From 5a0e74eec60eb4ea2dcafdea9ada773cca0a987a Mon Sep 17 00:00:00 2001
From: amwps290 <huangning0722@163.com>
Date: Tue, 15 Sep 2026 17:39:59 +0800
Subject: [PATCH] feat(query): jump to PostgreSQL error position from result
 messages

---
 .../components/common/QueryErrorActions.vue   |  10 +-
 .../__tests__/QueryErrorActions.spec.ts       |  32 +-
 .../src/components/editor/QueryEditor.vue     |  12 +
 .../src/components/layout/ContentArea.vue     |  93 ++-
 .../src/components/layout/EditorGroup.vue     |   1 +
 .../components/layout/QueryEditorSurface.vue  |   1 +
 .../components/layout/QueryResultSurface.vue  |   1 +
 .../components/layout/SqlEditorWorkspace.vue  |  13 +
 .../src/components/layout/querySurfaces.ts    |   3 +
 .../src/i18n/__tests__/backendErrors.spec.ts  |  52 ++
 apps/desktop/src/i18n/locales/az.ts           |   3 +
 apps/desktop/src/i18n/locales/en.ts           |   3 +
 apps/desktop/src/i18n/locales/es.ts           |   3 +
 apps/desktop/src/i18n/locales/it.ts           |   3 +
 apps/desktop/src/i18n/locales/ja.ts           |   3 +
 apps/desktop/src/i18n/locales/ko.ts           |   3 +
 apps/desktop/src/i18n/locales/pt-BR.ts        |   3 +
 apps/desktop/src/i18n/locales/tr.ts           |   3 +
 apps/desktop/src/i18n/locales/zh-CN.ts        |   3 +
 apps/desktop/src/i18n/locales/zh-TW.ts        |   3 +
 .../lib/__tests__/sql/errorPosition.spec.ts   | 188 ++++++
 apps/desktop/src/lib/backend/errorUtils.ts    |  51 +-
 apps/desktop/src/lib/sql/errorPosition.ts     | 245 +++++++
 .../src/lib/tabs/contentSurfaceEvents.ts      |   1 +
 apps/desktop/src/lib/tabs/tabPresentation.ts  |   5 +
 .../queryStore.multiStatementError.spec.ts    |  33 +
 apps/desktop/src/stores/queryStore.ts         |  52 +-
 apps/desktop/src/types/database.ts            |   7 +
 crates/dbx-core/src/backend_error.rs          |  53 +-
 crates/dbx-core/src/db/postgres.rs            |  26 +-
 crates/dbx-core/src/lib.rs                    |   1 +
 crates/dbx-core/src/query.rs                  | 104 ++-
 crates/dbx-core/src/sql_error_position.rs     | 255 ++++++++
 .../tests/live_postgres_error_position.rs     | 233 +++++++
 docs/backend-error-handling.md                |   4 +-
 docs/pg-error-position-locate-plan.md         | 596 ++++++++++++++++++
 36 files changed, 2079 insertions(+), 23 deletions(-)
 create mode 100644 apps/desktop/src/lib/__tests__/sql/errorPosition.spec.ts
 create mode 100644 apps/desktop/src/lib/sql/errorPosition.ts
 create mode 100644 crates/dbx-core/src/sql_error_position.rs
 create mode 100644 crates/dbx-core/tests/live_postgres_error_position.rs
 create mode 100644 docs/pg-error-position-locate-plan.md

diff --git a/apps/desktop/src/components/common/QueryErrorActions.vue b/apps/desktop/src/components/common/QueryErrorActions.vue
index edb9f6b381..2af1c1613d 100644
--- a/apps/desktop/src/components/common/QueryErrorActions.vue
+++ b/apps/desktop/src/components/common/QueryErrorActions.vue
@@ -1,6 +1,6 @@
 <script setup lang="ts">
 import { computed } from "vue";
-import { Bot, Wrench } from "@lucide/vue";
+import { Bot, LocateFixed, Wrench } from "@lucide/vue";
 import { useI18n } from "vue-i18n";
 import { Button } from "@/components/ui/button";
 import type { BackendError } from "@/lib/backend/errorUtils";
@@ -10,20 +10,28 @@ const props = defineProps<{
   errorMessage: string;
   backendError?: BackendError;
   connectionId?: string;
+  /** Driver-reported error position, when the backend provides one. */
+  errorPosition?: { line: number; column: number };
 }>();
 
 const emit = defineEmits<{
   changeConnectionTimeout: [];
   changeQueryTimeout: [];
   fixWithAi: [errorMessage: string];
+  locateError: [];
 }>();
 
 const { t } = useI18n();
 const showConnectionTimeout = computed(() => !!props.connectionId && isConnectionTimeoutErrorMessage(props.errorMessage, props.backendError));
 const showQueryTimeout = computed(() => !!props.connectionId && !showConnectionTimeout.value && isQueryTimeoutErrorMessage(props.errorMessage, props.backendError));
+const showLocateError = computed(() => !!props.errorPosition);
 </script>
 
 <template>
+  <Button v-if="showLocateError" variant="outline" size="sm" class="h-7 gap-1.5 px-2.5 text-xs" @click="emit('locateError')">
+    <LocateFixed class="h-3.5 w-3.5" />
+    {{ t("editor.locateError", { line: errorPosition!.line, column: errorPosition!.column }) }}
+  </Button>
   <Button v-if="showConnectionTimeout" variant="outline" size="sm" class="h-7 gap-1.5 px-2.5 text-xs" @click="emit('changeConnectionTimeout')">
     <Wrench class="h-3.5 w-3.5" />
     {{ t("editor.changeConnectionTimeout") }}
diff --git a/apps/desktop/src/components/common/__tests__/QueryErrorActions.spec.ts b/apps/desktop/src/components/common/__tests__/QueryErrorActions.spec.ts
index 94d902eeaa..0bb9af5ba9 100644
--- a/apps/desktop/src/components/common/__tests__/QueryErrorActions.spec.ts
+++ b/apps/desktop/src/components/common/__tests__/QueryErrorActions.spec.ts
@@ -7,17 +7,26 @@ import i18n from "@/i18n";
 
 const mountedApps: App[] = [];
 
-async function mountActions(errorMessage: string, onChangeConnectionTimeout = vi.fn()) {
+async function mountActions(errorMessage: string, options: { onChangeConnectionTimeout?: () => void; errorPosition?: { line: number; column: number }; onLocateError?: () => void } = {}) {
+  const onChangeConnectionTimeout = options.onChangeConnectionTimeout ?? vi.fn();
+  const onLocateError = options.onLocateError ?? vi.fn();
   const host = document.createElement("div");
   document.body.appendChild(host);
   const app = createApp({
-    setup: () => () => h(QueryErrorActions, { errorMessage, connectionId: "postgres-1", onChangeConnectionTimeout }),
+    setup: () => () =>
+      h(QueryErrorActions, {
+        errorMessage,
+        connectionId: "postgres-1",
+        errorPosition: options.errorPosition,
+        onChangeConnectionTimeout,
+        onLocateError,
+      }),
   });
   mountedApps.push(app);
   app.use(i18n);
   app.mount(host);
   await nextTick();
-  return { host, onChangeConnectionTimeout };
+  return { host, onChangeConnectionTimeout, onLocateError };
 }
 
 afterEach(() => {
@@ -35,6 +44,23 @@ describe("QueryErrorActions", () => {
     expect(onChangeConnectionTimeout).toHaveBeenCalledOnce();
   });
 
+  it("offers a locate-error action when the backend reports a position", async () => {
+    const { host, onLocateError } = await mountActions("ERROR: relation does not exist", {
+      errorPosition: { line: 2, column: 6 },
+    });
+    const locateButton = Array.from(host.querySelectorAll("button")).find((button) => button.textContent?.includes("Locate error"));
+
+    expect(locateButton?.textContent).toContain("line 2, col 6");
+    locateButton?.dispatchEvent(new MouseEvent("click", { bubbles: true }));
+    expect(onLocateError).toHaveBeenCalledOnce();
+  });
+
+  it("hides the locate-error action without a position", async () => {
+    const { host } = await mountActions("ERROR: relation does not exist");
+
+    expect(host.textContent).not.toContain("Locate error");
+  });
+
   it("does not offer connection timeout settings for query timeouts", async () => {
     const { host } = await mountActions("Query timed out after 30 seconds");
 
diff --git a/apps/desktop/src/components/editor/QueryEditor.vue b/apps/desktop/src/components/editor/QueryEditor.vue
index ab2db58bf2..05794a57da 100644
--- a/apps/desktop/src/components/editor/QueryEditor.vue
+++ b/apps/desktop/src/components/editor/QueryEditor.vue
@@ -1118,6 +1118,17 @@ function focusStatementRange(range: { from: number; to: number } | null) {
   currentView.focus();
 }
 
+function focusErrorPosition(offset: number) {
+  const currentView = view.value;
+  if (!currentView || !editorViewModule) return;
+  const errorPos = Math.max(0, Math.min(offset, currentView.state.doc.length));
+  currentView.dispatch({
+    selection: { anchor: errorPos },
+    effects: [editorViewModule.EditorView.scrollIntoView(errorPos, { y: "center" })],
+  });
+  currentView.focus();
+}
+
 function onPickerActiveIndexChange(index: number) {
   pickerActiveIndex.value = index;
   const candidate = pickerCandidates.value[index];
@@ -7553,6 +7564,7 @@ defineExpose({
   captureExecutionSnapshot,
   pasteClipboardAsSqlInCondition,
   focusStatementRange,
+  focusErrorPosition,
   previewStatementRange,
   refreshCompletionCache,
 });
diff --git a/apps/desktop/src/components/layout/ContentArea.vue b/apps/desktop/src/components/layout/ContentArea.vue
index e43f500cdb..f637722d00 100644
--- a/apps/desktop/src/components/layout/ContentArea.vue
+++ b/apps/desktop/src/components/layout/ContentArea.vue
@@ -45,6 +45,7 @@ import {
   RotateCcw,
   SkipForward,
   ListX,
+  LocateFixed,
 } from "@lucide/vue";
 import { Splitpanes, Pane } from "splitpanes";
 import { DynamicScroller, DynamicScrollerItem } from "vue-virtual-scroller";
@@ -134,6 +135,7 @@ import { TABLE_FONT_SIZE_MAX, TABLE_FONT_SIZE_MIN, useSettingsStore, type DataGr
 import { useToast } from "@/composables/useToast";
 import { isTauriRuntime } from "@/lib/backend/tauriRuntime";
 import { canCancelQueryExecution, isActiveResultLoading, queryExecutionLabelKey } from "@/lib/sql/queryExecutionState";
+import { sqlErrorEditorOffset, logSqlErrorPosition } from "@/lib/sql/errorPosition";
 import {
   databaseDisplayNameForTab,
   executionSummaryItems,
@@ -331,6 +333,9 @@ const activeDataTabTableMeta = computed(() => tableMetaForDataTab(props.activeTa
 const activeResultExecutionTarget = computed(() => queryStore.activeResultExecutionTarget(props.activeTab.id));
 const activeResultConnection = computed(() => (activeResultExecutionTarget.value ? connectionStore.getConfig(activeResultExecutionTarget.value.connectionId) : props.activeConnection));
 const activeResultConnectionId = computed(() => activeResultExecutionTarget.value?.connectionId ?? props.activeTab.connectionId);
+// Row/column locate only makes sense for SQL editor tabs: data/preview tabs have
+// no user statement to map the backend position onto.
+const activeResultErrorPosition = computed(() => (props.activeTab.mode === "query" ? props.activeTab.result?.error?.errorPosition : undefined));
 const activeResultDatabase = computed(() => activeResultExecutionTarget.value?.database ?? props.activeTab.database);
 const activeResultSchema = computed(() => activeResultExecutionTarget.value?.schema ?? props.activeTab.schema);
 const activeEffectiveDatabaseType = computed(() => effectiveDatabaseTypeForConnection(activeResultConnection.value));
@@ -1296,6 +1301,72 @@ function focusStatementRange(range: { from: number; to: number } | null): boolea
   return true;
 }
 
+function focusErrorPosition(offset: number): boolean {
+  if (!queryEditorRef.value) return false;
+  queryEditorRef.value.focusErrorPosition(offset);
+  return true;
+}
+
+/**
+ * Jump to the driver-reported row/column of the active result's error. Falls back
+ * to a cross-surface event when this surface only renders the shared result pane
+ * (the editor lives in another group).
+ */
+function locateActiveResultError() {
+  const result = props.activeTab.result;
+  logSqlErrorPosition("locate:invoke", {
+    tabId: props.activeTab.id,
+    mode: props.activeTab.mode,
+    hasEditorRef: Boolean(queryEditorRef.value),
+    activeResultIndex: props.activeTab.activeResultIndex,
+    statementIndex: result?.statement_index,
+    hasBackendError: Boolean(result?.error),
+    errorPosition: result?.error?.errorPosition ?? null,
+    editorLength: props.activeTab.sql.length,
+    resultIsError: Boolean(result && isQueryExecutionErrorResult(result)),
+  });
+  const mapped = sqlErrorEditorOffset({
+    editorSql: props.activeTab.sql,
+    result,
+    resultIndex: result?.statement_index ?? props.activeTab.activeResultIndex,
+    databaseType: activeEffectiveDatabaseType.value,
+    parameterOptions: activeSqlStatementParameterOptions.value,
+  });
+  if (!mapped) {
+    logSqlErrorPosition("locate:unavailable", {
+      tabId: props.activeTab.id,
+      reason: "sqlErrorEditorOffset returned undefined (see the preceding 'unresolved:result-source-range' log)",
+    });
+    toast(t("editor.errorPositionUnavailable"), 3000);
+    return;
+  }
+  logSqlErrorPosition("locate:focus", { tabId: props.activeTab.id, offset: mapped.offset, line: mapped.line, column: mapped.column });
+  if (queryEditorRef.value) {
+    queryEditorRef.value.focusErrorPosition(mapped.offset);
+  } else {
+    emit("focusErrorOffset", props.activeTab.id, mapped.offset);
+  }
+}
+
+function locateExecutionSummaryError(item: ExecutionSummaryItem) {
+  const mapped = item.result
+    ? sqlErrorEditorOffset({
+        editorSql: props.activeTab.sql,
+        result: item.result,
+        resultIndex: item.statementIndex,
+        databaseType: activeEffectiveDatabaseType.value,
+        parameterOptions: activeSqlStatementParameterOptions.value,
+      })
+    : undefined;
+  if (mapped) {
+    if (!focusErrorPosition(mapped.offset)) {
+      emit("focusErrorOffset", props.activeTab.id, mapped.offset);
+    }
+    return;
+  }
+  focusExecutionSummaryItem(item);
+}
+
 defineExpose({
   focusSearch,
   openGoToColumn,
@@ -1316,6 +1387,8 @@ defineExpose({
   executeRedisCommand,
   previewStatementRange,
   focusStatementRange,
+  focusErrorPosition,
+  locateActiveResultError,
 });
 </script>
 
