From 3f6cd1f18827a3271b38b96c6154010b26fbd1bc Mon Sep 17 00:00:00 2001
From: Saxon Fletcher <saxonafletcher@gmail.com>
Date: Wed, 25 Mar 2026 19:23:46 +1000
Subject: [PATCH] error rates in functions list (#44006)

<img width="1835" height="886" alt="image"
src="https://github.com/user-attachments/assets/c4ab5be6-cddc-49b3-8d09-169acb706a20"
/>

Adds total request and error rate columns to edge functions table behind
a feature flag

---------

Co-authored-by: Copilot <198982749+Copilot@users.noreply.github.com>
Co-authored-by: SaxonF <1072756+SaxonF@users.noreply.github.com>
Co-authored-by: Joshen Lim <joshenlimek@gmail.com>
---
 .../Functions/EdgeFunctionsListItem.tsx       |  83 ++++++++++--
 .../EdgeFunctionsListItem.utils.test.ts       |  25 ++++
 .../Functions/EdgeFunctionsListItem.utils.ts  |  20 +++
 ...ge-functions-last-hour-stats-query.test.ts | 104 +++++++++++++++
 .../edge-functions-last-hour-stats-query.ts   | 119 ++++++++++++++++++
 apps/studio/data/edge-functions/keys.ts       |  11 ++
 .../pages/project/[ref]/functions/index.tsx   |  26 ++--
 7 files changed, 373 insertions(+), 15 deletions(-)
 create mode 100644 apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.test.ts
 create mode 100644 apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.ts
 create mode 100644 apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.test.ts
 create mode 100644 apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.ts

diff --git a/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.tsx b/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.tsx
index 3aa2091400c..c913b150311 100644
--- a/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.tsx
+++ b/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.tsx
@@ -3,12 +3,19 @@ import { useParams } from 'common/hooks'
 import dayjs from 'dayjs'
 import { Check, Copy } from 'lucide-react'
 import { useRouter } from 'next/router'
-import { useState } from 'react'
-import { copyToClipboard, TableCell, TableRow } from 'ui'
-import { TimestampInfo } from 'ui-patterns'
+import { useMemo, useState, type MouseEvent } from 'react'
+import { cn, copyToClipboard, TableCell, TableRow } from 'ui'
+import { ShimmeringLoader, TimestampInfo } from 'ui-patterns'
 
+import { formatErrorRate } from './EdgeFunctionsListItem.utils'
 import { useProjectApiUrl } from '@/data/config/project-endpoint-query'
-import type { EdgeFunctionsResponse } from '@/data/edge-functions/edge-functions-query'
+import { useEdgeFunctionsLastHourStatsQuery } from '@/data/edge-functions/edge-functions-last-hour-stats-query'
+import {
+  useEdgeFunctionsQuery,
+  type EdgeFunctionsResponse,
+} from '@/data/edge-functions/edge-functions-query'
+import { normalizeFunctionIds } from '@/data/edge-functions/keys'
+import { usePHFlag } from '@/hooks/ui/useFlag'
 import { createNavigationHandler } from '@/lib/navigation'
 
 interface EdgeFunctionsListItemProps {
@@ -20,6 +27,9 @@ export const EdgeFunctionsListItem = ({ function: item }: EdgeFunctionsListItemP
   const { ref } = useParams()
   const [isCopied, setIsCopied] = useState(false)
 
+  const showEdgeFunctionsRequestMetrics = usePHFlag<boolean>('edgeFunctionsRequestMetrics') === true
+  const showLastHourStats = IS_PLATFORM && showEdgeFunctionsRequestMetrics
+
   const { data: endpoint } = useProjectApiUrl({ projectRef: ref })
   const functionUrl = `${endpoint}/functions/v1/${item.slug}`
 
@@ -28,6 +38,24 @@ export const EdgeFunctionsListItem = ({ function: item }: EdgeFunctionsListItemP
     router
   )
 
