chore: minor fix

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>

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/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/YAxisUnitSelector/YAxisUnitSelector.tsx

@@ -1,11 +1,18 @@
 import './styles.scss';
 
-import { Select } from 'antd';
+import { WarningFilled } from '@ant-design/icons';
+import { Select, Tooltip } from 'antd';
 import { DefaultOptionType } from 'antd/es/select';
+import classNames from 'classnames';
+import { useMemo } from 'react';
 
 import { UniversalYAxisUnitMappings } from './constants';
 import { UniversalYAxisUnit, YAxisUnitSelectorProps } from './types';
-import { getYAxisCategories, mapMetricUnitToUniversalUnit } from './utils';
+import {
+	getUniversalNameFromMetricUnit,
+	getYAxisCategories,
+	mapMetricUnitToUniversalUnit,
+} from './utils';
 
 function YAxisUnitSelector({
 	value,
@@ -14,9 +21,24 @@ function YAxisUnitSelector({
 	loading = false,
 	'data-testid': dataTestId,
 	source,
+	initialValue,
 }: YAxisUnitSelectorProps): JSX.Element {
 	const universalUnit = mapMetricUnitToUniversalUnit(value);
 
+	const incompatibleUnitMessage = useMemo(() => {
+		if (!initialValue || !value || loading) return '';
+		const initialUniversalUnit = mapMetricUnitToUniversalUnit(initialValue);
+		const currentUniversalUnit = mapMetricUnitToUniversalUnit(value);
+		if (initialUniversalUnit !== currentUniversalUnit) {
+			const initialUniversalUnitName = getUniversalNameFromMetricUnit(
+				initialValue,
+			);
+			const currentUniversalUnitName = getUniversalNameFromMetricUnit(value);
+			return `Unit mismatch. Saved unit is ${initialUniversalUnitName}, but ${currentUniversalUnitName} is selected.`;
+		}
+		return '';
+	}, [initialValue, value, loading]);
+
 	const handleSearch = (
 		searchTerm: string,
 		currentOption: DefaultOptionType | undefined,
@@ -49,6 +71,16 @@ function YAxisUnitSelector({
 				placeholder={placeholder}
 				filterOption={(input, option): boolean => handleSearch(input, option)}
 				loading={loading}
+				suffixIcon={
+					incompatibleUnitMessage ? (
+						<Tooltip title={incompatibleUnitMessage}>
+							<WarningFilled />
+						</Tooltip>
+					) : null
+				}
+				className={classNames({
+					'warning-state': incompatibleUnitMessage,
+				})}
 				data-testid={dataTestId}
 			>
 				{categories.map((category) => (

frontend/src/components/YAxisUnitSelector/__tests__/YAxisUnitSelector.test.tsx

@@ -91,4 +91,36 @@ describe('YAxisUnitSelector', () => {
 		expect(screen.getByText('Bytes (B)')).toBeInTheDocument();
 		expect(screen.getByText('Seconds (s)')).toBeInTheDocument();
 	});
+
+	it('shows warning message when incompatible unit is selected', () => {
+		render(
+			<YAxisUnitSelector
+				source={YAxisSource.ALERTS}
+				value="By"
+				onChange={mockOnChange}
+				initialValue="s"
+			/>,
+		);
+		const warningIcon = screen.getByLabelText('warning');
+		expect(warningIcon).toBeInTheDocument();
+		fireEvent.mouseOver(warningIcon);
+		return screen
+			.findByText(
+				'Unit mismatch. Saved unit is Seconds (s), but Bytes (B) is selected.',
+			)
+			.then((el) => expect(el).toBeInTheDocument());
+	});
+
+	it('does not show warning message when compatible unit is selected', () => {
+		render(
+			<YAxisUnitSelector
+				source={YAxisSource.ALERTS}
+				value="s"
+				onChange={mockOnChange}
+				initialValue="s"
+			/>,
+		);
+		const warningIcon = screen.queryByLabelText('warning');
+		expect(warningIcon).not.toBeInTheDocument();
+	});
 });

frontend/src/components/YAxisUnitSelector/styles.scss

@@ -3,3 +3,13 @@
 		width: 220px;
 	}
 }
+
+.warning-state {
+	.ant-select-selector {
+		border-color: var(--bg-amber-400) !important;
+	}
+
+	.anticon {
+		color: var(--bg-amber-400) !important;
+	}
+}

frontend/src/components/YAxisUnitSelector/types.ts

@@ -6,6 +6,7 @@ export interface YAxisUnitSelectorProps {
 	disabled?: boolean;
 	'data-testid'?: string;
 	source: YAxisSource;
+	initialValue?: string;
 }
 
 export enum UniversalYAxisUnit {

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/CreateAlertV2/QuerySection/ChartPreview/ChartPreview.tsx

