytypes.ArrayInt64, telemetrytypes.ArrayString},
+		"message": {telemetrytypes.String},
+	}
+
+	return types, makeGetTypes(types)
+}

pkg/telemetrymetadata/body_json_metadata.go

@@ -245,7 +245,7 @@ func (t *telemetryMetaStore) ListLogsJSONIndexes(ctx context.Context, filters ..
 	}
 	defer rows.Close()
 
-	indexesMap := make(map[string][]schemamigrator.Index)
+	indexes := make(map[string][]schemamigrator.Index)
 	for rows.Next() {
 		var name string
 		var typeFull string
@@ -254,7 +254,7 @@ func (t *telemetryMetaStore) ListLogsJSONIndexes(ctx context.Context, filters ..
 		if err := rows.Scan(&name, &typeFull, &expr, &granularity); err != nil {
 			return nil, errors.WrapInternalf(err, CodeFailLoadLogsJSONIndexes, "failed to scan string indexed column")
 		}
-		indexesMap[name] = append(indexesMap[name], schemamigrator.Index{
+		indexes[name] = append(indexes[name], schemamigrator.Index{
 			Name:        name,
 			Type:        typeFull,
 			Expression:  expr,
@@ -262,7 +262,7 @@ func (t *telemetryMetaStore) ListLogsJSONIndexes(ctx context.Context, filters ..
 		})
 	}
 
-	return indexesMap, nil
+	return indexes, nil
 }
 
 func (t *telemetryMetaStore) ListPromotedPaths(ctx context.Context, paths ...string) (map[string]struct{}, error) {

pkg/types/telemetrytypes/json_access_plan.go

@@ -0,0 +1,82 @@
+package telemetrytypes
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/SigNoz/signoz-otel-collector/exporter/jsontypeexporter"
+	"github.com/SigNoz/signoz/pkg/valuer"
+)
+
+type JSONAccessBranchType struct {
+	valuer.String
+}
+
+var (
+	BranchJSON    = JSONAccessBranchType{valuer.NewString("json")}
+	BranchDynamic = JSONAccessBranchType{valuer.NewString("dynamic")}
+)
+
+type JSONAccessPlan = []*JSONAccessNode
+
+type TerminalConfig struct {
+	Key       *TelemetryFieldKey
+	ElemType  JSONDataType
+	ValueType JSONDataType
+}
+
+// Node is now a tree structure representing the complete JSON path traversal
+// that precomputes all possible branches and their types
+type JSONAccessNode struct {
+	// Node information
+	Name       string
+	IsTerminal bool
+	isRoot     bool // marked true for only body_json and body_json_promoted
+
+	// Precomputed type information (single source of truth)
+	AvailableTypes []JSONDataType
+
+	// Array type branches (Array(JSON) vs Array(Dynamic))
+	Branches map[JSONAccessBranchType]*JSONAccessNode
+
+	// Terminal configuration
+	TerminalConfig *TerminalConfig
+
+	// Parent reference for traversal
+	Parent *JSONAccessNode
+
+	// JSON progression parameters (precomputed during planning)
+	MaxDynamicTypes int
+	MaxDynamicPaths int
+}
+
+func NewRootJSONAccessNode(name string, maxDynamicTypes, maxDynamicPaths int) *JSONAccessNode {
+	return &JSONAccessNode{
+		Name:            name,
+		isRoot:          true,
+		MaxDynamicTypes: maxDynamicTypes,
+		MaxDynamicPaths: maxDynamicPaths,
+	}
+}
+
+func (n *JSONAccessNode) Alias() string {
+	if n.isRoot {
+		return n.Name
+	} else if n.Parent == nil {
+		return fmt.Sprintf("`%s`", n.Name)
+	}
+
+	parentAlias := strings.TrimLeft(n.Parent.Alias(), "`")
+	parentAlias = strings.TrimRight(parentAlias, "`")
+
+	sep := jsontypeexporter.ArraySeparator
+	if n.Parent.isRoot {
+		sep = "."
+	}
+	return fmt.Sprintf("`%s%s%s`", parentAlias, sep, n.Name)
+}
+
+func (n *JSONAccessNode) FieldPath() string {
+	key := "`" + n.Name + "`"
+	return n.Parent.Alias() + "." + key
+}