@@ -1867,14 +1940,26 @@ defineExpose({
                         :title="item.error || item.sql"
                         :aria-label="item.error || item.sql || t('executionSummary.noSql')"
                         @click="previewExecutionSummaryItem(item)"
-                        @dblclick="focusExecutionSummaryItem(item)"
+                        @dblclick="locateExecutionSummaryError(item)"
                         @keydown.enter.prevent="focusExecutionSummaryItem(item)"
                       />
                       <div class="pointer-events-none relative z-[1] font-mono text-muted-foreground">#{{ item.statementIndex + 1 }}</div>
-                      <div class="relative z-[1] min-w-0 cursor-pointer" @click="previewExecutionSummaryItem(item)" @dblclick="focusExecutionSummaryItem(item)">
+                      <div class="relative z-[1] min-w-0 cursor-pointer" @click="previewExecutionSummaryItem(item)" @dblclick="locateExecutionSummaryError(item)">
                         <div class="truncate font-mono text-[11px] text-foreground">{{ item.sql || t("executionSummary.noSql") }}</div>
                         <div v-if="item.error" class="mt-0.5 flex min-w-0 items-center gap-1 text-[11px] text-destructive">
+                          <span v-if="item.errorPosition" class="shrink-0 rounded border border-destructive/30 bg-destructive/5 px-1 tabular-nums">{{ t("executionSummary.lineColumn", { line: item.errorPosition.line, column: item.errorPosition.column }) }}</span>
                           <span data-native-clipboard class="min-w-0 flex-1 cursor-text select-text truncate" :title="item.error" @mousedown.stop @click.stop @dblclick.stop>{{ item.error }}</span>
+                          <LightTooltip v-if="item.errorPosition" :text="t('editor.locateError', { line: item.errorPosition.line, column: item.errorPosition.column })" side="bottom" :delay="0" :close-delay="0" nowrap>
+                            <button
+                              type="button"
+                              class="pointer-events-auto flex h-5 w-5 shrink-0 items-center justify-center rounded text-destructive/70 hover:bg-destructive/10 hover:text-destructive"
+                              :aria-label="t('editor.locateError', { line: item.errorPosition.line, column: item.errorPosition.column })"
+                              @mousedown.stop
+                              @click.stop="locateExecutionSummaryError(item)"
+                            >
+                              <LocateFixed class="h-3 w-3" />
+                            </button>
+                          </LightTooltip>
                           <LightTooltip :text="t('grid.copy')" side="bottom" :delay="0" :close-delay="0" nowrap>
                             <button type="button" class="pointer-events-auto flex h-5 w-5 shrink-0 items-center justify-center rounded text-destructive/70 hover:bg-destructive/10 hover:text-destructive" :aria-label="t('grid.copy')" @mousedown.stop @click.stop="copyExecutionSummaryError(item.error)">
                               <Copy class="h-3 w-3" />
@@ -2034,6 +2119,8 @@ defineExpose({
                     :error-message="String(errorMessage)"
                     :backend-error="activeTab.result.error"
                     :connection-id="activeResultConnectionId"
+                    :error-position="activeResultErrorPosition"
+                    @locate-error="locateActiveResultError"
                     @change-connection-timeout="activeResultConnectionId && emit('openConnectionSettings', activeResultConnectionId, 'advanced')"
                     @change-query-timeout="activeResultConnectionId && emit('openConnectionSettings', activeResultConnectionId, 'advanced')"
                     @fix-with-ai="(message) => emit('fixWithAi', activeTab.id, message)"
@@ -2392,6 +2479,8 @@ defineExpose({
               :error-message="String(errorMessage)"
               :backend-error="activeTab.result.error"
               :connection-id="activeResultConnectionId"
+              :error-position="activeResultErrorPosition"
+              @locate-error="locateActiveResultError"
               @change-connection-timeout="activeResultConnectionId && emit('openConnectionSettings', activeResultConnectionId, 'advanced')"
               @change-query-timeout="activeResultConnectionId && emit('openConnectionSettings', activeResultConnectionId, 'advanced')"
               @fix-with-ai="(message) => emit('fixWithAi', activeTab.id, message)"
diff --git a/apps/desktop/src/components/layout/EditorGroup.vue b/apps/desktop/src/components/layout/EditorGroup.vue
index f708c36c6a..d8938fd641 100644
--- a/apps/desktop/src/components/layout/EditorGroup.vue
+++ b/apps/desktop/src/components/layout/EditorGroup.vue
@@ -89,6 +89,7 @@ defineExpose({
   executeRedisCommand: (command: string) => activeSurfaceRef.value?.executeRedisCommand(command) ?? Promise.resolve(false),
   previewStatementRange: (tabId: string, range: StatementRange | null) => (activeTab.value?.id === tabId ? (activeSurfaceRef.value?.previewStatementRange(range) ?? false) : false),
   focusStatementRange: (tabId: string, range: StatementRange | null) => (activeTab.value?.id === tabId ? (activeSurfaceRef.value?.focusStatementRange(range) ?? false) : false),
+  focusErrorPosition: (tabId: string, offset: number) => (activeTab.value?.id === tabId ? (activeSurfaceRef.value?.focusErrorPosition(offset) ?? false) : false),
 });
 
 const { t } = useI18n();
diff --git a/apps/desktop/src/components/layout/QueryEditorSurface.vue b/apps/desktop/src/components/layout/QueryEditorSurface.vue
index efb2284df9..16e14d9892 100644
--- a/apps/desktop/src/components/layout/QueryEditorSurface.vue
+++ b/apps/desktop/src/components/layout/QueryEditorSurface.vue
@@ -41,6 +41,7 @@ defineExpose<QueryEditorSurfaceHandle>({
   executeRedisCommand: (command: string) => contentAreaRef.value?.executeRedisCommand(command) ?? Promise.resolve(false),
   previewStatementRange: (range: StatementRange | null) => contentAreaRef.value?.previewStatementRange(range) ?? false,
   focusStatementRange: (range: StatementRange | null) => contentAreaRef.value?.focusStatementRange(range) ?? false,
+  focusErrorPosition: (offset: number) => contentAreaRef.value?.focusErrorPosition(offset) ?? false,
 });
 </script>
 
diff --git a/apps/desktop/src/components/layout/QueryResultSurface.vue b/apps/desktop/src/components/layout/QueryResultSurface.vue
index 012199661d..df24335c06 100644
--- a/apps/desktop/src/components/layout/QueryResultSurface.vue
+++ b/apps/desktop/src/components/layout/QueryResultSurface.vue
@@ -33,6 +33,7 @@ defineExpose<QueryResultSurfaceHandle>({
   handleModRTarget: (target: Element) => contentAreaRef.value?.handleModRTarget(target) ?? false,
   previewStatementRange: (range: StatementRange | null) => contentAreaRef.value?.previewStatementRange(range) ?? false,
   focusStatementRange: (range: StatementRange | null) => contentAreaRef.value?.focusStatementRange(range) ?? false,
+  focusErrorPosition: (offset: number) => contentAreaRef.value?.focusErrorPosition(offset) ?? false,
 });
 </script>
 
diff --git a/apps/desktop/src/components/layout/SqlEditorWorkspace.vue b/apps/desktop/src/components/layout/SqlEditorWorkspace.vue
index 542cf30aa8..defa486d6b 100644
--- a/apps/desktop/src/components/layout/SqlEditorWorkspace.vue
+++ b/apps/desktop/src/components/layout/SqlEditorWorkspace.vue
@@ -255,6 +255,14 @@ function handleFocusStatement(tabId: string, range: StatementRange | null): bool
   }
   return false;
 }
+function handleFocusErrorOffset(tabId: string, offset: number): boolean {
+  for (const group of groupRefs.values()) {
+    if (group.focusErrorPosition(tabId, offset)) {
+      return true;
+    }
+  }
+  return false;
+}
 </script>
 
 <template>
@@ -348,6 +356,11 @@ function handleFocusStatement(tabId: string, range: StatementRange | null): bool
                   handleFocusStatement(tabId, range);
                 }
               "
+              @focus-error-offset="
+                (tabId: string, offset: number) => {
+                  handleFocusErrorOffset(tabId, offset);
+                }
+              "
             />
           </div>
         </Pane>
diff --git a/apps/desktop/src/components/layout/querySurfaces.ts b/apps/desktop/src/components/layout/querySurfaces.ts
index 4b162ac903..cfc16e7f60 100644
--- a/apps/desktop/src/components/layout/querySurfaces.ts
+++ b/apps/desktop/src/components/layout/querySurfaces.ts
@@ -29,6 +29,7 @@ export interface QueryEditorSurfaceHandle {
   executeRedisCommand(command: string): Promise<boolean>;
   previewStatementRange(range: StatementRange | null): boolean;
   focusStatementRange(range: StatementRange | null): boolean;
+  focusErrorPosition(offset: number): boolean;
 }
 
 export interface QueryResultSurfaceHandle {
@@ -38,6 +39,7 @@ export interface QueryResultSurfaceHandle {
   handleModRTarget(target: Element): boolean;
   previewStatementRange(range: StatementRange | null): boolean;
   focusStatementRange(range: StatementRange | null): boolean;
+  focusErrorPosition(offset: number): boolean;
 }
 
 export interface ContentAreaSurfaceProps {
@@ -97,6 +99,7 @@ export interface ContentAreaSurfaceEmits {
   structureEditorClose: [tabId: string];
   previewStatement: [tabId: string, range: StatementRange | null];
   focusStatement: [tabId: string, range: StatementRange | null];
+  focusErrorOffset: [tabId: string, offset: number];
   openSettings: [initialTab?: string, initialSection?: string];
   openConnectionSettings: [connectionId: string, initialTab: "advanced"];
   toggleZenMode: [];
diff --git a/apps/desktop/src/i18n/__tests__/backendErrors.spec.ts b/apps/desktop/src/i18n/__tests__/backendErrors.spec.ts
index 141625ce32..66a87a8fad 100644
--- a/apps/desktop/src/i18n/__tests__/backendErrors.spec.ts
+++ b/apps/desktop/src/i18n/__tests__/backendErrors.spec.ts
@@ -230,6 +230,20 @@ describe("backend error translation", () => {
     expect(sanitizeBackendErrorMessage(message)).toBe(message);
   });
 
+  test("strips the SQL error-position transport suffix from raw messages", () => {
+    const message = 'ERROR: relation "missing" does not exist\nDBX_SQL_ERROR_POSITION:15';
+    const expected = 'ERROR: relation "missing" does not exist';
+
+    expect(sanitizeBackendErrorMessage(message)).toBe(expected);
+    expect(formatError(new Error(message))).toBe(expected);
+  });
+
+  test("strips the position suffix that precedes appended context text", () => {
+    const message = "ERROR: boom\nDBX_SQL_ERROR_POSITION:7; cleanup failed";
+
+    expect(sanitizeBackendErrorMessage(message)).toBe("ERROR: boom; cleanup failed");
+  });
+
   test("normalizes Error and structural message objects before translation", () => {
     const t = translatorFor("zh-CN");
     const message = "file does not exist: /tmp/missing.sqlite";
@@ -327,6 +341,44 @@ describe("backend error translation", () => {
     ).toBeNull();
   });
 