@@ -5,7 +5,8 @@ import { useCreateAlertState } from 'container/CreateAlertV2/context';
 import ChartPreviewComponent from 'container/FormAlertRules/ChartPreview';
 import PlotTag from 'container/NewWidget/LeftContainer/WidgetGraph/PlotTag';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
-import { useState } from 'react';
+import useGetYAxisUnit from 'hooks/useGetYAxisUnit';
+import { useEffect, useState } from 'react';
 import { useSelector } from 'react-redux';
 import { AppState } from 'store/reducers';
 import { AlertDef } from 'types/api/alerts/def';
@@ -27,6 +28,17 @@ function ChartPreview({ alertDef }: ChartPreviewProps): JSX.Element {
 
 	const yAxisUnit = alertState.yAxisUnit || '';
 
+	const selectedQueryName = thresholdState.selectedQuery;
+	const { yAxisUnit: initialYAxisUnit, isLoading } = useGetYAxisUnit(
+		selectedQueryName,
+	);
+
+	useEffect(() => {
+		if (initialYAxisUnit && !yAxisUnit) {
+			setAlertState({ type: 'SET_Y_AXIS_UNIT', payload: initialYAxisUnit });
+		}
+	}, [initialYAxisUnit, setAlertState, yAxisUnit]);
+
 	const headline = (
 		<div className="chart-preview-headline">
 			<PlotTag
@@ -34,11 +46,13 @@ function ChartPreview({ alertDef }: ChartPreviewProps): JSX.Element {
 				panelType={panelType || PANEL_TYPES.TIME_SERIES}
 			/>
 			<YAxisUnitSelector
-				value={alertState.yAxisUnit}
+				value={yAxisUnit}
+				initialValue={initialYAxisUnit}
 				onChange={(value): void => {
 					setAlertState({ type: 'SET_Y_AXIS_UNIT', payload: value });
 				}}
 				source={YAxisSource.ALERTS}
+				loading={isLoading}
 			/>
 		</div>
 	);

frontend/src/container/FormAlertRules/index.tsx

@@ -6,6 +6,8 @@ import saveAlertApi from 'api/alerts/save';
 import testAlertApi from 'api/alerts/testAlert';
 import logEvent from 'api/common/logEvent';
 import { getInvolvedQueriesInTraceOperator } from 'components/QueryBuilderV2/QueryV2/TraceOperator/utils/utils';
+import YAxisUnitSelector from 'components/YAxisUnitSelector';
+import { YAxisSource } from 'components/YAxisUnitSelector/types';
 import { ALERTS_DATA_SOURCE_MAP } from 'constants/alerts';
 import { FeatureKeys } from 'constants/features';
 import { QueryParams } from 'constants/query';
@@ -14,9 +16,9 @@ import { REACT_QUERY_KEY } from 'constants/reactQueryKeys';
 import ROUTES from 'constants/routes';
 import QueryTypeTag from 'container/NewWidget/LeftContainer/QueryTypeTag';
 import PlotTag from 'container/NewWidget/LeftContainer/WidgetGraph/PlotTag';
-import { BuilderUnitsFilter } from 'container/QueryBuilder/filters';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import { useShareBuilderUrl } from 'hooks/queryBuilder/useShareBuilderUrl';
+import useGetYAxisUnit from 'hooks/useGetYAxisUnit';
 import { useNotifications } from 'hooks/useNotifications';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
@@ -786,6 +788,16 @@ function FormAlertRules({
 		featureFlags?.find((flag) => flag.name === FeatureKeys.ANOMALY_DETECTION)
 			?.active || false;
 
+	const { yAxisUnit: initialYAxisUnit, isLoading } = useGetYAxisUnit(
+		alertDef.condition.selectedQueryName,
+	);
+
+	useEffect(() => {
+		if (initialYAxisUnit && !yAxisUnit) {
+			setYAxisUnit(initialYAxisUnit);
+		}
+	}, [initialYAxisUnit, yAxisUnit]);
+
 	return (
 		<>
 			{Element}
@@ -841,9 +853,12 @@ function FormAlertRules({
 					</div>
 