+  const { data: functions } = useEdgeFunctionsQuery({ projectRef: ref })
+  const functionIds = useMemo(() => {
+    if (!showLastHourStats || !functions) return []
+    return normalizeFunctionIds(functions.map((item) => item.id))
+  }, [functions, showLastHourStats])
+
+  // [Joshen] We may be paginating the edge functions query in the future
+  // So this will eventually need to be a list of visibleFunctionIds instead + debounced
+  const {
+    data: lastHourStatsAll,
+    isPending: isStatsPending,
+    isError: isStatsError,
+  } = useEdgeFunctionsLastHourStatsQuery(
+    { projectRef: ref, functionIds },
+    { enabled: showLastHourStats }
+  )
+  const lastHourStats = lastHourStatsAll?.[item.id]
+
   return (
     <TableRow
       key={item.id}
@@ -48,8 +76,8 @@ export const EdgeFunctionsListItem = ({ function: item }: EdgeFunctionsListItemP
           <button
             type="button"
             className="text-foreground-lighter hover:text-foreground transition"
-            onClick={(event: any) => {
-              function onCopy(value: any) {
+            onClick={(event: MouseEvent<HTMLButtonElement>) => {
+              function onCopy(value: string) {
                 setIsCopied(true)
                 copyToClipboard(value)
                 setTimeout(() => setIsCopied(false), 3000)
@@ -86,7 +114,48 @@ export const EdgeFunctionsListItem = ({ function: item }: EdgeFunctionsListItemP
           label={dayjs(item.updated_at).fromNow()}
         />
       </TableCell>
-      <TableCell className="lg:table-cell">
+      {showLastHourStats && (
+        <>
+          <TableCell className="lg:table-cell whitespace-nowrap">
+            {isStatsPending ? (
+              <ShimmeringLoader className="w-12" />
+            ) : isStatsError ? (
+              <p className="text-foreground-lighter" title="Failed to load stats">
+                -
+              </p>
+            ) : (
+              <p className="text-foreground-light">
+                {lastHourStats !== undefined ? lastHourStats.requestsCount.toLocaleString() : '-'}
+              </p>
+            )}
+          </TableCell>
+          <TableCell className="lg:table-cell whitespace-nowrap">
+            {isStatsPending ? (
+              <ShimmeringLoader className="w-12" />
+            ) : isStatsError ? (
+              <p className="text-foreground-lighter" title="Failed to load stats">
+                -
+              </p>
+            ) : lastHourStats !== undefined ? (
+              <span
+                className={cn(
+                  'text-sm',
+                  lastHourStats.errorRate >= 1
+                    ? 'text-destructive'
+                    : lastHourStats.errorRate > 0.1
+                      ? 'text-warning'
+                      : 'text-foreground-light'
+                )}
+              >
+                {formatErrorRate(lastHourStats.errorRate)}
+              </span>
+            ) : (
+              <p className="text-foreground-lighter">-</p>
+            )}
+          </TableCell>
+        </>
+      )}
+      <TableCell className="hidden 2xl:table-cell">
         <p className="text-foreground-light">{item.version}</p>
         <button tabIndex={-1} className="sr-only">
           Go to function details
diff --git a/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.test.ts b/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.test.ts
new file mode 100644
index 00000000000..ce9eeceff63
--- /dev/null
+++ b/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.test.ts
@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest'
+
+import { formatErrorRate } from './EdgeFunctionsListItem.utils'
+
+describe('formatErrorRate', () => {
+  it.each([
+    { value: 0, expected: '0%' },
+    { value: 100, expected: '100%' },
+    { value: 101, expected: '100%' },
+    { value: 200, expected: '100%' },
+    { value: 0.05, expected: '<0.1%' },
+    { value: 0.001, expected: '<0.1%' },
+    { value: 0.099, expected: '<0.1%' },
+    { value: 0.1, expected: '0.1%' },
+    { value: 1.0, expected: '1.0%' },
+    { value: 1.567, expected: '1.6%' },
+    { value: 50, expected: '50.0%' },
+    { value: 99.9, expected: '99.9%' },
+    { value: 99.99, expected: '100%' },
+    { value: 1.55, expected: '1.6%' },
+    { value: 1.54, expected: '1.5%' },
+  ])('formats $value as $expected', ({ value, expected }) => {
+    expect(formatErrorRate(value)).toBe(expected)
+  })
+})
diff --git a/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.ts b/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.ts
new file mode 100644
index 00000000000..147ccb0e80d
--- /dev/null
+++ b/apps/studio/components/interfaces/Functions/EdgeFunctionsListItem.utils.ts
@@ -0,0 +1,20 @@
+/**
+ * Formats a numeric error rate (0–100) into a display string.
+ *
+ * Examples:
+ *   0      → "0%"