+  test("accepts an optional driver-reported error position", () => {
+    const error = normalizeBackendError({
+      version: 1,
+      code: "DBX-JDBC-4001",
+      messageKey: "backendErrors.jdbc.sqlFailed",
+      messageParams: { stage: "execute" },
+      source: "jdbcAgent",
+      operationOutcome: "unknown",
+      detail: 'ERROR: relation "missing" does not exist',
+      errorPosition: { line: 2, column: 6, offset: 12 },
+    });
+
+    expect(error?.errorPosition).toEqual({ line: 2, column: 6, offset: 12 });
+
+    const t = translatorFor("zh-CN");
+    expect(translateBackendError(t, error)).toBe(`${t("backendErrors.jdbc.sqlFailed", { stage: "execute" })}\n\nERROR: relation "missing" does not exist`);
+  });
+
+  test.each([
+    ["zero line", { line: 0, column: 1, offset: 0 }],
+    ["negative column", { line: 1, column: -1, offset: 0 }],
+    ["non-integer offset", { line: 1, column: 1, offset: 1.5 }],
+    ["string line", { line: "1", column: 1, offset: 0 }],
+    ["array position", [1, 1, 0]],
+  ])("rejects a malformed error position with %s", (_name, errorPosition) => {
+    expect(
+      normalizeBackendError({
+        version: 1,
+        code: "DBX-JDBC-4001",
+        messageKey: "backendErrors.jdbc.sqlFailed",
+        messageParams: { stage: "execute" },
+        source: "jdbcAgent",
+        operationOutcome: "unknown",
+        errorPosition,
+      }),
+    ).toBeNull();
+  });
+
   test("accepts unknown compatibility sources and extensible origins", () => {
     const error = normalizeBackendError({
       version: 1,
diff --git a/apps/desktop/src/i18n/locales/az.ts b/apps/desktop/src/i18n/locales/az.ts
index 52a1a86e89..e043852433 100644
--- a/apps/desktop/src/i18n/locales/az.ts
+++ b/apps/desktop/src/i18n/locales/az.ts
@@ -1311,6 +1311,8 @@ export default withEnglishFallback({
     queryTimeoutError: "Sorğunun vaxt limiti bitdi ({seconds}s). Verilənlər bazası əlaqəsinin işlək olub-olmadığını yoxlayın.",
     changeConnectionTimeout: "Əlaqənin vaxt limitini dəyiş",
     changeQueryTimeout: "Sorğunun vaxt limitini dəyiş",
+    locateError: "Xətanı tap ({line}. sətir, {column}. sütun)",
+    errorPositionUnavailable: "Xəta mövqeyi redaktorun cari məzmununa uyğun gəlmir, ona görə də tapıla bilmir.",
     connectionMayBeLost: "Əlaqə kəsilmiş ola bilər. Məlumatları yeniləyin və yenidən cəhd edin.",
     showResultsPane: "Nəticələri göstər",
     hideResultsPane: "Nəticələri gizlət",
@@ -1655,6 +1657,7 @@ export default withEnglishFallback({
     returnedTable: "{count} sütunlu nəticə cədvəli qaytarıldı",
     noTable: "Nəticə cədvəli qaytarılmadı",
     noSql: "SQL mövcud deyil",
+    lineColumn: "{line}. sətir, {column}. sütun",
     navigationHint: "SQL-ə önbaxış üçün sətrə klikləyin; redaktorda ona keçmək üçün iki dəfə klikləyin.",
     recoveryPrompt: "#{statement} əmri uğursuz oldu; {count} əmr işlədilmədi.",
     stop: "Dayandır",
diff --git a/apps/desktop/src/i18n/locales/en.ts b/apps/desktop/src/i18n/locales/en.ts
index 1c6f0c1000..ec7ee4db08 100644
--- a/apps/desktop/src/i18n/locales/en.ts
+++ b/apps/desktop/src/i18n/locales/en.ts
@@ -1442,6 +1442,8 @@ export default {
     queryTimeoutError: "Query timed out ({seconds}s). Check whether the database connection is healthy.",
     changeConnectionTimeout: "Change connection timeout",
     changeQueryTimeout: "Change query timeout",
+    locateError: "Locate error (line {line}, col {column})",
+    errorPositionUnavailable: "The error position no longer matches the editor content, so it cannot be located.",
     connectionMayBeLost: "The connection may have been lost. Refresh data and try again.",
     showResultsPane: "Show results",
     hideResultsPane: "Hide results",
@@ -1786,6 +1788,7 @@ export default {
     returnedTable: "Returned a {count}-column result table",
     noTable: "No result table returned",
     noSql: "SQL unavailable",
+    lineColumn: "line {line}, col {column}",
     navigationHint: "Click a row to preview its SQL; double-click to focus it in the editor.",
     recoveryPrompt: "Statement #{statement} failed; {count} statements were not run.",
     stop: "Stop",
diff --git a/apps/desktop/src/i18n/locales/es.ts b/apps/desktop/src/i18n/locales/es.ts
index 5d1c0e1d96..42e3440103 100644
--- a/apps/desktop/src/i18n/locales/es.ts
+++ b/apps/desktop/src/i18n/locales/es.ts
@@ -1412,6 +1412,8 @@ export default withEnglishFallback({
     queryTimeoutError: "La consulta agotó el tiempo ({seconds}s). Comprueba la conexión a la base de datos.",
     changeConnectionTimeout: "Cambiar tiempo de espera de conexión",
     changeQueryTimeout: "Cambiar tiempo de espera de consulta",
+    locateError: "Localizar error (línea {line}, columna {column})",
+    errorPositionUnavailable: "La posición del error ya no coincide con el contenido del editor, por lo que no se puede localizar.",
     connectionMayBeLost: "Es posible que la conexión se haya perdido. Actualiza los datos e inténtalo de nuevo.",
     showResultsPane: "Mostrar resultados",
     hideResultsPane: "Ocultar resultados",
@@ -1709,6 +1711,7 @@ export default withEnglishFallback({
     returnedTable: "Devolvió una tabla de resultados de {count} columnas",
     noTable: "No se devolvió ninguna tabla de resultados",
     noSql: "SQL no disponible",
+    lineColumn: "línea {line}, columna {column}",
     navigationHint: "Haz clic para previsualizar el SQL; haz doble clic para enfocarlo en el editor.",
     recoveryPrompt: "Falló la sentencia #{statement}; no se ejecutaron {count} sentencias.",
     stop: "Detener",
diff --git a/apps/desktop/src/i18n/locales/it.ts b/apps/desktop/src/i18n/locales/it.ts
index 02d0eb8fc0..c9ee7584f6 100644
--- a/apps/desktop/src/i18n/locales/it.ts
+++ b/apps/desktop/src/i18n/locales/it.ts
@@ -1410,6 +1410,8 @@ export default withEnglishFallback({
     queryTimeoutError: "Timeout della query ({seconds}s). Verifica se la connessione al database è integra.",
     changeConnectionTimeout: "Modifica timeout connessione",
     changeQueryTimeout: "Modifica timeout query",
+    locateError: "Individua errore (riga {line}, colonna {column})",
+    errorPositionUnavailable: "La posizione dell'errore non corrisponde più al contenuto dell'editor, quindi non è possibile individuarla.",
     connectionMayBeLost: "La connessione potrebbe essere andata perduta. Aggiorna i dati e riprova.",
     showResultsPane: "Mostra risultati",
     hideResultsPane: "Nascondi risultati",
@@ -1707,6 +1709,7 @@ export default withEnglishFallback({
     returnedTable: "Restituita una tabella con {count} colonne",
     noTable: "Nessuna tabella restituita",
     noSql: "SQL non disponibile",
+    lineColumn: "riga {line}, colonna {column}",
     navigationHint: "Fai clic per visualizzare l'SQL; fai doppio clic per selezionarlo nell'editor.",
     recoveryPrompt: "L'istruzione #{statement} non è riuscita; {count} istruzioni non sono state eseguite.",
     stop: "Interrompi",
diff --git a/apps/desktop/src/i18n/locales/ja.ts b/apps/desktop/src/i18n/locales/ja.ts
index 1ade9e0536..0ca2dc4db0 100644
--- a/apps/desktop/src/i18n/locales/ja.ts
+++ b/apps/desktop/src/i18n/locales/ja.ts
@@ -1431,6 +1431,8 @@ export default withEnglishFallback({
     queryTimeoutError: "クエリがタイムアウトしました（{seconds}秒）。データベース接続が正常か確認してください。",
     changeConnectionTimeout: "接続タイムアウトを変更",
     changeQueryTimeout: "クエリタイムアウトを変更",
+    locateError: "エラー位置へ移動（{line} 行目 {column} 桁目）",
+    errorPositionUnavailable: "エラー位置が現在のエディター内容と一致しないため、位置を特定できません。",
     connectionMayBeLost: "接続が失われた可能性があります。データを更新して再試行してください。",
     showResultsPane: "結果を表示",
     hideResultsPane: "結果を非表示",
@@ -1729,6 +1731,7 @@ export default withEnglishFallback({
     returnedTable: "{count}列の結果テーブルを返しました",
     noTable: "結果テーブルは返されませんでした",
     noSql: "SQLを取得できません",
+    lineColumn: "{line} 行目 {column} 桁目",
     navigationHint: "クリックでSQLをプレビューし、ダブルクリックでエディター内を選択します。",
     recoveryPrompt: "ステートメント #{statement} が失敗し、残り {count} 件は未実行です。",
     stop: "停止",
diff --git a/apps/desktop/src/i18n/locales/ko.ts b/apps/desktop/src/i18n/locales/ko.ts
index 243646eb7f..6ea97f7620 100644
--- a/apps/desktop/src/i18n/locales/ko.ts
+++ b/apps/desktop/src/i18n/locales/ko.ts
@@ -1332,6 +1332,8 @@ export default withEnglishFallback({
     queryTimeoutError: "쿼리 시간 초과 ({seconds}초). 데이터베이스 연결이 정상인지 확인하세요.",
     changeConnectionTimeout: "연결 제한 시간 변경",
     changeQueryTimeout: "쿼리 제한 시간 변경",
+    locateError: "오류 위치로 이동 ({line}행 {column}열)",
+    errorPositionUnavailable: "오류 위치가 현재 편집기 내용과 일치하지 않아 위치를 찾을 수 없습니다.",
     connectionMayBeLost: "연결이 끊어졌을 수 있습니다. 데이터를 새로고침하고 다시 시도하세요.",
     showResultsPane: "결과 표시",
     hideResultsPane: "결과 숨기기",
@@ -1658,6 +1660,7 @@ export default withEnglishFallback({
     returnedTable: "{count}열 결과 테이블을 반환했습니다",
     noTable: "반환된 결과 테이블이 없습니다",
     noSql: "SQL을 가져올 수 없습니다",
+    lineColumn: "{line}행 {column}열",
     navigationHint: "행을 클릭하여 SQL을 미리 보고 두 번 클릭하여 편집기에서 선택하세요.",
     recoveryPrompt: "구문 #{statement} 실행에 실패하여 나머지 {count}개 구문이 실행되지 않았습니다.",
     stop: "중지",
diff --git a/apps/desktop/src/i18n/locales/pt-BR.ts b/apps/desktop/src/i18n/locales/pt-BR.ts
index 56dfbb15ef..26518cee57 100644
--- a/apps/desktop/src/i18n/locales/pt-BR.ts
+++ b/apps/desktop/src/i18n/locales/pt-BR.ts
@@ -1411,6 +1411,8 @@ export default withEnglishFallback({
     queryTimeoutError: "A consulta expirou ({seconds}s). Verifique se a conexão com o banco de dados está saudável.",
     changeConnectionTimeout: "Alterar tempo limite da conexão",
     changeQueryTimeout: "Alterar tempo limite da consulta",
+    locateError: "Localizar erro (linha {line}, coluna {column})",
+    errorPositionUnavailable: "A posição do erro não corresponde mais ao conteúdo do editor, portanto não é possível localizá-la.",
     connectionMayBeLost: "A conexão pode ter sido perdida. Atualize os dados e tente novamente.",
     showResultsPane: "Mostrar resultados",
     hideResultsPane: "Ocultar resultados",
@@ -1709,6 +1711,7 @@ export default withEnglishFallback({
     returnedTable: "Retornou uma tabela de resultado com {count} colunas",
     noTable: "Nenhuma tabela de resultado retornada",
     noSql: "SQL indisponível",
+    lineColumn: "linha {line}, coluna {column}",
     navigationHint: "Clique para visualizar o SQL; clique duas vezes para selecioná-lo no editor.",
     recoveryPrompt: "A instrução #{statement} falhou; {count} instruções não foram executadas.",
     stop: "Parar",
diff --git a/apps/desktop/src/i18n/locales/tr.ts b/apps/desktop/src/i18n/locales/tr.ts
index 175b8a395c..8ba7562ab8 100644
--- a/apps/desktop/src/i18n/locales/tr.ts
+++ b/apps/desktop/src/i18n/locales/tr.ts
@@ -1313,6 +1313,8 @@ export default withEnglishFallback({
     queryTimeoutError: "Sorgu zaman aşımına uğradı ({seconds} sn). Veritabanı bağlantısının sağlıklı olup olmadığını denetleyin.",
     changeConnectionTimeout: "Bağlantı zaman aşımını değiştir",
     changeQueryTimeout: "Sorgu zaman aşımını değiştir",
+    locateError: "Hatayı bul ({line}. satır, {column}. sütun)",
+    errorPositionUnavailable: "Hata konumu düzenleyicinin geçerli içeriğiyle eşleşmediği için bulunamıyor.",
     connectionMayBeLost: "Bağlantı kopmuş olabilir. Verileri yenileyip tekrar deneyin.",
     showResultsPane: "Sonuçları göster",
     hideResultsPane: "Sonuçları gizle",
@@ -1656,6 +1658,7 @@ export default withEnglishFallback({
     returnedTable: "{count} sütunlu bir sonuç tablosu döndürdü",
     noTable: "Sonuç tablosu döndürülmedi",
     noSql: "SQL kullanılamıyor",
+    lineColumn: "{line}. satır, {column}. sütun",
     navigationHint: "SQL'ini önizlemek için bir satıra tıklayın; düzenleyicide odaklamak için çift tıklayın.",
     recoveryPrompt: "#{statement} numaralı ifade başarısız oldu; {count} ifade çalıştırılmadı.",
     stop: "Durdur",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.ts b/apps/desktop/src/i18n/locales/zh-CN.ts
index a136091178..cb3fde243a 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.ts
+++ b/apps/desktop/src/i18n/locales/zh-CN.ts
@@ -1357,6 +1357,8 @@ export default withEnglishFallback({
     queryTimeoutError: "查询超时 ({seconds}s)，请检查数据库连接是否正常",
     changeConnectionTimeout: "修改超时时间",
     changeQueryTimeout: "修改查询超时时间",
+    locateError: "定位错误（第 {line} 行，第 {column} 列）",
+    errorPositionUnavailable: "错误位置与当前编辑器内容不一致，无法定位。",
     connectionMayBeLost: "连接可能已断开，请刷新数据重试",
     showResultsPane: "显示结果",
     hideResultsPane: "收起",
@@ -1701,6 +1703,7 @@ export default withEnglishFallback({
     returnedTable: "返回 {count} 列结果表",
     noTable: "未返回结果表",
     noSql: "无法获取 SQL",
+    lineColumn: "第 {line} 行，第 {column} 列",
     navigationHint: "单击预览对应 SQL，双击在编辑器中聚焦并选中。",
     recoveryPrompt: "语句 #{statement} 执行失败，剩余 {count} 条未执行。",
     stop: "停止",
diff --git a/apps/desktop/src/i18n/locales/zh-TW.ts b/apps/desktop/src/i18n/locales/zh-TW.ts
index 279bc53b68..583f3b6a43 100644
--- a/apps/desktop/src/i18n/locales/zh-TW.ts
+++ b/apps/desktop/src/i18n/locales/zh-TW.ts
@@ -1410,6 +1410,8 @@ export default withEnglishFallback({
     queryTimeoutError: "查詢逾時 ({seconds}s)，請檢查資料庫連線是否正常",
     changeConnectionTimeout: "修改連線逾時時間",
     changeQueryTimeout: "修改查詢逾時時間",
+    locateError: "定位錯誤（第 {line} 行，第 {column} 列）",
+    errorPositionUnavailable: "錯誤位置與目前編輯器內容不一致，無法定位。",
     connectionMayBeLost: "連線可能已斷開，請重新整理資料重試",
     showResultsPane: "顯示結果",
     hideResultsPane: "收起結果",
@@ -1708,6 +1710,7 @@ export default withEnglishFallback({
     returnedTable: "回傳 {count} 欄的結果表",
     noTable: "未回傳結果表",
     noSql: "無法取得 SQL",
+    lineColumn: "第 {line} 行，第 {column} 列",
     navigationHint: "按一下預覽 SQL，按兩下在編輯器中聚焦並選取。",
     recoveryPrompt: "語句 #{statement} 執行失敗，剩餘 {count} 條未執行。",
     stop: "停止",
diff --git a/apps/desktop/src/lib/__tests__/sql/errorPosition.spec.ts b/apps/desktop/src/lib/__tests__/sql/errorPosition.spec.ts
new file mode 100644
index 0000000000..552076a2b4
--- /dev/null
+++ b/apps/desktop/src/lib/__tests__/sql/errorPosition.spec.ts
@@ -0,0 +1,188 @@
+import { describe, expect, it } from "vitest";
+
+import type { BackendError, SqlErrorPosition } from "@/lib/backend/errorUtils";
+import { mapExecutedOffsetToSource, scalarPositionToUtf16Offset, sqlErrorEditorOffset } from "@/lib/sql/errorPosition";
+import type { QueryResult } from "@/types/database";
+
+function backendError(position?: SqlErrorPosition): BackendError {
+  return {
+    version: 1,
+    code: "DBX-JDBC-4001",
+    messageKey: "backendErrors.jdbc.sqlFailed",
+    messageParams: { stage: "execute" },
+    source: "jdbcAgent",
+    operationOutcome: "unknown",
+    detail: "ERROR: relation does not exist",
+    ...(position ? { errorPosition: position } : {}),
+  };
+}
+
+function errorResult(options: { editorStatement?: string; sourceFrom?: number; sourceTo?: number; executedStatement?: string; position?: SqlErrorPosition }): QueryResult {
+  const statement = options.editorStatement ?? "";
+  return {
+    columns: ["Error"],
+    rows: [["ERROR: relation does not exist"]],
+    affected_rows: 0,
+    execution_time_ms: 0,
+    execution_error: true,
+    error: backendError(options.position),
+    sourceStatement: statement,
+    sourceFrom: options.sourceFrom ?? 0,
+    sourceTo: options.sourceTo ?? statement.length,
+    ...(options.executedStatement ? { executedStatement: options.executedStatement } : {}),
+  };
+}
+
+describe("sqlErrorEditorOffset", () => {
+  it("maps a first-line column to an absolute editor offset", () => {
+    const sql = "SELECT * FROM no_such_table";
+    const result = errorResult({
+      editorStatement: sql,
+      position: { line: 1, column: 15, offset: 14 },
+    });
+
+    expect(sqlErrorEditorOffset({ editorSql: sql, result })).toEqual({ offset: 14, line: 1, column: 15 });
+  });
+
+  it("maps a later-line column", () => {
+    const statement = "SELECT *\nFROM missing";
+    const result = errorResult({
+      editorStatement: statement,
+      position: { line: 2, column: 6, offset: 14 },
+    });
+
+    expect(sqlErrorEditorOffset({ editorSql: statement, result })).toEqual({ offset: 14, line: 2, column: 6 });
+  });
+
+  it("adds the statement's absolute start offset in a multi-statement editor", () => {
+    const statement = "SELECT *\nFROM missing";
+    const editorSql = "SELECT 1;\n" + statement;
+    const start = editorSql.indexOf(statement);
+    const result = errorResult({
+      editorStatement: statement,
+      sourceFrom: start,
+      sourceTo: start + statement.length,
+      position: { line: 2, column: 6, offset: 14 },
+    });
+
+    expect(sqlErrorEditorOffset({ editorSql, result })).toEqual({ offset: start + 14, line: 2, column: 6 });
+  });
+
+  it("converts scalar-value columns to UTF-16 offsets for astral characters", () => {
+    const statement = "SELECT '😀' FROM t";
+    // Code-point column of FROM: S E L E C T space ' 😀 ' space = 11 chars, so FROM is column 12.
+    const result = errorResult({
+      editorStatement: statement,
+      position: { line: 1, column: 12, offset: 11 },
+    });
+
+    // UTF-16 offset: the emoji occupies two code units, so 'FROM' starts at 12.
+    expect(sqlErrorEditorOffset({ editorSql: statement, result })).toEqual({ offset: 12, line: 1, column: 12 });
+  });
+
+  it("returns undefined when the result carries no position", () => {
+    const sql = "SELECT 1";
+    const result = errorResult({ editorStatement: sql });
+
+    expect(sqlErrorEditorOffset({ editorSql: sql, result })).toBeUndefined();
+  });
+
+  it("returns undefined when the statement no longer matches the editor", () => {
+    const result = errorResult({
+      editorStatement: "SELECT * FROM gone",
+      position: { line: 1, column: 15, offset: 14 },
+    });
+
+    expect(sqlErrorEditorOffset({ editorSql: "SELECT 1", result })).toBeUndefined();
+  });
+
+  it("clamps instead of failing when the position line is beyond the statement", () => {
+    const sql = "SELECT 1";
+    const result = errorResult({
+      editorStatement: sql,
+      position: { line: 5, column: 1, offset: 4 },
+    });
+
+    // The position is relative to the statement, so a bad line clamps to its end.
+    expect(sqlErrorEditorOffset({ editorSql: sql, result })?.offset).toBe(sql.length);
+  });
+
+  describe("when the executed statement differs from the source", () => {
+    it("projects an appended LIMIT/OFFSET position back onto the source", () => {
+      const source = "SELECT * FROM t";
+      const executed = "SELECT * FROM t LIMIT 100 OFFSET 0;";
+      const tableOffset = executed.indexOf("FROM t") + "FROM ".length;
+      const result = errorResult({
+        editorStatement: source,
+        executedStatement: executed,
+        position: { line: 1, column: tableOffset + 1, offset: tableOffset },
+      });
+
+      expect(sqlErrorEditorOffset({ editorSql: source, result })?.offset).toBe(source.indexOf("FROM t") + "FROM ".length);
+    });
+
+    it("projects a pagination wrapper position back onto the inner statement", () => {
+      const source = "SELECT * FROM t";
+      const executed = "SELECT * FROM (SELECT * FROM t) AS dbx_page LIMIT 100 OFFSET 0;";
+      const tableOffset = executed.indexOf("FROM t") + "FROM ".length;
+      const result = errorResult({
+        editorStatement: source,
+        executedStatement: executed,
+        position: { line: 1, column: tableOffset + 1, offset: tableOffset },
+      });
+
+      expect(sqlErrorEditorOffset({ editorSql: source, result })?.offset).toBe(source.indexOf("FROM t") + "FROM ".length);
+    });
+
+    it("projects an injected hidden-key column position back onto the source", () => {
+      const source = "SELECT * FROM users";
+      const executed = 'SELECT *, "id" AS "__dbx_hidden_pk" FROM users LIMIT 100 OFFSET 0;';
+      const tableOffset = executed.indexOf("FROM users") + "FROM ".length;
+      const result = errorResult({
+        editorStatement: source,
+        executedStatement: executed,
+        position: { line: 1, column: tableOffset + 1, offset: tableOffset },
+      });
+
+      expect(sqlErrorEditorOffset({ editorSql: source, result })?.offset).toBe(source.indexOf("users"));
+    });
+
+    it("keeps a multi-line position aligned when the wrapper is on the first line only", () => {
+      const source = "SELECT *\nFROM users\nWHERE id = 1";
+      const executed = `SELECT * FROM (${source}) AS dbx_page LIMIT 100 OFFSET 0;`;
+      const executedMissing = executed.indexOf("users");
+      const result = errorResult({
+        editorStatement: source,
+        executedStatement: executed,
+        // `users` is on line 2 of both texts.
+        position: { line: 2, column: 6, offset: executedMissing + 5 },
+      });
+
+      expect(sqlErrorEditorOffset({ editorSql: source, result })?.offset).toBe(source.indexOf("users"));
+    });
+  });
+});
+
+describe("scalarPositionToUtf16Offset", () => {
+  it("converts scalar line/column to a UTF-16 offset", () => {
+    expect(scalarPositionToUtf16Offset("SELECT '😀' FROM t", 1, 12)).toBe(12);
+  });
+
+  it("clamps a column past the end of its line", () => {
+    expect(scalarPositionToUtf16Offset("SELECT 1\nFROM t", 1, 999)).toBe("SELECT 1".length);
+  });
+});
+
+describe("mapExecutedOffsetToSource", () => {
+  it("returns the offset unchanged when both texts are identical", () => {
+    expect(mapExecutedOffsetToSource("SELECT 1", "SELECT 1", 4)).toBe(4);
+  });
+
+  it("maps an append-only rewrite through the shared prefix", () => {
+    expect(mapExecutedOffsetToSource("SELECT 1 LIMIT 10", "SELECT 1", 4)).toBe(4);
+  });
+
+  it("clamps offsets in the appended region to the source end", () => {
+    expect(mapExecutedOffsetToSource("SELECT 1 LIMIT 10", "SELECT 1", 15)).toBe("SELECT 1".length);
+  });
+});
diff --git a/apps/desktop/src/lib/backend/errorUtils.ts b/apps/desktop/src/lib/backend/errorUtils.ts
index 6dbf63e845..5de31d1ee7 100644
--- a/apps/desktop/src/lib/backend/errorUtils.ts
+++ b/apps/desktop/src/lib/backend/errorUtils.ts
@@ -4,6 +4,19 @@
 
 export type BackendErrorParam = string | number | boolean;
 
