Fetch and display full query stats in hover tooltip in table query tab (#16723)

Fixes https://github.com/prometheus/prometheus/issues/5857

Signed-off-by: Julius Volz <julius.volz@gmail.com>

web/ui/mantine-ui/src/api/responseTypes/query.ts

@@ -23,9 +23,14 @@ export interface RangeSamples {
 export type SampleValue = [number, string];
 export type SampleHistogram = [number, Histogram];
 
+export type QueryStats = {
+  timings: Record<string, number>;
+  samples: Record<string, number>;
+};
+
 // Result type for /api/v1/query endpoint.
 // See: https://prometheus.io/docs/prometheus/latest/querying/api/#instant-queries
-export type InstantQueryResult =
+export type InstantQueryResult = (
   | {
       resultType: "vector";
       result: InstantSample[];
@@ -41,11 +46,13 @@ export type InstantQueryResult =
   | {
       resultType: "string";
       result: SampleValue;
-    };
+    }
+) & { stats?: QueryStats };
 
 // Result type for /api/v1/query_range endpoint.
 // See: https://prometheus.io/docs/prometheus/latest/querying/api/#range-queries
 export type RangeQueryResult = {
   resultType: "matrix";
   result: RangeSamples[];
+  stats?: QueryStats;
 };

web/ui/mantine-ui/src/pages/query/QueryStatsDisplay.tsx

@@ -0,0 +1,49 @@
+import { FC } from "react";
+import { Box, Text, Tooltip, Table } from "@mantine/core";
+import { QueryStats } from "../../api/responseTypes/query";
+
+const statsTable = (stats: Record<string, number>) => {
+  return (
+    <Table withRowBorders={false}>
+      <Table.Tbody>
+        {Object.entries(stats).map(([k, v]) => (
+          <Table.Tr key={k}>
+            <Table.Td pl={0} py={3} c="dimmed">
+              {k}
+            </Table.Td>
+            <Table.Td pr={0} py={3} ta="right">
+              {v}
+            </Table.Td>
+          </Table.Tr>
+        ))}
+      </Table.Tbody>
+    </Table>
+  );
+};
+
+const QueryStatsDisplay: FC<{
+  numResults: number;
+  responseTime: number;
+  stats: QueryStats;
+}> = ({ numResults, responseTime, stats }) => {
+  return (
+    <Tooltip
+      label={
+        <Box p="xs">
+          <Text mb="xs">Timing stats (s):</Text>
+          {statsTable(stats.timings)}
+          <Text mt="sm" mb="xs">
+            Sample stats:
+          </Text>
+          {statsTable(stats.samples)}
+        </Box>
+      }
+    >
+      <Text size="xs" c="gray">
+        Load time: {responseTime}ms &ensp; Result series: {numResults}
+      </Text>
+    </Tooltip>
+  );
+};
+
+export default QueryStatsDisplay;

web/ui/mantine-ui/src/pages/query/TableTab.tsx

@@ -1,5 +1,5 @@
 import { FC, useEffect, useId, useLayoutEffect, useState } from "react";
-import { Alert, Skeleton, Box, Group, Stack, Text } from "@mantine/core";
+import { Alert, Skeleton, Box, Group, Stack } from "@mantine/core";
 import { IconAlertTriangle, IconInfoCircle } from "@tabler/icons-react";
 import { InstantQueryResult } from "../../api/responseTypes/query";
 import { useAPIQuery } from "../../api/api";
@@ -9,6 +9,7 @@ import { useAppDispatch, useAppSelector } from "../../state/hooks";
 import { setVisualizer } from "../../state/queryPageSlice";
 import TimeInput from "./TimeInput";
 import DataTable from "./DataTable";
+import QueryStatsDisplay from "./QueryStatsDisplay";
 dayjs.extend(timezone);
 
 export interface TableTabProps {
@@ -34,6 +35,7 @@ const TableTab: FC<TableTabProps> = ({ panelIdx, retriggerIdx, expr }) => {
     params: {
       query: expr,
       time: `${(endTime !== null ? endTime : Date.now()) / 1000}`,
+      stats: "true",
     },
     enabled: expr !== "",
     recordResponseTime: setResponseTime,
@@ -66,10 +68,11 @@ const TableTab: FC<TableTabProps> = ({ panelIdx, retriggerIdx, expr }) => {
           }
         />
         {!isFetching && data !== undefined && (
-          <Text size="xs" c="gray">
-            Load time: {responseTime}ms &ensp; Result series:{" "}
-            {data.data.result.length}
-          </Text>
+          <QueryStatsDisplay
+            numResults={data.data.result.length}
+            responseTime={responseTime}
+            stats={data.data.stats!}
+          />
         )}
       </Group>
       {isFetching ? (