+ *   0.05   → "<0.1%"
+ *   0.1    → "0.1%"
+ *   1.567  → "1.6%"
+ *   100    → "100%"
+ */
+export function formatErrorRate(value: number): string {
+  if (value === 0) return '0%'
+  if (value >= 100) return '100%'
+  if (value < 0.1) return '<0.1%'
+
+  const rounded = Number(value.toFixed(1))
+  const clamped = Math.min(rounded, 100)
+  if (clamped >= 100) return '100%'
+  return `${clamped.toFixed(1)}%`
+}
diff --git a/apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.test.ts b/apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.test.ts
new file mode 100644
index 00000000000..eafa136ebbf
--- /dev/null
+++ b/apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.test.ts
@@ -0,0 +1,104 @@
+import { post } from 'data/fetchers'
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+
+import { getEdgeFunctionsLastHourStats } from './edge-functions-last-hour-stats-query'
+
+vi.mock('data/fetchers', () => ({
+  post: vi.fn(),
+  handleError: vi.fn(),
+}))
+
+type PostResponse = Awaited<ReturnType<typeof post>>
+
+describe('getEdgeFunctionsLastHourStats', () => {
+  beforeEach(() => {
+    vi.useFakeTimers()
+    vi.setSystemTime(new Date('2024-01-15T12:00:00.000Z'))
+    vi.mocked(post).mockReset()
+  })
+
+  afterEach(() => {
+    vi.useRealTimers()
+  })
+
+  it('requests last-hour function stats from logs.all', async () => {
+    vi.mocked(post).mockResolvedValue({ data: { result: [] }, error: null } as PostResponse)
+
+    await getEdgeFunctionsLastHourStats({
+      projectRef: 'project-ref',
+      functionIds: ['fn_1', 'fn_2'],
+    })
+
+    expect(post).toHaveBeenCalledWith('/platform/projects/{ref}/analytics/endpoints/logs.all', {
+      params: {
+        path: { ref: 'project-ref' },
+        query: { key: 'last-hour-stats' },
+      },
+      body: expect.objectContaining({
+        sql: expect.stringContaining(`and function_id in ('fn_1', 'fn_2')`),
+        iso_timestamp_start: '2024-01-15T11:00:00.000Z',
+        iso_timestamp_end: '2024-01-15T12:00:00.000Z',
+      }),
+      signal: undefined,
+    })
+
+    const postCalls = vi.mocked(post).mock.calls as Array<
+      [string, { body?: { sql?: string } } | undefined]
+    >
+
+    expect(postCalls[0]?.[1]?.body?.sql).toContain('from\n  function_edge_logs')
+  })
+
+  it('coerces counts to numbers and computes error rates per function', async () => {
+    vi.mocked(post).mockResolvedValue({
+      data: {
+        result: [
+          { function_id: 'fn_1', requests_count: '100', server_err_count: '5' },
+          { function_id: 'fn_2', requests_count: 8, server_err_count: 0 },
+        ],
+      },
+      error: null,
+    } as PostResponse)
+
+    const result = await getEdgeFunctionsLastHourStats({
+      projectRef: 'project-ref',
+      functionIds: ['fn_1', 'fn_2'],
+    })
+
+    expect(result).toEqual({
+      fn_1: {
+        functionId: 'fn_1',
+        requestsCount: 100,
+        serverErrorCount: 5,
+        errorRate: 5,
+      },
+      fn_2: {
+        functionId: 'fn_2',
+        requestsCount: 8,
+        serverErrorCount: 0,
+        errorRate: 0,
+      },
+    })
+  })
+
+  it('handles empty results', async () => {
+    vi.mocked(post).mockResolvedValue({ data: { result: [] }, error: null } as PostResponse)
+
+    const result = await getEdgeFunctionsLastHourStats({
+      projectRef: 'project-ref',
+      functionIds: ['fn_1'],
+    })
+
+    expect(result).toEqual({})
+  })
+
+  it('skips the logs query when there are no function ids', async () => {
+    const result = await getEdgeFunctionsLastHourStats({
+      projectRef: 'project-ref',
+      functionIds: [],
+    })
+
+    expect(result).toEqual({})
+    expect(post).not.toHaveBeenCalled()
+  })
+})
diff --git a/apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.ts b/apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.ts
new file mode 100644
index 00000000000..3c2f2bc1314
--- /dev/null
+++ b/apps/studio/data/edge-functions/edge-functions-last-hour-stats-query.ts
@@ -0,0 +1,119 @@
+import { useQuery } from '@tanstack/react-query'
+import { handleError, post } from 'data/fetchers'
+import dayjs from 'dayjs'
+import { quoteLiteral } from 'lib/pg-format'
+import type { ResponseError, UseCustomQueryOptions } from 'types'
+
+import { edgeFunctionsKeys } from './keys'
+
+export type EdgeFunctionsLastHourStatsVariables = { projectRef?: string; functionIds?: string[] }
+
+export type EdgeFunctionLastHourStats = {
+  functionId: string
+  requestsCount: number
+  serverErrorCount: number
+  errorRate: number
+}
+
+export type EdgeFunctionsLastHourStatsResponse = Record<string, EdgeFunctionLastHourStats>
+
+function getEdgeFunctionsLastHourStatsSql(functionIds: string[]) {
+  const functionIdFilter =
+    functionIds.length > 0
+      ? `  and function_id in (${functionIds.map(quoteLiteral).join(', ')})\n`
+      : ''