+/**
+ * Driver-reported SQL error position, relative to the statement text that was
+ * actually sent to the database. `line`/`column` are 1-based and counted in
+ * Unicode scalar values; `offset` is the 0-based scalar-value index.
+ *
+ * Currently only populated by the native PostgreSQL driver.
+ */
+export interface SqlErrorPosition {
+  line: number;
+  column: number;
+  offset: number;
+}
+
 export interface BackendError {
   version: 1;
   code: string;
@@ -20,6 +33,7 @@ export interface BackendError {
   detail?: string;
   diagnostics?: Record<string, unknown>;
   helpUrl?: string;
+  errorPosition?: SqlErrorPosition;
 }
 
 export const MANUAL_TRANSACTION_SESSION_EXPIRED_CODE = "DBX-TXN-1001";
@@ -27,20 +41,25 @@ export const MANUAL_TRANSACTION_SESSION_EXPIRED_CODE = "DBX-TXN-1001";
 const MAX_FALLBACK_CHARS = 64 * 1024;
 const MAX_ERROR_PARSE_DEPTH = 16;
 const AGENT_RPC_ERROR_DATA_MARKER = "\nDBX_AGENT_ERROR_DATA:";
+// Rust-side transport suffix carrying a driver cursor position. It is stripped
+// before a structured envelope is built, but metadata/catalog errors can surface
+// as raw strings, so strip it here so it never reaches the UI.
+const SQL_ERROR_POSITION_MARKER_PATTERN = /\nDBX_SQL_ERROR_POSITION:\d+/g;
 
 export function sanitizeBackendErrorMessage(message: string): string {
-  const markerIndex = message.lastIndexOf(AGENT_RPC_ERROR_DATA_MARKER);
-  if (markerIndex < 0) return message;
+  const withoutPositionMarker = message.replace(SQL_ERROR_POSITION_MARKER_PATTERN, "");
+  const markerIndex = withoutPositionMarker.lastIndexOf(AGENT_RPC_ERROR_DATA_MARKER);
+  if (markerIndex < 0) return withoutPositionMarker;
 
-  const rawData = message.slice(markerIndex + AGENT_RPC_ERROR_DATA_MARKER.length).trim();
+  const rawData = withoutPositionMarker.slice(markerIndex + AGENT_RPC_ERROR_DATA_MARKER.length).trim();
   try {
     const data: unknown = JSON.parse(rawData);
-    if (!data || typeof data !== "object" || Array.isArray(data)) return message;
+    if (!data || typeof data !== "object" || Array.isArray(data)) return withoutPositionMarker;
   } catch {
-    return message;
+    return withoutPositionMarker;
   }
 
-  return message.slice(0, markerIndex).trimEnd();
+  return withoutPositionMarker.slice(0, markerIndex).trimEnd();
 }
 
 function isBackendError(value: unknown): value is BackendError {
@@ -79,9 +98,29 @@ function isBackendError(value: unknown): value is BackendError {
     }
   }
   if (candidate.detail !== undefined && typeof candidate.detail !== "string") return false;
+  // Optional driver-reported position. Malformed values are rejected so a
+  // corrupted envelope never drives a wrong editor jump, while a missing field
+  // stays valid (all non-PostgreSQL errors and older backends).
+  if (candidate.errorPosition !== undefined) {
+    if (!isValidErrorPosition(candidate.errorPosition)) return false;
+  }
   return Object.values(candidate.messageParams).every((param) => typeof param === "string" || typeof param === "boolean" || (typeof param === "number" && Number.isFinite(param)));
 }
 
+function isValidErrorPosition(value: unknown): value is SqlErrorPosition {
+  if (!value || typeof value !== "object" || Array.isArray(value)) return false;
+  const { line, column, offset } = value as Record<string, unknown>;
+  return isPositiveInt(line) && isPositiveInt(column) && isNonNegativeInt(offset);
+}
+
+function isPositiveInt(value: unknown): boolean {
+  return typeof value === "number" && Number.isInteger(value) && value >= 1;
+}
+
+function isNonNegativeInt(value: unknown): boolean {
+  return typeof value === "number" && Number.isInteger(value) && value >= 0;
+}
+
 export function normalizeBackendError(error: unknown): BackendError | null {
   return normalizeBackendErrorAtDepth(error, new WeakSet<object>(), 0);
 }
diff --git a/apps/desktop/src/lib/sql/errorPosition.ts b/apps/desktop/src/lib/sql/errorPosition.ts
new file mode 100644
index 0000000000..aaffb90580
--- /dev/null
+++ b/apps/desktop/src/lib/sql/errorPosition.ts
@@ -0,0 +1,245 @@
+import type { DatabaseType, QueryResult } from "@/types/database";
+import type { SqlParameterOptions } from "@/lib/sql/sqlParameters";
+import { splitSqlStatementRanges } from "@/lib/sql/sqlStatementRanges";
+import { resultSourceRange } from "@/lib/tabs/tabPresentation";
+
+export interface EditorErrorPosition {
+  /** Absolute UTF-16 offset into the current editor document. */
+  offset: number;
+  /** 1-based line within the statement, for display. */
+  line: number;
+  /** 1-based column within the statement, for display. */
+  column: number;
+}
+
+export interface SqlErrorOffsetOptions {
+  editorSql: string;
+  result: QueryResult | undefined | null;
+  resultIndex?: number;
+  databaseType?: DatabaseType;
+  parameterOptions?: SqlParameterOptions;
+}
+
+/**
+ * Diagnostics for the "locate SQL error" flow.
+ *
+ * Failures are always logged (they explain the "position unavailable" toast).
+ * Successful resolutions are verbose-only: run
+ * `localStorage.setItem("dbx:debug:sql-error-position", "1")` once (then reload)
+ * to also inspect the drift/offset details.
+ */
+const LOG_TAG = "[DBX][sql-error-position]";
+const DEBUG_FLAG_KEY = "dbx:debug:sql-error-position";
+
+export function isSqlErrorPositionDebugEnabled(): boolean {
+  try {
+    return globalThis.localStorage?.getItem(DEBUG_FLAG_KEY) === "1";
+  } catch {
+    return false;
+  }
+}
+
+/** Emit a diagnostics record. Failures are always logged; success details are verbose-only. */
+export function logSqlErrorPosition(stage: string, payload: Record<string, unknown>): void {
+  console.info(`${LOG_TAG} ${stage}`, payload);
+}
+
+function previewText(value: string | undefined | null, max = 2000): string | undefined {
+  if (value === undefined || value === null) return undefined;
+  return value.length > max ? `${value.slice(0, max)}…(len=${value.length})` : value;
+}
+
+function logDiagnostics(stage: string, options: SqlErrorOffsetOptions, extra: Record<string, unknown>): void {
+  const result = options.result ?? undefined;
+  const details: Record<string, unknown> = {
+    stage,
+    resultIndex: options.resultIndex,
+    editorLength: options.editorSql.length,
+    result: result
+      ? {
+          statementIndex: result.statement_index,
+          executionError: result.execution_error,
+          hasError: Boolean(result.error),
+          errorPosition: result.error?.errorPosition ?? null,
+          sourceStatement: previewText(result.sourceStatement),
+          executedStatement: previewText(result.executedStatement),
+          sourceFrom: result.sourceFrom,
+          sourceTo: result.sourceTo,
+        }
+      : null,
+    editorSliceAtSourceRange: typeof result?.sourceFrom === "number" && typeof result?.sourceTo === "number" ? previewText(options.editorSql.slice(result.sourceFrom, result.sourceTo)) : undefined,
+    editorContainsSourceStatement: result?.sourceStatement ? options.editorSql.includes(result.sourceStatement) : undefined,
+    ...extra,
+  };
+  if (options.editorSql.trim()) {
+    try {
+      details.editorStatements = splitSqlStatementRanges(options.editorSql, options.databaseType, options.parameterOptions).map((statement, index) => ({
+        index,
+        from: statement.from,
+        to: statement.to,
+        sql: previewText(statement.sql, 200),
+      }));
+    } catch (error) {
+      details.editorStatementSplitError = String(error);
+    }
+  }
+  logSqlErrorPosition(stage, details);
+}
+
+/**
+ * Translate a backend-reported SQL error position into an absolute offset in the
+ * current editor document.
+ *
+ * The backend reports the position against the statement text it actually sent.
+ * DBX frequently rewrites the user's statement before execution (pagination
+ * wrappers, appended LIMIT/OFFSET, injected hidden key columns), so the position
+ * is first resolved inside `executedStatement` and then projected back onto the
+ * user's `sourceStatement` before it is placed in the editor.
+ *
+ * Returns `undefined` only when the result carries no position, or when
+ * {@link resultSourceRange} cannot prove the result still maps to the same
+ * statement text in the editor (stale editor / different statement) — jumping
+ * anywhere in that case would be wrong.
+ */
+export function sqlErrorEditorOffset(options: SqlErrorOffsetOptions): EditorErrorPosition | undefined {
+  const position = options.result?.error?.errorPosition;
+  if (!position) {
+    if (isSqlErrorPositionDebugEnabled()) logDiagnostics("skip:no-error-position", options, {});
+    return undefined;
+  }
+
+  const range = resultSourceRange(options.editorSql, options.result ?? undefined, options.resultIndex, options.databaseType, options.parameterOptions);
+  if (!range) {
+    const reason = "resultSourceRange returned undefined: the result's statement text is not found (or no longer unique) in the editor";
+    if (isSqlErrorPositionDebugEnabled()) {
+      logDiagnostics("unresolved:result-source-range", options, { reason });
+    } else {
+      // Redacted failure record: SQL previews (user data) go to the debug-gated diagnostics only.
+      logSqlErrorPosition("unresolved:result-source-range", { reason, resultIndex: options.resultIndex, statementIndex: options.result?.statement_index ?? null });
+    }
+    return undefined;
+  }
+
+  // The position is relative to the executed statement when we recorded one;
+  // older/other results only have the source statement to fall back on.
+  const executedStatement = options.result?.executedStatement;
+  const positionBasis = executedStatement ?? range.sql;
+
+  // Walk the line/column in the text the position is relative to (scalar values,
+  // matching PostgreSQL's character-based cursor), then convert to UTF-16.
+  const basisOffset = scalarPositionToUtf16Offset(positionBasis, position.line, position.column);
+  const drifted = Boolean(executedStatement && executedStatement !== range.sql);
+  const sourceOffset = drifted ? mapExecutedOffsetToSource(executedStatement!, range.sql, basisOffset) : basisOffset;
+
+  // Clamp inside the resolved statement range so a residual mismatch can never
+  // place the caret outside the statement it belongs to.
+  const editorOffset = Math.max(range.from, Math.min(range.from + sourceOffset, range.to));
+  if (isSqlErrorPositionDebugEnabled()) {
+    logDiagnostics("resolved", options, {
+      position,
+      rangeFrom: range.from,
+      rangeTo: range.to,
+      rangeSql: previewText(range.sql),
+      drifted,
+      positionBasis: previewText(positionBasis),
+      basisOffset,
+      sourceOffset,
+      editorOffset,
+    });
+  }
+  return { offset: editorOffset, line: position.line, column: position.column };
+}
+
+/**
+ * Convert a 1-based line/column counted in Unicode scalar values into a UTF-16
+ * offset. Lines beyond the text are clamped to its end (the position is always
+ * relative to `text`, so this only guards malformed/edge input).
+ */
+export function scalarPositionToUtf16Offset(text: string, line: number, column: number): number {
+  const characters = Array.from(text);
+  if (characters.length === 0) return 0;
+  const targetLine = Math.max(1, line);
+  const targetColumn = Math.max(1, column);
+
+  let currentLine = 1;
+  let lineStart = 0;
+  let index = 0;
+  while (index < characters.length && currentLine < targetLine) {
+    if (characters[index] === "\n") {
+      currentLine += 1;
+      lineStart = index + 1;
+    }
+    index += 1;
+  }
+  if (currentLine < targetLine) return text.length;
+
+  let lineEnd = characters.length;
+  for (let cursor = lineStart; cursor < characters.length; cursor += 1) {
+    if (characters[cursor] === "\n") {
+      lineEnd = cursor;
+      break;
+    }
+  }
+
+  const target = Math.min(lineStart + (targetColumn - 1), lineEnd);
+  return characters.slice(0, target).join("").length;
+}
+
+/**
+ * Project a UTF-16 offset in the executed statement onto the original source
+ * statement.
+ *
+ * 1. Pagination wraps (`SELECT * FROM (<sql>) …`) and appended clauses keep the
+ *    original statement contiguous, so a direct substring search resolves them
+ *    exactly.
+ * 2. Injected columns (hidden keys) break contiguity: align the common prefix,
+ *    then let the source resume where its remaining text next appears in the
+ *    executed statement.
+ * 3. Otherwise fall back to a single changed-region alignment between the first
+ *    and last difference.
+ */
+export function mapExecutedOffsetToSource(executed: string, source: string, executedOffset: number): number {
+  if (executed === source) return clamp(executedOffset, 0, source.length);
+  const clampedExecuted = clamp(executedOffset, 0, executed.length);
+
+  const direct = executed.indexOf(source);
+  if (direct >= 0) return clamp(clampedExecuted - direct, 0, source.length);
+
+  const prefix = commonPrefixLength(executed, source);
+  const remainder = source.slice(prefix);
+  if (remainder.length >= 2) {
+    const resume = executed.indexOf(remainder, prefix);
+    if (resume >= 0) {
+      if (clampedExecuted < resume) return Math.min(clampedExecuted, prefix);
+      return clamp(clampedExecuted - (resume - prefix), prefix, source.length);
+    }
+  }
+
+  const suffix = commonSuffixLength(executed, source, prefix);
+  const executedChangeEnd = executed.length - suffix;
+  const sourceChangeEnd = source.length - suffix;
+  if (clampedExecuted <= prefix) return clampedExecuted;
+  if (clampedExecuted >= executedChangeEnd) {
+    return clamp(clampedExecuted - (executedChangeEnd - sourceChangeEnd), prefix, sourceChangeEnd);
+  }
+  return prefix;
+}
+
+function commonPrefixLength(a: string, b: string): number {
+  let index = 0;
+  const max = Math.min(a.length, b.length);
+  while (index < max && a[index] === b[index]) index += 1;
+  return index;
+}
+
+function commonSuffixLength(a: string, b: string, prefix: number): number {
+  let index = 0;
+  const max = Math.min(a.length, b.length) - prefix;
+  while (index < max && a[a.length - 1 - index] === b[b.length - 1 - index]) index += 1;
+  return index;
+}
+
+function clamp(value: number, min: number, max: number): number {
+  if (max < min) return min;
+  return Math.max(min, Math.min(value, max));
+}
diff --git a/apps/desktop/src/lib/tabs/contentSurfaceEvents.ts b/apps/desktop/src/lib/tabs/contentSurfaceEvents.ts
index 2ce072475d..ba8457fa13 100644
--- a/apps/desktop/src/lib/tabs/contentSurfaceEvents.ts
+++ b/apps/desktop/src/lib/tabs/contentSurfaceEvents.ts
@@ -43,6 +43,7 @@ export const contentSurfaceEventNames = [
   "structureEditorClose",
   "previewStatement",
   "focusStatement",
+  "focusErrorOffset",
   "openSettings",
   "openConnectionSettings",
   "toggleZenMode",
diff --git a/apps/desktop/src/lib/tabs/tabPresentation.ts b/apps/desktop/src/lib/tabs/tabPresentation.ts
index 6546637b3f..9ddbcac58c 100644
--- a/apps/desktop/src/lib/tabs/tabPresentation.ts
+++ b/apps/desktop/src/lib/tabs/tabPresentation.ts
@@ -8,6 +8,7 @@ import { executableStatementRanges, splitSqlStatementRanges, sqlStatementParamet
 import type { SqlParameterOptions } from "@/lib/sql/sqlParameters";
 import { sqlTextFingerprint } from "@/lib/sql/sqlTextFingerprint";
 import { isQueryExecutionErrorResult } from "@/lib/query/queryResultError";
+import type { SqlErrorPosition } from "@/lib/backend/errorUtils";
 import type { BatchSqlExecution, ConnectionConfig, DatabaseType, QueryResult, QueryTab } from "@/types/database";
 
 type Translate = (key: string, params?: Record<string, unknown>) => string;
@@ -416,6 +417,8 @@ export interface ExecutionSummaryItem {
   sourceTo?: number;
   status: "pending" | "running" | "success" | "error" | "skipped" | "cancelled";
   error?: string;
+  /** Backend-reported error row/column, when the driver provides one. */
+  errorPosition?: SqlErrorPosition;
   returnedColumns: number;
   returnedRows: number;
   affectedRows: number;
@@ -446,6 +449,7 @@ export function executionSummaryItems(tab: Pick<QueryTab, "result" | "results" |
         sourceTo: item.to,
         status: item.status,
         error: item.error,
+        errorPosition: item.errorDetails?.errorPosition ?? result?.error?.errorPosition,
         returnedColumns: result?.columns.length ?? 0,
         returnedRows,
         affectedRows,
@@ -467,6 +471,7 @@ export function executionSummaryItems(tab: Pick<QueryTab, "result" | "results" |
       sourceTo: result.sourceTo,
       status: isError ? "error" : "success",
       error: isError ? String(result.rows[0]?.[0] ?? "") : undefined,
+      errorPosition: result.error?.errorPosition,
       returnedColumns: result.columns.length,
       returnedRows: result.rows.length,
       affectedRows: result.affected_rows,
diff --git a/apps/desktop/src/stores/__tests__/queryStore.multiStatementError.spec.ts b/apps/desktop/src/stores/__tests__/queryStore.multiStatementError.spec.ts
index 837f0a14cb..d7489a0d50 100644
--- a/apps/desktop/src/stores/__tests__/queryStore.multiStatementError.spec.ts
+++ b/apps/desktop/src/stores/__tests__/queryStore.multiStatementError.spec.ts
@@ -214,6 +214,39 @@ describe("queryStore multi-statement errors", () => {
     expect(tab.batchSqlExecution?.items[0]?.error).toContain(originalMessage);
   });
 