 					<StepContainer>
-						<BuilderUnitsFilter
+						<YAxisUnitSelector
+							value={yAxisUnit}
+							initialValue={initialYAxisUnit}
 							onChange={onUnitChangeHandler}
-							yAxisUnit={yAxisUnit}
+							source={YAxisSource.ALERTS}
+							loading={isLoading}
 						/>
 					</StepContainer>
 

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/RightContainer/RightContainer.styles.scss

@@ -191,7 +191,8 @@
 			text-transform: uppercase;
 		}
 
-		.y-axis-unit-selector {
+		.y-axis-unit-selector,
+		.y-axis-unit-selector-v2 {
 			margin-top: 16px;
 			display: flex;
 			flex-direction: column;
@@ -224,6 +225,21 @@
 				}
 			}
 		}
+
+		.y-axis-unit-selector-v2 {
+			.y-axis-unit-selector-component {
+				.ant-select {
+					width: 100%;
+					border-radius: 2px;
+
+					.ant-select-selector {
+						border: 1px solid var(--bg-slate-400);
+						background: var(--bg-ink-300);
+					}
+				}
+			}
+		}
+
 		.soft-min-max {
 			display: flex;
 			align-items: center;

frontend/src/container/NewWidget/RightContainer/YAxisUnitSelectorV2.tsx

@@ -0,0 +1,40 @@
+import { Typography } from 'antd';
+import YAxisUnitSelectorComponent from 'components/YAxisUnitSelector';
+import { YAxisSource } from 'components/YAxisUnitSelector/types';
+import useGetYAxisUnit from 'hooks/useGetYAxisUnit';
+import { Dispatch, SetStateAction, useEffect } from 'react';
+
+type OnSelectType = Dispatch<SetStateAction<string>> | ((val: string) => void);
+function YAxisUnitSelectorV2({
+	defaultValue,
+	onSelect,
+	fieldLabel,
+}: {
+	defaultValue: string;
+	onSelect: OnSelectType;
+	fieldLabel: string;
+}): JSX.Element {
+	const { yAxisUnit: initialYAxisUnit, isLoading } = useGetYAxisUnit();
+
+	useEffect(() => {
+		if (initialYAxisUnit && (!defaultValue || defaultValue === 'none')) {
+			onSelect(initialYAxisUnit);
+		}
+		// eslint-disable-next-line react-hooks/exhaustive-deps
+	}, [initialYAxisUnit]);
+
+	return (
+		<div className="y-axis-unit-selector-v2">
+			<Typography.Text className="heading">{fieldLabel}</Typography.Text>
+			<YAxisUnitSelectorComponent
+				value={defaultValue}
+				onChange={onSelect}
+				initialValue={initialYAxisUnit}
+				source={YAxisSource.DASHBOARDS}
+				loading={isLoading}
+			/>
+		</div>
+	);
+}
+
+export default YAxisUnitSelectorV2;

frontend/src/container/NewWidget/RightContainer/index.tsx

@@ -65,7 +65,7 @@ import LegendColors from './LegendColors/LegendColors';
 import ThresholdSelector from './Threshold/ThresholdSelector';
 import { ThresholdProps } from './Threshold/types';
 import { timePreferance } from './timeItems';
-import YAxisUnitSelector from './YAxisUnitSelector';
+import YAxisUnitSelectorV2 from './YAxisUnitSelectorV2';
 
 const { TextArea } = Input;
 const { Option } = Select;
@@ -350,9 +350,9 @@ function RightContainer({
 				)}
 
 				{allowYAxisUnit && (
-					<YAxisUnitSelector
+					<YAxisUnitSelectorV2
 						onSelect={setYAxisUnit}
-						value={yAxisUnit || ''}
+						defaultValue={yAxisUnit || ''}
 						fieldLabel={
 							selectedGraphType === PanelDisplay.VALUE ||
 							selectedGraphType === PanelDisplay.PIE

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/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/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/useGetYAxisUnit.test.ts