+
+  return `
+-- edge-functions-last-hour-stats
+select
+  function_id,
+  count(distinct id) as requests_count,
+  count(distinct case when response.status_code >= 500 then id end) as server_err_count
+from
+  function_edge_logs
+  cross join unnest(metadata) as m
+  cross join unnest(m.response) as response
+where
+  function_id is not null
+${functionIdFilter}group by
+  function_id
+`
+}
+
+export async function getEdgeFunctionsLastHourStats(
+  { projectRef, functionIds = [] }: EdgeFunctionsLastHourStatsVariables,
+  signal?: AbortSignal
+) {
+  if (!projectRef) throw new Error('projectRef is required')
+  if (functionIds.length === 0) return {}
+
+  const endDate = dayjs().toISOString()
+  const startDate = dayjs().subtract(1, 'hour').toISOString()
+
+  const { data, error } = await post(`/platform/projects/{ref}/analytics/endpoints/logs.all`, {
+    params: {
+      path: { ref: projectRef },
+      // @ts-ignore [Joshen] Just to easily identify this request in the network tools
+      query: { key: 'last-hour-stats' },
+    },
+    body: {
+      sql: getEdgeFunctionsLastHourStatsSql(functionIds),
+      iso_timestamp_start: startDate,
+      iso_timestamp_end: endDate,
+    },
+    signal,
+  })
+
+  if (error || data?.error) {
+    handleError(error ?? data?.error)
+  }
+
+  const result = (data?.result ?? []) as {
+    function_id: string
+    requests_count: number | string
+    server_err_count: number | string
+  }[]
+
+  return result.reduce<EdgeFunctionsLastHourStatsResponse>((acc, row) => {
+    const toSafeNumber = (v: number | string | undefined) => {
+      const n = Number(v ?? 0)
+      return Number.isFinite(n) ? n : 0
+    }
+    const safeRequestsCount = toSafeNumber(row.requests_count)
+    const safeServerErrorCount = toSafeNumber(row.server_err_count)
+
+    acc[row.function_id] = {
+      functionId: row.function_id,
+      requestsCount: safeRequestsCount,
+      serverErrorCount: safeServerErrorCount,
+      errorRate: safeRequestsCount > 0 ? (safeServerErrorCount / safeRequestsCount) * 100 : 0,
+    }
+
+    return acc
+  }, {})
+}
+
+export type EdgeFunctionsLastHourStatsData = Awaited<
+  ReturnType<typeof getEdgeFunctionsLastHourStats>
+>
+export type EdgeFunctionsLastHourStatsError = ResponseError
+
+export const useEdgeFunctionsLastHourStatsQuery = <TData = EdgeFunctionsLastHourStatsData>(
+  { projectRef, functionIds = [] }: EdgeFunctionsLastHourStatsVariables,
+  {
+    enabled = true,
+    ...options
+  }: UseCustomQueryOptions<
+    EdgeFunctionsLastHourStatsData,
+    EdgeFunctionsLastHourStatsError,
+    TData
+  > = {}
+) =>
+  useQuery<EdgeFunctionsLastHourStatsData, EdgeFunctionsLastHourStatsError, TData>({
+    queryKey: edgeFunctionsKeys.lastHourStats(projectRef, functionIds),
+    queryFn: ({ signal }) => getEdgeFunctionsLastHourStats({ projectRef, functionIds }, signal),
+    enabled: enabled && typeof projectRef !== 'undefined' && functionIds.length > 0,
+    staleTime: 60 * 1000,
+    retry: false,
+    ...options,
+  })
diff --git a/apps/studio/data/edge-functions/keys.ts b/apps/studio/data/edge-functions/keys.ts
index 4ee447534a3..1b13ea0eba7 100644
--- a/apps/studio/data/edge-functions/keys.ts
+++ b/apps/studio/data/edge-functions/keys.ts
@@ -1,5 +1,16 @@
+export const normalizeFunctionIds = (functionIds: string[]): string[] =>
+  Array.from(new Set(functionIds)).sort()
+
 export const edgeFunctionsKeys = {
   list: (projectRef: string | undefined) => ['projects', projectRef, 'edge-functions'] as const,
+  lastHourStats: (projectRef: string | undefined, functionIds: string[] = []) =>
+    [
+      'projects',
+      projectRef,
+      'edge-functions',
+      'last-hour-stats',
+      normalizeFunctionIds(functionIds),
+    ] as const,
   detail: (projectRef: string | undefined, slug: string | undefined) =>
     ['projects', projectRef, 'edge-function', slug, 'detail'] as const,
   body: (projectRef: string | undefined, slug: string | undefined) =>
diff --git a/apps/studio/pages/project/[ref]/functions/index.tsx b/apps/studio/pages/project/[ref]/functions/index.tsx
index 763ed65e1a1..e1e4a9f0fba 100644
--- a/apps/studio/pages/project/[ref]/functions/index.tsx
+++ b/apps/studio/pages/project/[ref]/functions/index.tsx
@@ -18,6 +18,7 @@ import EdgeFunctionsLayout from 'components/layouts/EdgeFunctionsLayout/EdgeFunc
 import AlertError from 'components/ui/AlertError'
 import { DocsButton } from 'components/ui/DocsButton'
 import { useEdgeFunctionsQuery } from 'data/edge-functions/edge-functions-query'
+import { usePHFlag } from 'hooks/ui/useFlag'
 import { DOCS_URL, IS_PLATFORM } from 'lib/constants'
 import { ExternalLink, Search, X } from 'lucide-react'
 import { parseAsString, parseAsStringLiteral, useQueryState } from 'nuqs'
@@ -40,6 +41,15 @@ import { GenericSkeletonLoader } from 'ui-patterns/ShimmeringLoader'
 