+  it("annotates a thrown single-statement error so the locate flow keeps its source", async () => {
+    const position = { line: 1, column: 16, offset: 15 };
+    const structuredError = {
+      ...structuredSqlError('ERROR: relation "no_such_table" does not exist'),
+      errorPosition: position,
+    };
+    mocks.prepareQueryPaginationExecutionPlan.mockImplementationOnce(async (options) => ({
+      sqlToExecute: `${options.sql} LIMIT 100`,
+      pageSql: undefined,
+      pageLimit: undefined,
+      pageOffset: undefined,
+      countSql: undefined,
+      useAgentResultSession: false,
+    }));
+    mocks.executeMulti.mockRejectedValue(
+      new BackendErrorException({
+        backendError: structuredError,
+        message: 'ERROR: relation "no_such_table" does not exist',
+      }),
+    );
+    const { useQueryStore } = await import("@/stores/queryStore");
+    const store = useQueryStore();
+    const tabId = store.createTab("mysql-1", "app", "Query");
+
+    await store.executeTabSql(tabId, "SELECT * FROM no_such_table");
+
+    const tab = store.tabs.find((item) => item.id === tabId)!;
+    expect(tab.result?.execution_error).toBe(true);
+    expect(tab.result?.error?.errorPosition).toEqual(position);
+    expect(tab.result?.sourceStatement).toBe("SELECT * FROM no_such_table");
+    expect(tab.result?.executedStatement).toBe("SELECT * FROM no_such_table LIMIT 100");
+  });
+
   it("updates live per-statement progress before the batch promise resolves", async () => {
     const pendingExecution = deferred<any[]>();
     let reportProgress!: (progress: any) => void;
diff --git a/apps/desktop/src/stores/queryStore.ts b/apps/desktop/src/stores/queryStore.ts
index 09e8ac479e..8c03b1c01a 100644
--- a/apps/desktop/src/stores/queryStore.ts
+++ b/apps/desktop/src/stores/queryStore.ts
@@ -8,6 +8,7 @@ import { sanitizeTabPageUiState } from "@/lib/tabs/tabUiState";
 import type { BatchSqlExecution, ConnectionConfig, DatabaseType, IndexInfo, NacosConfigEditorViewport, ObjectBrowserFilter, ObjectBrowserViewport, ObjectSource, ObjectSourceKind, QueryResult, QueryResultSourceColumnRef, QueryTab, TableInfoTab, TableStructureEditorTarget } from "@/types/database";
 import { orderPinnedFirst } from "@/lib/app/pinnedItems";
 import { canCancelQueryExecution } from "@/lib/sql/queryExecutionState";
+import { isSqlErrorPositionDebugEnabled, logSqlErrorPosition } from "@/lib/sql/errorPosition";
 import { buildExplainSql, parseExplainResult, parseDamengExplainText, parseOracleExplainText, sqlServerExplainResult, type BuildExplainSqlResult, type ExplainPlanDatabaseType } from "@/lib/diagram/explainPlan";
 import { mysqlExplainCompatibilityHint } from "@/lib/diagram/mysqlExplainCompatibility";
 import { allEditableColumnsWriteable, allPrimaryKeysPresent, analyzeEditableQueryEditability, analyzeSelectStructureForDisplay, resolveMetadataColumnName, resolveSourceColumnsByOrdinal, sourceColumnsForResult, type EditableQueryInfo, type EditableQuerySource } from "@/lib/sql/sqlAnalysis";
@@ -345,8 +346,14 @@ function preservedResultIndex(results: QueryResult[], currentIndex: number | und
   return currentIndex;
 }
 
-function annotateQueryResultSources(results: QueryResult[], sql: string, database: string | undefined, databaseType?: DatabaseType, sourceOffset?: number, parameterOptions?: SqlParameterOptions): { results: QueryResult[]; sqlServerUseDatabase?: string } {
+function annotateQueryResultSources(results: QueryResult[], sql: string, database: string | undefined, databaseType?: DatabaseType, sourceOffset?: number, parameterOptions?: SqlParameterOptions, executedSql?: string): { results: QueryResult[]; sqlServerUseDatabase?: string } {
   const statements = splitSqlStatementRanges(sql, databaseType, parameterOptions);
+  // The backend positions errors against the SQL it actually received. When the
+  // sent SQL was rewritten (pagination wrapper, injected hidden keys…), record
+  // each statement's executed text so the error mapper can project the position
+  // back onto `sourceStatement`.
+  const executedStatements = executedSql && executedSql !== sql ? splitSqlStatementRanges(executedSql, databaseType, parameterOptions) : undefined;
+  const alignedExecutedStatements = executedStatements && executedStatements.length === statements.length ? executedStatements : undefined;
   let statementIndex = 0;
   let sourceDatabase = database;
   let sqlServerUseDatabase: string | undefined;
@@ -357,6 +364,19 @@ function annotateQueryResultSources(results: QueryResult[], sql: string, databas
     const statement = statements[sourceIndex];
     if (!statement) continue;
     annotateQueryResultSource(result, statement.sql, sourceDatabase, databaseType, sourceOffset === undefined ? undefined : { from: sourceOffset + statement.from, to: sourceOffset + statement.to });
+    const executedStatement = alignedExecutedStatements?.[sourceIndex]?.sql;
+    if (executedStatement && executedStatement !== statement.sql) {
+      result.executedStatement = executedStatement;
+      if (isSqlErrorPositionDebugEnabled()) {
+        logSqlErrorPosition("executed-statement-drift", {
+          statementIndex: sourceIndex,
+          sourceStatement: statement.sql,
+          executedStatement,
+          resultIsError: result.execution_error === true,
+          errorPosition: result.error?.errorPosition ?? null,
+        });
+      }
+    }
     const customName = queryResultNameFromPreamble(sql.slice(statement.hitFrom, statement.from));
     if (customName) result.sourceLabel = customName;
     const successfulUseDatabase = databaseType === "sqlserver" && result.execution_error !== true ? sqlServerUseDatabaseFromStatement(statement.sql) : undefined;
@@ -368,6 +388,22 @@ function annotateQueryResultSources(results: QueryResult[], sql: string, databas
   return { results, sqlServerUseDatabase };
 }
 
+/**
+ * Annotate the synthesized error result of a thrown single-statement execution
+ * so the row/column locate flow can map the backend position back to the editor.
+ *
+ * The core returns per-statement error results for batches, but a
+ * single-statement failure aborts the whole execute-multi command, leaving the
+ * frontend to synthesize the error result here. Only annotated when the error
+ * actually carries a position and the submission is a single statement (a
+ * multi-statement thrown error's position cannot be attributed to one statement).
+ */
+function annotateSingleStatementErrorResult(errorResult: QueryResult, sourceSql: string, databaseType: DatabaseType | undefined, sourceOffset: number | undefined, parameterOptions: SqlParameterOptions | undefined, executedSql: string | undefined): void {
+  if (!errorResult.error?.errorPosition) return;
+  if (splitSqlStatementRanges(sourceSql, databaseType, parameterOptions).length !== 1) return;
+  annotateQueryResultSources([errorResult], sourceSql, undefined, databaseType, sourceOffset, parameterOptions, executedSql);
+}
+
 const NON_STREAMING_BATCH_DATABASE_TYPES = new Set<DatabaseType>(["sqlserver", "turso", "cloudflare-d1"]);
 const liveBatchSqlExecutions = new WeakMap<QueryTab, BatchSqlExecution>();
 
@@ -6175,6 +6211,11 @@ export const useQueryStore = defineStore("query", () => {
     let producedResult = false;
     const resumedExecutionTarget = batchResume?.batch.executionTarget;
     const executionConnectionId = resumedExecutionTarget?.connectionId ?? options?.executionTarget?.connectionId ?? tab.connectionId;
+    // Captured for the catch below: a single-statement failure aborts the whole
+    // execute-multi command (the core only returns per-statement error results
+    // for batches), so the synthesized error result must be annotated here for
+    // the row/column locate flow. These locals live inside the try block.
+    let errorLocateContext: { databaseType: DatabaseType | undefined; parameterOptions: SqlParameterOptions | undefined; sourceOffset: number | undefined; executedSql: string | undefined } | undefined;
     try {
       await waitForTabSessionReset(id);
       const connStore = useConnectionStore();
@@ -6880,6 +6921,13 @@ export const useQueryStore = defineStore("query", () => {
         useAgentResultSession = conn?.db_type === "sqlserver" && conn?.driver_profile?.trim().toLowerCase() === "sqlserver-legacy";
       }
 
+      errorLocateContext = {
+        databaseType: effectiveDbType,
+        parameterOptions: sqlStatementParameterOptions,
+        sourceOffset: options?.sourceOffset,
+        executedSql: sqlToExecute,
+      };
+
       const executionSchema = connectionQueryExecutionSchema(conn, targetDatabase, targetSchema, tab.mode === "data");
       // Jumping to a non-zero offset without a live cursor session: the plan
       // could not rewrite the SQL for these engines, so a plain execution
@@ -7051,6 +7099,7 @@ export const useQueryStore = defineStore("query", () => {
         effectiveDbType,
         options?.sourceOffset,
         sqlStatementParameterOptions,
+        sqlToExecute,
       );
       const results = offsetBatchQueryResultIndexes(annotatedResults.results, batchResume?.startStatementIndex ?? 0);
       reconcileBatchSqlResults(tab, executionId, results);
@@ -7319,6 +7368,7 @@ export const useQueryStore = defineStore("query", () => {
           return false;
         }
         const errorResult = toErrorResult(e);
+        annotateSingleStatementErrorResult(errorResult, queryBaseSql, errorLocateContext?.databaseType, errorLocateContext?.sourceOffset, errorLocateContext?.parameterOptions, errorLocateContext?.executedSql);
         const activeGroupIndex = current.activeResultIndex;
         const activeGroupResults = current.results;
         const shouldReplaceActiveResultInGroup = options?.replaceActiveResultInGroup === true && Array.isArray(activeGroupResults) && typeof activeGroupIndex === "number" && activeGroupIndex >= 0 && activeGroupIndex < activeGroupResults.length;
diff --git a/apps/desktop/src/types/database.ts b/apps/desktop/src/types/database.ts
index 73c336ce21..cd3185e738 100644
--- a/apps/desktop/src/types/database.ts
+++ b/apps/desktop/src/types/database.ts
@@ -1083,6 +1083,13 @@ export interface QueryResult {
   /** Absolute offsets in the editor document at execution time. */
   sourceFrom?: number;
   sourceTo?: number;
+  /**
+   * Frontend-internal: the statement text actually sent for this result when it
+   * differs from `sourceStatement` (pagination wrapping, hidden-key rewrites…).
+   * Backend SQL error positions are relative to this text, so it is needed to
+   * map an error row/column back onto the user's original statement.
+   */
+  executedStatement?: string;
   /** Database server messages (notices, warnings) emitted while producing this result. Omitted when empty. */
   messages?: QueryMessage[];
 }
diff --git a/crates/dbx-core/src/backend_error.rs b/crates/dbx-core/src/backend_error.rs
index 70adcc1650..6e1467ad5f 100644
--- a/crates/dbx-core/src/backend_error.rs
+++ b/crates/dbx-core/src/backend_error.rs
@@ -125,6 +125,11 @@ pub struct BackendError {
     diagnostics: Option<BackendErrorDiagnostics>,
     #[serde(skip_serializing_if = "Option::is_none")]
     help_url: Option<String>,
+    /// Driver-reported SQL error position, when the adapter provides one
+    /// (currently native PostgreSQL). Optional field, added without bumping the
+    /// envelope version; clients that do not understand it simply ignore it.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    error_position: Option<crate::sql_error_position::SqlErrorPosition>,
 }
 
 impl BackendError {
@@ -270,6 +275,14 @@ impl BackendError {
         )
     }
 
+    /// Create a SQL failure envelope while retaining bounded native driver detail
+    /// and a driver-reported error position.
+    pub fn from_sql_detail_with_position(message: &str, position: crate::sql_error_position::SqlErrorPosition) -> Self {
+        let mut error = Self::from_sql_detail(message);
+        error.error_position = Some(position);
+        error
+    }
+
     /// Adapt a DuckDB worker error while retaining both the native detail and
     /// the worker protocol code for diagnostics at the public boundary.
     pub fn from_duckdb_worker_error(code: &str, message: &str) -> Self {
@@ -350,6 +363,10 @@ impl BackendError {
         self.diagnostics.as_ref()
     }
 
+    pub fn error_position(&self) -> Option<crate::sql_error_position::SqlErrorPosition> {
+        self.error_position
+    }
+
     fn new(
         entry: &'static CatalogEntry,
         source: BackendErrorSource,
@@ -372,6 +389,7 @@ impl BackendError {
             detail,
             diagnostics,
             help_url: entry.help_url.map(str::to_string),
+            error_position: None,
         }
     }
 }
@@ -673,6 +691,8 @@ fn bounded_text(value: &str, max_bytes: usize) -> String {
 }
 
 fn bounded_detail(message: &str) -> Option<String> {
+    let stripped = crate::sql_error_position::strip_marker(message);
+    let message = stripped.as_str();
     if message.trim().is_empty() {
         return None;
     }
@@ -684,7 +704,10 @@ fn bounded_detail(message: &str) -> Option<String> {
 fn bounded_native_detail(message: &str) -> Option<String> {
     // This path is only for typed native SQL failures. Do not infer or rewrite
     // SQL content here; preserving the driver's diagnostic is the contract.
-    let trimmed = message.trim();
+    // The position transport suffix is stripped because it is surfaced through
+    // the structured `errorPosition` field, not as message text.
+    let stripped = crate::sql_error_position::strip_marker(message);
+    let trimmed = stripped.trim();
     if trimmed.is_empty() {
         return None;
     }
@@ -1141,6 +1164,34 @@ mod tests {
         assert_eq!(payload["origin"]["adapter"], "native");
     }
 