@@ -0,0 +1,351 @@
+import { renderHook } from '@testing-library/react';
+import { useGetMetricUnits } from 'container/MetricsExplorer/Explorer/utils';
+import { Query } from 'types/api/queryBuilder/queryBuilderData';
+import { EQueryType } from 'types/common/dashboard';
+import { DataSource, QueryBuilderContextType } from 'types/common/queryBuilder';
+
+import { useQueryBuilder } from './queryBuilder/useQueryBuilder';
+import useGetYAxisUnit from './useGetYAxisUnit';
+
+jest.mock('./queryBuilder/useQueryBuilder');
+jest.mock('container/MetricsExplorer/Explorer/utils', () => ({
+	useGetMetricUnits: jest.fn(),
+}));
+
+const mockUseQueryBuilder = useQueryBuilder as jest.MockedFunction<
+	typeof useQueryBuilder
+>;
+const mockUseGetMetricUnits = useGetMetricUnits as jest.MockedFunction<
+	typeof useGetMetricUnits
+>;
+
+function createMockCurrentQuery(
+	queryType: EQueryType,
+	queryData: Query['builder']['queryData'] = [],
+): Query {
+	return {
+		queryType,
+		promql: [],
+		builder: {
+			queryData,
+			queryFormulas: [],
+			queryTraceOperator: [],
+		},
+		clickhouse_sql: [],
+		id: 'test-id',
+	};
+}
+
+describe('useGetYAxisUnit', () => {
+	beforeEach(() => {
+		jest.clearAllMocks();
+	});
+
+	it('should return undefined yAxisUnit and not call useGetMetricUnits when currentQuery is null', async () => {
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: undefined,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+		expect(result.current.isLoading).toBe(false);
+		expect(result.current.isError).toBe(false);
+		expect(mockUseGetMetricUnits).toHaveBeenCalledWith([], false);
+	});
+
+	it('should return undefined yAxisUnit when queryType is PROM', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.PROM);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+		expect(mockUseGetMetricUnits).toHaveBeenCalledWith([], false);
+	});
+
+	it('should return undefined yAxisUnit when queryType is CLICKHOUSE', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.CLICKHOUSE);
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+		expect(result.current.isLoading).toBe(false);
+		expect(result.current.isError).toBe(false);
+		expect(mockUseGetMetricUnits).toHaveBeenCalledWith([], false);
+	});
+
+	it('should return undefined yAxisUnit when dataSource is TRACES', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.TRACES,
+				aggregateAttribute: { key: 'trace_metric' },
+			} as Query['builder']['queryData'][0],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+		expect(result.current.isLoading).toBe(false);
+		expect(result.current.isError).toBe(false);
+		expect(mockUseGetMetricUnits).toHaveBeenCalledWith([], false);
+	});
+
+	it('should return undefined yAxisUnit when dataSource is LOGS', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.LOGS,
+				aggregateAttribute: { key: 'log_metric' },
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+		expect(result.current.isLoading).toBe(false);
+		expect(result.current.isError).toBe(false);
+		expect(mockUseGetMetricUnits).toHaveBeenCalledWith([], false);
+	});
+
+	it('should extract all metric names from queryData', () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric1' },
+				queryName: 'query1',
+			} as Query['builder']['queryData'][number],
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric2' },
+				queryName: 'query2',
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		renderHook(() => useGetYAxisUnit());
+
+		expect(mockUseGetMetricUnits).toHaveBeenCalledWith(
+			['metric1', 'metric2'],
+			true,
+		);
+	});
+
+	it('should extract metric name for the selected query only', () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric1' },
+				queryName: 'query1',
+			} as Query['builder']['queryData'][number],
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric2' },
+				queryName: 'query2',
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		renderHook(() => useGetYAxisUnit('query2'));
+
+		expect(mockUseGetMetricUnits).toHaveBeenCalledWith(['metric2'], true);
+	});
+
+	it('should return undefined when units array is empty', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric1' },
+				queryName: 'query1',
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+	});
+
+	it('should return the unit when there is a single non-empty unit', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric1' },
+				queryName: 'query1',
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		mockUseGetMetricUnits.mockReturnValue({
+			units: ['bytes'],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBe('bytes');
+	});
+
+	it('should return undefined when there is a single empty unit', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric1' },
+				queryName: 'query1',
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		mockUseGetMetricUnits.mockReturnValue({
+			units: [''],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+	});
+
+	it('should return the unit when all units are the same and non-empty', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric1' },
+				queryName: 'query1',
+			} as Query['builder']['queryData'][number],
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric2' },
+				queryName: 'query2',
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		mockUseGetMetricUnits.mockReturnValue({
+			units: ['bytes', 'bytes'],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBe('bytes');
+	});
+
+	it('should return undefined when units are different', async () => {
+		const mockCurrentQuery = createMockCurrentQuery(EQueryType.QUERY_BUILDER, [
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric2' },
+				queryName: 'query2',
+			} as Query['builder']['queryData'][number],
+			{
+				dataSource: DataSource.METRICS,
+				aggregateAttribute: { key: 'metric3' },
+				queryName: 'query3',
+			} as Query['builder']['queryData'][number],
+		]);
+
+		mockUseQueryBuilder.mockReturnValue(({
+			currentQuery: mockCurrentQuery,
+		} as Partial<QueryBuilderContextType>) as QueryBuilderContextType);
+
+		mockUseGetMetricUnits.mockReturnValue({
+			units: ['bytes', 'seconds'],
+			isLoading: false,
+			isError: false,
+			metrics: [],
+		});
+
+		const { result } = renderHook(() => useGetYAxisUnit());
+
+		expect(result.current.yAxisUnit).toBeUndefined();
+	});
+});