 const EdgeFunctionsPage: NextPageWithLayout = () => {
   const { ref } = useParams()
+  const showEdgeFunctionsRequestMetrics = usePHFlag<boolean>('edgeFunctionsRequestMetrics') === true
+  const showLastHourStats = IS_PLATFORM && showEdgeFunctionsRequestMetrics
+
+  const [search, setSearch] = useQueryState('search', parseAsString.withDefault(''))
+  const [sort, setSortQueryParam] = useQueryState(
+    'sort',
+    parseAsStringLiteral<EdgeFunctionsSort>(EDGE_FUNCTIONS_SORT_VALUES).withDefault('name:asc')
+  )
+
   const {
     data: functions,
     error,
@@ -48,12 +58,6 @@ const EdgeFunctionsPage: NextPageWithLayout = () => {
     isSuccess,
   } = useEdgeFunctionsQuery({ projectRef: ref })
 
-  const [search, setSearch] = useQueryState('search', parseAsString.withDefault(''))
-  const [sort, setSortQueryParam] = useQueryState(
-    'sort',
-    parseAsStringLiteral<EdgeFunctionsSort>(EDGE_FUNCTIONS_SORT_VALUES).withDefault('name:asc')
-  )
-
   const filteredFunctions = useMemo(() => {
     const temp = (functions ?? []).filter((x) =>
       x.name.toLowerCase().includes(search.toLowerCase())
@@ -142,7 +146,13 @@ const EdgeFunctionsPage: NextPageWithLayout = () => {
                             <TableHead>URL</TableHead>
                             <TableHead className="hidden 2xl:table-cell">Created</TableHead>
                             <TableHead className="lg:table-cell">Updated</TableHead>
-                            <TableHead className="lg:table-cell">Deployments</TableHead>
+                            {showLastHourStats && (
+                              <>
+                                <TableHead className="lg:table-cell">Total requests (1h)</TableHead>
+                                <TableHead className="lg:table-cell">5xx error rate (1h)</TableHead>
+                              </>
+                            )}
+                            <TableHead className="hidden 2xl:table-cell">Deployments</TableHead>
                           </TableRow>
                         </TableHeader>
 
@@ -154,7 +164,7 @@ const EdgeFunctionsPage: NextPageWithLayout = () => {
                               ))
                             ) : (
                               <TableRow>
-                                <TableCell colSpan={5}>
+                                <TableCell colSpan={showLastHourStats ? 7 : 5}>
                                   <p className="text-sm text-foreground">No results found</p>
                                   <p className="text-sm text-foreground-light">
                                     Your search for "{search}" did not return any results