+    #[test]
+    fn sql_error_with_position_exposes_typed_error_position_and_keeps_v1_detail() {
+        let position = crate::sql_error_position::SqlErrorPosition { line: 2, column: 6, offset: 12 };
+        let payload = serde_json::to_value(BackendError::from_sql_detail_with_position(
+            "ERROR: relation \"missing\" does not exist",
+            position,
+        ))
+        .unwrap();
+
+        assert_eq!(payload["code"], "DBX-JDBC-4001");
+        assert_eq!(payload["detail"], "ERROR: relation \"missing\" does not exist");
+        assert_eq!(payload["errorPosition"]["line"], 2);
+        assert_eq!(payload["errorPosition"]["column"], 6);
+        assert_eq!(payload["errorPosition"]["offset"], 12);
+        assert_eq!(payload["origin"]["adapter"], "native");
+
+        // SQL errors without a position must not emit the optional field.
+        let plain = serde_json::to_value(BackendError::from_sql_detail("ERROR: nope")).unwrap();
+        assert!(plain.get("errorPosition").is_none());
+    }
+
+    #[test]
+    fn detail_sanitizers_strip_the_position_transport_marker() {
+        let message = format!("ERROR: relation does not exist{}", crate::sql_error_position::encode_marker(15));
+        assert_eq!(bounded_native_detail(&message).as_deref(), Some("ERROR: relation does not exist"));
+        assert_eq!(bounded_detail(&message).as_deref(), Some("ERROR: relation does not exist"));
+    }
+
     #[test]
     fn duckdb_worker_sql_error_preserves_worker_code_detail_and_driver_origin() {
         let payload = serde_json::to_value(BackendError::from_duckdb_worker_error(
diff --git a/crates/dbx-core/src/db/postgres.rs b/crates/dbx-core/src/db/postgres.rs
index 0fb5ead2e5..fd6c228af6 100644
--- a/crates/dbx-core/src/db/postgres.rs
+++ b/crates/dbx-core/src/db/postgres.rs
@@ -1480,6 +1480,25 @@ fn escape_tsvector_lexeme(value: &str) -> String {
 }
 
 fn pg_error_to_string(err: tokio_postgres::Error) -> String {
+    let Some(db_error) = err.as_db_error() else {
+        return err.to_string();
+    };
+    let mut message = db_error.to_string();
+    // Carry the server-reported cursor position across the `db` layer's
+    // `Result<_, String>` boundary; `query.rs` resolves it against the executed
+    // statement and strips the suffix before the message reaches any client.
+    if let Some(tokio_postgres::error::ErrorPosition::Original(cursor)) = db_error.position() {
+        message.push_str(&crate::sql_error_position::encode_marker(*cursor));
+    }
+    message
+}
+
+/// Same as [`pg_error_to_string`] but never carries a cursor position.
+///
+/// Used for infrastructure/setup statements (search_path, BEGIN/ROLLBACK, …)
+/// whose SQL is not the statement the user is editing: a marker from those would
+/// be resolved against the user's SQL and point at the wrong place.
+fn pg_error_to_string_plain(err: tokio_postgres::Error) -> String {
     err.as_db_error().map(ToString::to_string).unwrap_or_else(|| err.to_string())
 }
 
@@ -2822,7 +2841,10 @@ async fn set_automatic_postgres_timezone(client: &deadpool_postgres::Client, tim
                 }
             }
             Err(error) => {
-                return Err(format!("PostgreSQL SET timezone failed after connecting: {}", pg_error_to_string(error)));
+                return Err(format!(
+                    "PostgreSQL SET timezone failed after connecting: {}",
+                    pg_error_to_string_plain(error)
+                ));
             }
         }
     }
@@ -8025,7 +8047,7 @@ pub(crate) async fn execute_postgres_infra_statement(
     tokio::time::timeout(timeout_duration, client.execute_typed(sql, &[]))
         .await
         .map_err(|_| format!("PostgreSQL {stage} timed out after {} seconds", timeout_duration.as_secs()))?
-        .map_err(pg_error_to_string)
+        .map_err(pg_error_to_string_plain)
 }
 
 pub(crate) async fn wait_postgres_operation<T, F>(
diff --git a/crates/dbx-core/src/lib.rs b/crates/dbx-core/src/lib.rs
index 3ebce7875c..7738bcf8ae 100644
--- a/crates/dbx-core/src/lib.rs
+++ b/crates/dbx-core/src/lib.rs
@@ -93,6 +93,7 @@ pub mod sql_analysis;
 pub mod sql_diagnostics;
 pub mod sql_dialect;
 pub mod sql_editability;
+pub mod sql_error_position;
 pub mod sql_file_import;
 pub mod sql_parser;
 pub mod sql_risk;
diff --git a/crates/dbx-core/src/query.rs b/crates/dbx-core/src/query.rs
index 00cc80be43..a03d88acb5 100644
--- a/crates/dbx-core/src/query.rs
+++ b/crates/dbx-core/src/query.rs
@@ -68,23 +68,43 @@ pub enum PoolErrorAction {
 #[derive(Debug, Clone)]
 pub enum QueryExecutionError {
     Agent(AgentCallError),
-    DuckDb { code: String, message: String },
-    Canceled { stage: AgentErrorStage, operation_outcome: AgentOperationOutcome },
+    DuckDb {
+        code: String,
+        message: String,
+    },
+    Canceled {
+        stage: AgentErrorStage,
+        operation_outcome: AgentOperationOutcome,
+    },
     Timeout(String),
     Sql(String),
+    /// Native PostgreSQL SQL failure whose driver-reported cursor position was
+    /// resolved against the executed statement text. Kept distinct from
+    /// [`Self::Sql`] so the position survives `classify_query_error` and reaches
+    /// [`Self::into_backend_error`] as a typed field instead of being parsed back
+    /// out of a string.
+    SqlWithPosition {
+        message: String,
+        position: crate::sql_error_position::SqlErrorPosition,
+    },
     Legacy(String),
 }
 
 impl QueryExecutionError {
     pub fn into_legacy_string(self) -> String {
-        match self {
+        let mut message = match self {
             Self::Agent(error) => error.into_legacy_string(),
             Self::DuckDb { message, .. } => message,
             Self::Canceled { .. } => canceled_error(),
             Self::Timeout(error) => error,
             Self::Sql(error) => error,
+            Self::SqlWithPosition { message, .. } => message,
             Self::Legacy(error) => error,
-        }
+        };
+        // Defensive: any remaining transport marker (e.g. from a driver error
+        // that never passed through the resolve step) must not reach clients.
+        while crate::sql_error_position::take_marker(&mut message).is_some() {}
+        message
     }
 
     pub fn into_backend_error(self) -> crate::backend_error::BackendError {
@@ -98,6 +118,9 @@ impl QueryExecutionError {
             }
             Self::Timeout(error) => crate::backend_error::BackendError::from_timeout_detail(&error),
             Self::Sql(error) => crate::backend_error::BackendError::from_sql_detail(&error),
+            Self::SqlWithPosition { message, position } => {
+                crate::backend_error::BackendError::from_sql_detail_with_position(&message, position)
+            }
             Self::Legacy(error) => crate::backend_error::BackendError::from_legacy_string(&error),
         }
     }
@@ -111,6 +134,9 @@ impl QueryExecutionError {
             canceled @ Self::Canceled { .. } => canceled,
             Self::Timeout(error) => Self::Timeout(query_error_with_omitted_sql_context(&error, sql)),
             Self::Sql(error) => Self::Sql(append_typed_sql_error_context(&error, sql)),
+            Self::SqlWithPosition { message, position } => {
+                Self::SqlWithPosition { message: append_typed_sql_error_context(&message, sql), position }
+            }
             Self::Legacy(error) => Self::Legacy(query_error_with_omitted_sql_context(&error, sql)),
         }
     }
@@ -122,6 +148,9 @@ impl QueryExecutionError {
             canceled @ Self::Canceled { .. } => canceled,
             Self::Timeout(error) => Self::Timeout(format!("{error}; {context}")),
             Self::Sql(error) => Self::Sql(format!("{error}; {context}")),
+            Self::SqlWithPosition { message, position } => {
+                Self::SqlWithPosition { message: format!("{message}; {context}"), position }
+            }
             Self::Legacy(error) => Self::Legacy(format!("{error}; {context}")),
         }
     }
@@ -129,7 +158,12 @@ impl QueryExecutionError {
     fn as_agent_error(&self) -> Option<&AgentCallError> {
         match self {
             Self::Agent(error) => Some(error),
-            Self::DuckDb { .. } | Self::Canceled { .. } | Self::Timeout(_) | Self::Sql(_) | Self::Legacy(_) => None,
+            Self::DuckDb { .. }
+            | Self::Canceled { .. }
+            | Self::Timeout(_)
+            | Self::Sql(_)
+            | Self::SqlWithPosition { .. }
+            | Self::Legacy(_) => None,
         }
     }
 }
@@ -142,6 +176,7 @@ impl std::fmt::Display for QueryExecutionError {
             Self::Canceled { .. } => formatter.write_str(QUERY_CANCELED),
             Self::Timeout(error) => formatter.write_str(error),
             Self::Sql(error) => formatter.write_str(error),
+            Self::SqlWithPosition { message, .. } => formatter.write_str(message),
             Self::Legacy(error) => formatter.write_str(error),
         }
     }
@@ -1490,6 +1525,7 @@ fn query_execution_error_action(
         QueryExecutionError::DuckDb { message, .. } => query_pool_error_action(db_type, sql, message),
         QueryExecutionError::Timeout(message)
         | QueryExecutionError::Sql(message)
+        | QueryExecutionError::SqlWithPosition { message, .. }
         | QueryExecutionError::Legacy(message) => query_pool_error_action(db_type, sql, message),
         QueryExecutionError::Agent(_) => unreachable!("Agent errors return above"),
     }
@@ -2345,7 +2381,23 @@ async fn do_execute_typed(
             if let Some(duckdb_error) = typed_duckdb_error {
                 return QueryExecutionError::DuckDb { code: duckdb_error.code, message: duckdb_error.message };
             }
-            typed_agent_error.map_or_else(|| QueryExecutionError::Legacy(error), QueryExecutionError::Agent)
+            if let Some(agent_error) = typed_agent_error {
+                return QueryExecutionError::Agent(agent_error);
+            }
+            // PostgreSQL reports a cursor position as a marker suffix on the
+            // driver message. Resolve it here, while the executed statement text
+            // is still available, into a typed field. The marker is stripped even
+            // when it cannot be resolved, so it can never reach a user-facing
+            // message. The PostgreSQL driver also backs Redshift/GaussDB/Kwdb/
+            // QuestDB/openGauss, so this is not gated on `DatabaseType::Postgres`.
+            if error.contains(crate::sql_error_position::SQL_ERROR_POSITION_MARKER) {
+                let (message, position) = crate::sql_error_position::take_message_position(&error, sql);
+                return match position {
+                    Some(position) => QueryExecutionError::SqlWithPosition { message, position },
+                    None => QueryExecutionError::Legacy(message),
+                };
+            }
+            QueryExecutionError::Legacy(error)
         })
         .map_err(|error| classify_query_error(pool_db_type, error))
 }
@@ -8749,6 +8801,46 @@ for line in sys.stdin:
         assert_eq!(error.into_backend_error().code(), "DBX-JDBC-1002");
     }
 