frontend/src/hooks/useGetYAxisUnit.ts

@@ -0,0 +1,81 @@
+import { useGetMetricUnits } from 'container/MetricsExplorer/Explorer/utils';
+import { useEffect, useMemo, useState } from 'react';
+import { EQueryType } from 'types/common/dashboard';
+import { DataSource } from 'types/common/queryBuilder';
+
+import { useQueryBuilder } from './queryBuilder/useQueryBuilder';
+
+interface UseGetYAxisUnitResult {
+	yAxisUnit: string | undefined;
+	isLoading: boolean;
+	isError: boolean;
+}
+
+function useGetYAxisUnit(selectedQueryName?: string): UseGetYAxisUnitResult {
+	const { currentQuery } = useQueryBuilder();
+	const [yAxisUnit, setYAxisUnit] = useState<string | undefined>();
+
+	const metricNames: string[] | null = useMemo(() => {
+		if (currentQuery?.queryType !== EQueryType.QUERY_BUILDER) {
+			return null;
+		}
+		const dataSource = currentQuery?.builder?.queryData?.[0]?.dataSource;
+		if (dataSource !== DataSource.METRICS) {
+			return null;
+		}
+		// If a selected query name is provided, return the metric name for that query only
+		if (selectedQueryName) {
+			const currentMetricNames: string[] = [];
+			currentQuery?.builder?.queryData?.forEach((query) => {
+				if (
+					query.queryName === selectedQueryName &&
+					query.aggregateAttribute?.key
+				) {
+					currentMetricNames.push(query.aggregateAttribute?.key);
+				}
+			});
+			return currentMetricNames.length ? currentMetricNames : null;
+		}
+		const currentMetricNames: string[] = [];
+		currentQuery?.builder?.queryData?.forEach((query) => {
+			if (query.aggregateAttribute?.key) {
+				currentMetricNames.push(query.aggregateAttribute?.key);
+			}
+		});
+		return currentMetricNames.length ? currentMetricNames : null;
+	}, [
+		selectedQueryName,
+		currentQuery?.builder?.queryData,
+		currentQuery?.queryType,
+	]);
+
+	const { units, isLoading, isError } = useGetMetricUnits(
+		metricNames ?? [],
+		!!metricNames,
+	);
+
+	const areAllMetricUnitsSame = useMemo(
+		() => units.every((unit) => unit === units[0]),
+		[units],
+	);
+
+	useEffect(() => {
+		if (units.length === 0) {
+			setYAxisUnit(undefined);
+		} else if (units.length === 1 && units[0] !== '') {
+			setYAxisUnit(units[0]);
+		} else if (areAllMetricUnitsSame) {
+			if (units[0] !== '') {
+				setYAxisUnit(units[0]);
+			} else {
+				setYAxisUnit(undefined);
+			}
+		} else if (units.length > 1 && !areAllMetricUnitsSame) {
+			setYAxisUnit(undefined);
+		}
+	}, [units, areAllMetricUnitsSame]);
+
+	return { yAxisUnit, isLoading, isError };
+}
+
+export default useGetYAxisUnit;

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;
+}