+    #[test]
+    fn postgres_sql_error_with_position_survives_classification_and_legacy_rendering() {
+        let sql = "SELECT *\nFROM no_such_table";
+        let cursor = sql.find("no_such_table").unwrap() as u32 + 1;
+        let raw = format!(
+            "ERROR: relation \"no_such_table\" does not exist{}",
+            crate::sql_error_position::encode_marker(cursor)
+        );
+        let (message, position) = crate::sql_error_position::take_message_position(&raw, sql);
+        let error = QueryExecutionError::SqlWithPosition { message, position: position.unwrap() };
+
+        // The transport marker must never reach the user-facing message.
+        let legacy = error.clone().into_legacy_string();
+        assert!(!legacy.contains(crate::sql_error_position::SQL_ERROR_POSITION_MARKER));
+        assert_eq!(legacy, "ERROR: relation \"no_such_table\" does not exist");
+
+        // Classification must not downgrade the typed variant.
+        let classified = classify_query_error(Some(DatabaseType::Postgres), error.clone());
+        assert!(matches!(classified, QueryExecutionError::SqlWithPosition { .. }));
+
+        let backend_error = classified.into_backend_error();
+        assert_eq!(backend_error.code(), "DBX-JDBC-4001");
+        let position = backend_error.error_position().expect("position must survive into the envelope");
+        assert_eq!((position.line, position.column), (2, 6));
+    }
+
+    #[test]
+    fn legacy_rendering_strips_a_leftover_transport_marker() {
+        // Guards the driver-error path that never went through the resolve step
+        // (e.g. a PostgreSQL-family driver error shown as a legacy string).
+        let error = QueryExecutionError::Legacy(format!(
+            "ERROR: boom{}{}",
+            crate::sql_error_position::encode_marker(9),
+            crate::sql_error_position::encode_marker(2)
+        ));
+        let rendered = error.into_legacy_string();
+        assert_eq!(rendered, "ERROR: boom");
+        assert!(!rendered.contains(crate::sql_error_position::SQL_ERROR_POSITION_MARKER));
+    }
+
     #[test]
     fn duckdb_worker_error_preserves_catalog_identity_and_detail() {
         let error = QueryExecutionError::DuckDb {
diff --git a/crates/dbx-core/src/sql_error_position.rs b/crates/dbx-core/src/sql_error_position.rs
new file mode 100644
index 0000000000..242b9f0883
--- /dev/null
+++ b/crates/dbx-core/src/sql_error_position.rs
@@ -0,0 +1,255 @@
+//! Driver-reported SQL error positions (currently PostgreSQL only).
+//!
+//! PostgreSQL reports a 1-based *character* cursor position for many SQL
+//! errors ([`tokio_postgres::error::ErrorPosition::Original`]). The native
+//! driver error path in `db::postgres` only exposes a `String` to the query
+//! layer, so the raw cursor is carried across that `String` ABI as a small
+//! machine-readable suffix and resolved back into a typed [`SqlErrorPosition`]
+//! as soon as the executed statement text is available.
+//!
+//! The suffix is a position carrier, not an error classifier: nothing about the
+//! error category, retryability or recovery is inferred from it, and
+//! [`strip_marker`] guarantees it can never surface in a user-facing message.
+
+use serde::{Deserialize, Serialize};
+
+/// Suffix appended to a driver error message to carry a raw PostgreSQL cursor
+/// position across the `Result<_, String>` boundary of the `db` layer.
+pub const SQL_ERROR_POSITION_MARKER: &str = "\nDBX_SQL_ERROR_POSITION:";
+
+/// A SQL error position relative to the statement text that was actually sent
+/// to the database.
+///
+/// `line`/`column` are 1-based and counted in Unicode scalar values (matching
+/// PostgreSQL's character-based cursor positions); `offset` is the 0-based
+/// scalar-value index into the statement text.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct SqlErrorPosition {
+    pub line: u32,
+    pub column: u32,
+    pub offset: u32,
+}
+
+impl SqlErrorPosition {
+    /// Convert a PostgreSQL 1-based character cursor into a line/column/offset.
+    ///
+    /// Returns `None` when the cursor is unusable (zero, non-positive, or the
+    /// statement is empty). A cursor past the end (`position == len + 1`, e.g.
+    /// "unexpected end of input") is clamped to the last character.
+    pub fn from_pg_cursor(statement_sql: &str, cursor: u32) -> Option<Self> {
+        if cursor == 0 {
+            return None;
+        }
+        let total = statement_sql.chars().count() as u32;
+        if total == 0 {
+            return None;
+        }
+        let target = (cursor - 1).min(total - 1);
+        let mut line = 1u32;
+        let mut column = 1u32;
+        for (index, ch) in statement_sql.chars().enumerate() {
+            if index as u32 == target {
+                return Some(Self { line, column, offset: target });
+            }
+            if ch == '\n' {
+                line += 1;
+                column = 1;
+            } else {
+                column += 1;
+            }
+        }
+        None
+    }
+}
+
+/// Encode a raw cursor as the transport suffix.
+pub fn encode_marker(cursor: u32) -> String {
+    format!("{SQL_ERROR_POSITION_MARKER}{cursor}")
+}
+
+/// Remove every marker from `message` and return the cursors they carried.
+///
+/// Markers are removed even when followed by more text (the read-only
+/// transaction path can append a cleanup error after one, e.g.
+/// `...<marker>15; rollback failed`), so the trailing text is preserved. A
+/// malformed or absent suffix leaves `message` untouched and is not collected.
+fn take_all_markers(message: &mut String) -> Vec<u32> {
+    let mut cursors = Vec::new();
+    while let Some(cursor) = take_marker(message) {
+        cursors.push(cursor);
+    }
+    cursors
+}
+
+/// Remove a marker from `message` and return the raw cursor it carried.
+///
+/// See [`take_all_markers`] for the multi-marker behaviour.
+pub fn take_marker(message: &mut String) -> Option<u32> {
+    let index = message.rfind(SQL_ERROR_POSITION_MARKER)?;
+    let digits_start = index + SQL_ERROR_POSITION_MARKER.len();
+    let digits_end = message[digits_start..]
+        .find(|ch: char| !ch.is_ascii_digit())
+        .map_or(message.len(), |offset| digits_start + offset);
+    let cursor = message[digits_start..digits_end].parse::<u32>().ok()?;
+    message.replace_range(index..digits_end, "");
+    Some(cursor)
+}
+
+/// Return `message` with every transport suffix stripped.
+pub fn strip_marker(message: &str) -> String {
+    let mut owned = message.to_string();
+    let _ = take_all_markers(&mut owned);
+    owned
+}
+
+/// Strip all transport suffixes from `message` and, when possible, resolve the
+/// carried cursor against the executed statement text into a typed position.
+///
+/// The returned message is always marker-free. The position is only resolved
+/// when exactly one marker was present: a message carrying several markers (e.g.
+/// a user-statement error merged with an infrastructure error) cannot be
+/// attributed to a single statement, and guessing would point at the wrong spot.
+pub fn take_message_position(message: &str, statement_sql: &str) -> (String, Option<SqlErrorPosition>) {
+    let mut cleaned = message.to_string();
+    let cursors = take_all_markers(&mut cleaned);
+    if cursors.len() != 1 {
+        return (cleaned, None);
+    }
+    let position = SqlErrorPosition::from_pg_cursor(statement_sql, cursors[0]);
+    (cleaned, position)
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn cursor_maps_to_line_and_column() {
+        let sql = "SELECT *\nFROM no_such_table";
+        // 1-based cursor of the 'n' in no_such_table (second line, column 6).
+        let cursor = sql.find("no_such_table").unwrap() as u32 + 1;
+        let position = SqlErrorPosition::from_pg_cursor(sql, cursor).unwrap();
+        assert_eq!(position.line, 2);
+        assert_eq!(position.column, 6);
+        assert_eq!(position.offset, sql[..sql.find("no_such_table").unwrap()].chars().count() as u32);
+    }
+
+    #[test]
+    fn first_character_is_line_one_column_one() {
+        let position = SqlErrorPosition::from_pg_cursor("SELECT 1", 1).unwrap();
+        assert_eq!((position.line, position.column, position.offset), (1, 1, 0));
+    }
+
+    #[test]
+    fn crlf_treats_carriage_return_as_a_column() {
+        let sql = "SELECT 1\r\nFROM t";
+        let cursor = sql.find("FROM").unwrap() as u32 + 1;
+        let position = SqlErrorPosition::from_pg_cursor(sql, cursor).unwrap();
+        assert_eq!(position.line, 2);
+        assert_eq!(position.column, 1);
+    }
+
+    #[test]
+    fn multi_byte_characters_count_as_one_column() {
+        // '表' is 3 UTF-8 bytes; cursor positions are character based.
+        let sql = "SELECT '表' FROM t";
+        let from_byte = sql.find("FROM").unwrap();
+        let cursor = sql[..from_byte].chars().count() as u32 + 1;
+        let position = SqlErrorPosition::from_pg_cursor(sql, cursor).unwrap();
+        assert_eq!(position.line, 1);
+        assert_eq!(position.column, 12);
+        assert_eq!(position.offset, 11);
+    }
+
+    #[test]
+    fn cursor_past_end_is_clamped() {
+        let sql = "SELECT";
+        let position = SqlErrorPosition::from_pg_cursor(sql, 999).unwrap();
+        assert_eq!(position.offset, 5);
+        assert_eq!(position.column, 6);
+    }
+
+    #[test]
+    fn zero_cursor_and_empty_sql_are_rejected() {
+        assert!(SqlErrorPosition::from_pg_cursor("SELECT 1", 0).is_none());
+        assert!(SqlErrorPosition::from_pg_cursor("", 1).is_none());
+    }
+
+    #[test]
+    fn marker_round_trips_and_strips() {
+        let mut message = format!("ERROR: relation does not exist{}", encode_marker(15));
+        assert_eq!(take_marker(&mut message), Some(15));
+        assert_eq!(message, "ERROR: relation does not exist");
+
+        let mut without_marker = "ERROR: nope".to_string();
+        assert_eq!(take_marker(&mut without_marker), None);
+        assert_eq!(without_marker, "ERROR: nope");
+    }
+
+    #[test]
+    fn malformed_marker_is_left_untouched() {
+        let text = format!("{SQL_ERROR_POSITION_MARKER}not-a-number");
+        let mut message = text.clone();
+        assert_eq!(take_marker(&mut message), None);
+        assert_eq!(message, text);
+    }
+
+    #[test]
+    fn marker_followed_by_text_is_stripped_and_preserves_the_tail() {
+        let mut message = format!("ERROR: boom{}; rollback failed", encode_marker(7));
+        assert_eq!(take_marker(&mut message), Some(7));
+        assert_eq!(message, "ERROR: boom; rollback failed");
+    }
+
+    #[test]
+    fn take_message_position_strips_marker_and_resolves_position() {
+        let sql = "SELECT 1\nFROM missing";
+        let cursor = sql.find("missing").unwrap() as u32 + 1;
+        let raw = format!("ERROR: relation \"missing\" does not exist{}", encode_marker(cursor));
+        let (message, position) = take_message_position(&raw, sql);
+        assert_eq!(message, "ERROR: relation \"missing\" does not exist");
+        let position = position.unwrap();
+        assert_eq!(position.line, 2);
+        assert_eq!(position.column, 6);
+    }
+
+    #[test]
+    fn take_message_position_still_strips_when_the_cursor_is_unusable() {
+        // cursor 0 cannot be resolved, but the marker must not leak.
+        let raw = format!("ERROR: boom{}", encode_marker(0));
+        let (message, position) = take_message_position(&raw, "SELECT 1");
+        assert_eq!(message, "ERROR: boom");
+        assert!(position.is_none());
+
+        // Empty statement: nothing to map onto.
+        let raw = format!("ERROR: boom{}", encode_marker(5));
+        let (message, position) = take_message_position(&raw, "");
+        assert_eq!(message, "ERROR: boom");
+        assert!(position.is_none());
+    }
+
+    #[test]
+    fn take_message_position_without_marker_is_identity() {
+        let (message, position) = take_message_position("ERROR: x", "SELECT 1");
+        assert_eq!(message, "ERROR: x");
+        assert!(position.is_none());
+    }
+
+    #[test]
+    fn multiple_markers_are_all_stripped_and_never_resolved() {
+        // A user-statement error merged with an infrastructure error carries two
+        // cursors; the position cannot be attributed to a single statement.
+        let raw =
+            format!("ERROR: relation missing does not exist{}; cleanup failed{}", encode_marker(15), encode_marker(3));
+        let (message, position) = take_message_position(&raw, "SELECT * FROM missing");
+        assert_eq!(message, "ERROR: relation missing does not exist; cleanup failed");
+        assert!(position.is_none());
+        assert_eq!(strip_marker(&raw), "ERROR: relation missing does not exist; cleanup failed");
+    }
+
+    #[test]
+    fn strip_marker_without_marker_is_identity() {
+        assert_eq!(strip_marker("ERROR: x"), "ERROR: x");
+    }
+}
diff --git a/crates/dbx-core/tests/live_postgres_error_position.rs b/crates/dbx-core/tests/live_postgres_error_position.rs
new file mode 100644
index 0000000000..eb574c4f29
--- /dev/null
+++ b/crates/dbx-core/tests/live_postgres_error_position.rs
@@ -0,0 +1,233 @@
+#![recursion_limit = "256"]
+//! Live PostgreSQL verification of the SQL error-position plumbing.
+//!
+//! Requires a connectable PostgreSQL-family server pointed at by
+//! `DBX_LIVE_POSTGRES_*` (same variables as the other `live_postgres_*` tests).
+//! `DBX_LIVE_PG_FAMILY=opengauss` switches the full-funnel test to an openGauss
+//! connection config, to prove the position is not gated on `DatabaseType::Postgres`.
+//!
+//! ```text
+//! DBX_LIVE_POSTGRES_HOST=... DBX_LIVE_POSTGRES_PORT=... \
+//! DBX_LIVE_POSTGRES_USER=... DBX_LIVE_POSTGRES_PASSWORD=... \
+//! DBX_LIVE_POSTGRES_DATABASE=... \
+//! cargo test -p dbx-core --no-default-features --test live_postgres_error_position -- --ignored
+//! ```
+
+use std::time::Duration;
+
+use dbx_core::connection::AppState;
+use dbx_core::db::postgres;
+use dbx_core::models::connection::{ConnectionConfig, DatabaseType};
+use dbx_core::query::{execute_multi_core_with_options_for_client_and_progress_typed, QueryExecutionOptions};
+use dbx_core::sql_error_position::{encode_marker, take_message_position, SqlErrorPosition, SQL_ERROR_POSITION_MARKER};
+use dbx_core::storage::Storage;
+
+fn live_env() -> (String, u16, String, String, String) {
+    let host = std::env::var("DBX_LIVE_POSTGRES_HOST").unwrap_or_else(|_| "127.0.0.1".to_string());
+    let port = std::env::var("DBX_LIVE_POSTGRES_PORT").ok().and_then(|value| value.parse().ok()).unwrap_or(5432);
+    let user = std::env::var("DBX_LIVE_POSTGRES_USER").unwrap_or_else(|_| "postgres".to_string());
+    let password = std::env::var("DBX_LIVE_POSTGRES_PASSWORD").unwrap_or_default();
+    let database = std::env::var("DBX_LIVE_POSTGRES_DATABASE").unwrap_or_else(|_| "postgres".to_string());
+    (host, port, user, password, database)
+}
+
+fn postgres_url() -> String {
+    let (host, port, user, password, database) = live_env();
+    format!("postgres://{}:{}@{host}:{port}/{database}", encode_userinfo(&user), encode_userinfo(&password))
+}
+
+/// Percent-encode the URL userinfo so secrets containing `@`/`:` survive parsing.
+fn encode_userinfo(value: &str) -> String {
+    let mut encoded = String::with_capacity(value.len());
+    for character in value.chars() {
+        match character {
+            '%' => encoded.push_str("%25"),
+            '@' => encoded.push_str("%40"),
+            ':' => encoded.push_str("%3A"),
+            '/' => encoded.push_str("%2F"),
+            other => encoded.push(other),
+        }
+    }
+    encoded
+}
+
+fn live_db_type() -> DatabaseType {
+    if std::env::var("DBX_LIVE_PG_FAMILY").is_ok_and(|value| value.eq_ignore_ascii_case("opengauss")) {
+        DatabaseType::OpenGauss
+    } else {
+        DatabaseType::Postgres
+    }
+}
+
+fn expected_position(sql: &str, offending: &str) -> SqlErrorPosition {
+    let byte_index = sql.find(offending).unwrap();
+    let offset = sql[..byte_index].chars().count() as u32;
+    let line = sql[..byte_index].matches('\n').count() as u32 + 1;
+    let line_start = sql[..byte_index].rfind('\n').map_or(0, |index| index + 1);
+    let column = sql[line_start..byte_index].chars().count() as u32 + 1;
+    SqlErrorPosition { line, column, offset }
+}
+
+#[tokio::test]
+#[ignore = "requires DBX_LIVE_POSTGRES_* pointing at a PostgreSQL-family database"]
+async fn live_pg_error_positions_resolve_against_the_executed_statement() {
+    let pool = postgres::connect(&postgres_url(), Duration::from_secs(10)).await.expect("connect");
+
+    // (sql, offending token). The first case is the exact shape DBX sends for the
+    // user's `select  * from no_such_table` after pagination appends LIMIT.
+    let cases = [
+        ("select  * from no_such_table LIMIT 100", "no_such_table"),
+        ("SELECT *\nFROM no_such_table", "no_such_table"),
+        ("SELECT no_such_col FROM (SELECT 1 AS x) AS t", "no_such_col"),
+        ("INSERT INTO no_such_table VALUES (1)", "no_such_table"),
+    ];
+
+    for (sql, offending) in cases {
+        let message = postgres::execute_query(&pool, sql).await.expect_err("statement must fail");
+        assert!(message.contains(SQL_ERROR_POSITION_MARKER), "driver error must carry the marker: {message}");
+
+        let (cleaned, position) = take_message_position(&message, sql);
+        assert!(!cleaned.contains(SQL_ERROR_POSITION_MARKER), "marker must be stripped: {cleaned}");
+        assert_eq!(position, Some(expected_position(sql, offending)), "position for `{sql}`");
+    }
+
+    let syntax_sql = "SELECT * FROMM no_such_table";
+    let message = postgres::execute_query(&pool, syntax_sql).await.expect_err("syntax error");
+    let (_, position) = take_message_position(&message, syntax_sql);
+    assert_eq!(position, Some(expected_position(syntax_sql, "FROMM")), "syntax error should point at FROMM");
+
+    pool.close();
+}
+
+/// Full backend funnel: AppState + connection config → `execute_multi_core` →
+/// `BackendError`. This is where the old `pool_db_type == Postgres` gate lived, so
+/// running it with `DBX_LIVE_PG_FAMILY=opengauss` guards the regression.
+#[tokio::test]
+#[ignore = "requires DBX_LIVE_POSTGRES_* pointing at a PostgreSQL-family database"]
+async fn live_pg_multi_core_reports_error_position_in_the_backend_envelope() {
+    let (host, port, user, password, database) = live_env();
+    let db_type = live_db_type();
+
+    let dir = std::env::temp_dir().join(format!("dbx-live-pg-position-{}", uuid::Uuid::new_v4().simple()));
+    std::fs::create_dir_all(&dir).unwrap();
+    let storage = Storage::open(&dir.join("storage.db")).await.unwrap();
+    let state = AppState::new(storage);
+    let connection_id = "live-pg-position";
+    state.configs.write().await.insert(
+        connection_id.to_string(),
+        live_connection_config(connection_id, db_type, &host, port, &user, &password, &database),
+    );
+
+    let sql = "select  * from no_such_table LIMIT 100";
+    let result = execute_multi_core_with_options_for_client_and_progress_typed(
+        &state,
+        connection_id,
+        &database,
+        sql,
+        None,
+        None,
+        QueryExecutionOptions { timeout_secs: Some(30), ..Default::default() },
+        None,
+    )
+    .await;
+
+    let backend_error = result.expect_err("single-statement failure must surface as an error").into_backend_error();
+    assert_eq!(backend_error.code(), "DBX-JDBC-4001");
+    assert_eq!(
+        backend_error.error_position(),
+        Some(expected_position(sql, "no_such_table")),
+        "db_type={db_type:?} detail={:?}",
+        backend_error.detail()
+    );
+    let detail = backend_error.detail().unwrap_or_default();
+    assert!(!detail.contains(SQL_ERROR_POSITION_MARKER), "detail must not leak the marker: {detail}");
+    assert!(detail.contains("no_such_table"), "detail should keep the native message: {detail}");
+
+    let _ = std::fs::remove_dir_all(&dir);
+}
+
+/// A second case proving the multi-marker guard: a marker-containing error that
+/// gets another marker merged in must not resolve to a wrong position.
+#[test]
+fn marker_guard_rejects_ambiguous_merged_errors() {
+    let sql = "SELECT 1";
+    let raw = format!("ERROR: boom{}{}", encode_marker(1), encode_marker(50));
+    let (cleaned, position) = take_message_position(&raw, sql);
+    assert!(position.is_none());
+    assert_eq!(cleaned, "ERROR: boom");
+}
+
+fn live_connection_config(
+    id: &str,
+    db_type: DatabaseType,
+    host: &str,
+    port: u16,
+    user: &str,
+    password: &str,
+    database: &str,
+) -> ConnectionConfig {
+    ConnectionConfig {
+        docs_notes_path: None,
+        id: id.to_string(),
+        name: id.to_string(),
+        note: String::new(),
+        db_type,
+        driver_profile: None,
+        driver_label: None,
+        url_params: None,
+        agent_java_options: Vec::new(),
+        host: host.to_string(),
+        port,
+        username: user.to_string(),
+        password: password.to_string(),
+        database: Some(database.to_string()),
+        default_schema: None,
+        visible_databases: None,
+        visible_database_patterns: None,
+        visible_schemas: None,
+        attached_databases: Vec::new(),
+        init_script: None,
+        color: None,
+        transport_layers: Vec::new(),
+        connect_timeout_secs: 10,
+        query_timeout_secs: 30,
+        idle_timeout_secs: 60,
+        keepalive_interval_secs: 0,
+        ssl: false,
+        ca_cert_path: String::new(),
+        client_cert_path: String::new(),
+        client_key_path: String::new(),
+        sysdba: false,
+        oracle_connection_type: None,
+        connection_string: None,
+        redis_connection_mode: None,
+        redis_sentinel_master: String::new(),
+        redis_sentinel_nodes: String::new(),
+        redis_sentinel_username: String::new(),
+        redis_sentinel_password: String::new(),
+        redis_sentinel_tls: false,
+        redis_cluster_nodes: String::new(),
+        redis_key_separator: dbx_core::models::connection::default_redis_key_separator(),
+        redis_scan_page_size: None,
+        redis_database_aliases: Default::default(),
+        redis_key_templates: Vec::new(),
+        redis_key_grouping: None,
+        etcd_endpoints: String::new(),
+        gbase_server: String::new(),
+        informix_server: String::new(),
+        external_config: None,
+        plugin_id: None,
+        plugin_connection_provider: None,
+        plugin_connection_type: None,
+        connection_secrets: Default::default(),
+        jdbc_driver_class: None,
+        jdbc_driver_paths: Vec::new(),
+        one_time: false,
+        save_password: true,
+        read_only: false,
+        is_production: false,
+        production_databases: vec![],
+        show_system_schemas: false,
+        database_info: None,
+    }
+}
diff --git a/docs/backend-error-handling.md b/docs/backend-error-handling.md
index b99dbd4a0f..7416b288e7 100644
--- a/docs/backend-error-handling.md
+++ b/docs/backend-error-handling.md
@@ -44,6 +44,7 @@ Rust `BackendError` 的字段由 catalog 构造，字段定义如下（JSON 使
   "origin": { "subsystem": "database", "adapter": "native" },
   "operationOutcome": "unknown",
   "detail": "relation missing_table does not exist",
+  "errorPosition": { "line": 1, "column": 15, "offset": 14 },
   "diagnostics": {
     "category": "sql",
     "stage": "execute",
@@ -61,6 +62,7 @@ Rust `BackendError` 的字段由 catalog 构造，字段定义如下（JSON 使
 - `source` 是 v1 兼容字段，表示旧的错误来源；新代码使用 `origin.subsystem` 和 `origin.adapter` 描述数据库、隧道、插件、AI、消息队列等子系统。客户端不能因为未知的 source/origin 值而丢弃整个 envelope。
 - `origin` 是可扩展元数据，至少包含 `subsystem` 和 `adapter`，可选 `driver`；它不参与错误分类、恢复或重试决策。
 - `diagnostics.adapterCode` 是适配器协议提供的可选错误码（例如 DuckDB worker 的 `duckdb_execute_failed`），仅用于诊断展示，不替代稳定的 DBX `code`。
+- `errorPosition` 是适配器提供的可选出错位置，只有能给出真实游标的驱动才会填充（目前为原生 PostgreSQL）。`line`/`column` 为 1-based、按 Unicode 码点计数，`offset` 为语句内 0-based 码点下标，均相对**实际下发的语句文本**；它不参与错误分类、重试或恢复。客户端只应在能证明该语句仍映射回当前编辑器内容时用于定位，否则忽略该字段。
 - `operationOutcome` 只能是 `not_started` 或 `unknown`。结果未知时不能自动重放用户操作。
 - `messageParams` 只能包含 catalog 声明的 string、number、boolean 标量，不得携带 SQL、URL、凭据或任意对象。
 - Rust 字段保持私有，新增错误必须通过 catalog 构造，避免 code、key 和参数声明漂移。
@@ -99,7 +101,7 @@ Rust `BackendError` 的字段由 catalog 构造，字段定义如下（JSON 使
 - DBX 不解析、抽取或改写 SQL payload，也不会主动把执行 SQL 追加到错误；因此 SQL 方言、嵌套括号、引号和业务字面量不会被错误的通用字符串规则破坏。需要内部诊断时应单独记录原始请求，不得把内部日志对象直接复用为公共 envelope。
 - `AgentErrorContext` 中的 `agentSessionId`、重试标记和内部恢复字段不会作为结构化字段进入公共 envelope；`connection` 等非 SQL 类别的驱动错误正文如果包含 Session 或凭据文本，公共 detail 仍会脱敏。
 - Rust 查询执行器生成的查询超时会使用 `DBX-JDBC-2002`（阶段 `execute`）摘要，同时保留超时诊断 detail；它不会作为 `DBX-LEGACY-0001` 展示。
-- PostgreSQL native driver 返回的标准服务端 `ERROR:` 诊断会使用 `DBX-JDBC-4001`（阶段 `execute`）摘要并保留原始 detail；连接、超时、取消和清理错误不使用该分类。
+- PostgreSQL native driver 返回的标准服务端 `ERROR:` 诊断会使用 `DBX-JDBC-4001`（阶段 `execute`）摘要并保留原始 detail；当驱动给出游标位置时，会同时填充结构化的 `errorPosition`（用于前端“点击定位到出错行列”）。位置以可解析后缀在 `db` 层内部传递，并在 `query.rs` 还原为类型化字段；该后缀不会出现在 `detail` 或任何用户可见文本中。连接、超时、取消和清理错误不使用该分类。
 - DuckDB worker 返回的 `Parser Error`、`Catalog Error` 等厂商正文会保留在 `detail`；worker code 会放入 `diagnostics.adapterCode`，并在前端详情前显示。
 - 超时和取消没有服务端 detail 时只返回摘要；`without_detail()` 只有在调用方明确要求隐藏 detail 时才会移除原文。
 
diff --git a/docs/pg-error-position-locate-plan.md b/docs/pg-error-position-locate-plan.md
new file mode 100644
index 0000000000..13ed1b3de2
--- /dev/null
+++ b/docs/pg-error-position-locate-plan.md
@@ -0,0 +1,596 @@
+# PostgreSQL 执行错误「点击定位到行列」开发方案
+
+> 目标：在 PG 连接下执行 SQL 失败后，错误信息区域出现「定位错误」入口，点击后把编辑器光标定位到出错的行/列（并高亮该位置）。
+> 本文先给出代码现状分析，再给出可执行的改造方案与分阶段任务。
+
+---
+
+## 1. 现状分析
+
+### 1.1 错误从 PG 到界面的完整链路
+
+```
+tokio_postgres::Error
+  └─ DbError.position() = ErrorPosition::Original(cursorpos)   ← 位置信息在这里，当前被丢弃
+        │
+        │  crates/dbx-core/src/db/postgres.rs::pg_error_to_string()
+        │  (只取 err.as_db_error().map(ToString::to_string))     ← 只保留文本，未保留 cursorpos
+        ▼
+Result<db::QueryResult, String>            ← db 层统一用 String 承载错误
+        │
+        │  crates/dbx-core/src/query.rs::do_execute_typed() 尾部 .map_err(...)
+        ▼
+QueryExecutionError::{Legacy|Sql}(String)   ← 仍是纯文本
+        │
+        │  QueryExecutionError::into_backend_error()
+        ▼
+BackendError { code, messageKey, detail, diagnostics, ... }   ← 结构化，但无位置
+        │
+        ├─ 单语句/事务：tauri command 返回 Err(BackendError)
+        └─ 多语句：ExecuteMultiResult { execution_error: true, error: BackendError, statement_index }
+        ▼
+前端 queryStore：
+  - 多语句：annotateQueryResultSources() 给每个 result 写 sourceStatement / sourceFrom / sourceTo / statement_index
+  - 单语句异常：toErrorResult() 合成 { columns:["Error"], execution_error:true, error:BackendError }
+        ▼
+DataGrid ErrorBanner（apps/desktop/src/components/grid/DataGrid.vue:11835）
+  └─ #error-actions slot → ContentArea.vue:2032 → QueryErrorActions.vue
+```
+
+### 1.2 关键结论
+
+1. **位置信息在驱动层就已存在**：`tokio_postgres::error::DbError::position()` 返回 `ErrorPosition::Original(u32)`，语义是 **1-based 的字符下标**（不是字节，PG 文档明确规定）。
+2. **当前被丢弃**：`postgres.rs:1482` 的 `pg_error_to_string` 只用 `Display`，而 `DbError` 的 `Display` 实现**不包含** position 字段（见 `tokio-postgres/src/error/mod.rs` 的 `impl fmt::Display for DbError`）。所以前端完全拿不到。
+3. **中间层是 String ABI**：`db::postgres` 到 `query.rs` 之间所有用户查询函数都返回 `Result<_, String>`（`execute_query_with_max_rows_and_cancel` / `execute_postgres_user_query(_with_mode)` / `execute_query_with_max_rows_inner` 等），错误在多个 `?`/`map_err(pg_error_to_string)` 中被反复包装、拼接（如 `merge_postgres_operation_and_rollback_result`）。直接引入类型化错误会牵动整个 `postgres.rs`。
+4. **前端已经具备映射到编辑器位置的能力**：`apps/desktop/src/lib/tabs/tabPresentation.ts:244` 的 `resultSourceRange(editorSql, result, resultIndex, dbType, params)` 能把「某个 result 对应的语句」映射回当前编辑器文档的 `{from,to,sql}`，并且带一致性校验（`editorSql.slice(from,to) === sourceStatement`），stale 时返回 `undefined`。这就是把「语句内行列」换算成「编辑器绝对 offset」的现成入口。
+5. **编辑器已有定位能力**：`QueryEditor.vue` 通过 `defineExpose` 暴露 `focusStatementRange({from,to})`（1105 行）与 `previewStatementRange`，内部用 CodeMirror 的 `EditorView.scrollIntoView` + selection 实现。新增一个「定位到点」的方法即可复用同一套机制。
+6. **UI 入口已经存在**：错误横幅的 action 插槽（`ContentArea.vue:2032` / `:2390`）已经挂了 `QueryErrorActions`；执行摘要（`executionSummaryItems` + `ContentArea.vue:1869`）也已经有「单击预览语句 / 双击聚焦语句」的交互。这两个地方都是本次新增「定位错误」的天然落点。
+7. **后端契约允许加可选字段**：`docs/backend-error-handling.md` 明确「新增可选字段可以保持 v1」，并要求错误对象由 catalog 构造、前后端不因未知可选字段丢弃 envelope。因此给 `BackendError` 增加可选 `errorPosition` 是向后兼容的。
+8. **契约同时要求**：「不得先降级为字符串再重建 envelope」——这条针对的是**错误分类**。位置是驱动事实、不是分类依据，但方案会尽量把它做成类型化字段，字符串只作为跨 `String` ABI 的临时载体，并在第一层知道 SQL 文本的地方立刻还原为类型化字段。
+
+### 1.3 需要动到的文件清单
+
+| 层 | 文件 | 作用 |
+| --- | --- | --- |
+| 驱动 | `crates/dbx-core/src/db/postgres.rs` | 从 `DbError` 提取 cursorpos |
+| 新模块 | `crates/dbx-core/src/sql_error_position.rs`（新增） | 位置类型、行列换算、marker 编解码 |
+| 查询层 | `crates/dbx-core/src/query.rs` | 还原位置、挂到 `QueryExecutionError` |
+| 契约 | `crates/dbx-core/src/backend_error.rs` | `BackendError.errorPosition` 字段与构造器 |
+| 契约文档 | `docs/backend-error-handling.md` | 记录新可选字段 |
+| 前端类型 | `apps/desktop/src/lib/backend/errorUtils.ts` | TS `BackendError.errorPosition` + 校验 |
+| 前端映射 | `apps/desktop/src/lib/sql/errorPosition.ts`（新增） | 语句内行列 → 编辑器 offset |
+| 前端状态 | `apps/desktop/src/stores/queryStore.ts` | 错误结果附带位置（必要时） |
+| 前端 UI | `apps/desktop/src/components/common/QueryErrorActions.vue`、`ContentArea.vue`、`editor/QueryEditor.vue`、`grid/DataGrid.vue`（如做内联标记） | 按钮 + 定位 + 行列展示 |
+| i18n | `apps/desktop/src/i18n/locales/*.ts` | 新增文案 |
+| 测试 | 各处 `#[cfg(test)]` / `apps/desktop/src/**/__tests__` | 单测覆盖 |
+
+---
+
+## 2. 方案总览
+
+```
+PG server cursorpos (字符下标)
+   │  ① 提取
+   ▼
+pg_error_to_string() 追加临时 marker: "\nDBX_SQL_ERROR_POSITION:<cursor>"
+   │  ② 沿既有 String ABI 冒泡（不改各函数签名）
+   ▼
+query.rs::do_execute_typed() 尾部 .map_err：
+   PG 分支解析 marker + 用已执行 SQL 文本换算 line/column/offset
+   → QueryExecutionError::SqlWithPosition { message, position }
+   │  ③ 类型化
+   ▼
+QueryExecutionError::into_backend_error()
+   → BackendError { ..., errorPosition: { line, column, offset } }
+   │  ④ 随 envelope 到前端（单语句 Err / 多语句 result.error 两条路都覆盖）
+   ▼
+前端 QueryErrorActions / ExecutionSummary 显示「行 L 列 C」+「定位」按钮
+   │  ⑤ 点击
+   ▼
+sqlErrorEditorOffset(): resultSourceRange() 得到语句范围 → 语句内行列换算为编辑器 UTF-16 offset
+   ▼
+QueryEditor.focusErrorPosition(offset)：selection + scrollIntoView + 高亮
+```
+
+设计取舍：
+
+- **位置换算放在后端**：后端在 `do_execute_typed` 处同时掌握「原始 SQL 文本」和「cursorpos」，直接算出行列，前端只做「语句范围 → 文档 offset」的平移，避免前端再次处理字符/字节/码点差异。
+- **跨层用 marker**：`db::postgres` 全链路是 `Result<_, String>`，引入类型化错误代价大且风险高。用与仓库既有 `DBX_AGENT_ERROR_DATA`（`agent_driver.rs:385`）同款「结构化后缀 marker」把类型化事实无损穿过 String 边界，并在第一层知道 SQL 的 `query.rs` 立即还原并剥离。marker 是**位置载体**而非分类依据，符合契约边界。
+- **两级安全网**：`BackendError` 的 `detail` 清洗（`bounded_detail` / `bounded_native_detail`）里也剥离 marker，保证元数据/连接等旁路错误即使没走到 PG 分支也不会把 marker 泄漏到界面。
+
+> 备选方案（更「类型化」但改动大）：把 `db::postgres` 用户查询链路（`execute_query_with_max_rows_and_cancel` → `execute_postgres_user_query(_with_mode)` → `execute_query_with_max_rows_inner` 及其等待包装）的返回错误从 `String` 改为 `PostgresQueryError { message, position }`，并给 `String` 提供 `From` 以便内部 `?` 继续工作。优点是彻底无 marker；缺点是触及 `postgres.rs` 多处签名与等待辅助函数。若团队不接受 marker，可切换到该方案，`query.rs` 以上的设计不变。
+
+---
+
+## 3. 后端改造
+
+### 3.1 新模块 `crates/dbx-core/src/sql_error_position.rs`
+
+```rust
+use serde::{Deserialize, Serialize};
+
+/// 跨 String 边界携带 PG cursorpos 的临时后缀。
+pub const SQL_ERROR_POSITION_MARKER: &str = "\nDBX_SQL_ERROR_POSITION:";
+
+/// 相对「实际下发的那条语句文本」的出错位置。
+/// line/column 为 1-based、按 Unicode 码点计数；offset 为 0-based 码点下标。
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct SqlErrorPosition {
+    pub line: u32,
+    pub column: u32,
+    pub offset: u32,
+}
+
+impl SqlErrorPosition {
+    /// `cursor` 为 PostgreSQL 的 1-based 字符下标。
+    pub fn from_pg_cursor(sql: &str, cursor: u32) -> Option<Self> {
+        if cursor == 0 {
+            return None;
+        }
+        let total = sql.chars().count() as u32;
+        // 越界时钳到末尾（"unexpected end of input" 这类错误常见 position == len+1）
+        let target = (cursor - 1).min(total.saturating_sub(1));
+        if total == 0 {
+            return None;
+        }
+        let mut line = 1u32;
+        let mut column = 1u32;
+        for (index, ch) in sql.chars().enumerate() {
+            if index as u32 == target {
+                return Some(Self { line, column, offset: target });
+            }
+            if ch == '\n' {
+                line += 1;
+                column = 1;
+            } else {
+                column += 1;
+            }
+        }
+        None
+    }
+}
+
+pub fn encode_marker(cursor: u32) -> String {
+    format!("{SQL_ERROR_POSITION_MARKER}{cursor}")
+}
+
+/// 从字符串尾部取出 marker 并剥离。返回原始 cursor。
+pub fn take_marker(message: &mut String) -> Option<u32> {
+    let index = message.rfind(SQL_ERROR_POSITION_MARKER)?;
+    let cursor = message[index + SQL_ERROR_POSITION_MARKER.len()..].trim().parse::<u32>().ok()?;
+    message.truncate(index);
+    Some(cursor)
+}
+
+pub fn strip_marker(message: &str) -> String {
+    let mut owned = message.to_string();
+    let _ = take_marker(&mut owned);
+    owned
+}
+
+/// 把一条错误文本（可能带 marker）解析为「清理后的文本 + 已换算位置」。
+pub fn resolve_message(message: &str, executed_sql: &str) -> Option<(String, SqlErrorPosition)> {
+    let mut owned = message.to_string();
+    let cursor = take_marker(&mut owned)?;
+    let position = SqlErrorPosition::from_pg_cursor(executed_sql, cursor)?;
+    Some((owned, position))
+}
+```
+
+> 在 `crates/dbx-core/src/lib.rs` 注册 `pub mod sql_error_position;`（仓库若已有模块清单，按现有顺序追加）。
+
+### 3.2 `db/postgres.rs`：提取 cursorpos
+
+改 `pg_error_to_string`（1482 行）——这是把 tokio 错误变文本的唯一汇聚点：
+
+```rust
+fn pg_error_to_string(err: tokio_postgres::Error) -> String {
+    let Some(db_error) = err.as_db_error() else {
+        return err.to_string();
+    };
+    let mut message = db_error.to_string();
+    if let Some(tokio_postgres::error::ErrorPosition::Original(cursor)) = db_error.position() {
+        message.push_str(&crate::sql_error_position::encode_marker(*cursor));
+    }
+    message
+}
+```
+
+注意：
+
+- `ErrorPosition::Internal { .. }` 表示位置在服务端内部生成的语句里，**不映射**，保持无位置。
+- `pg_db_error_to_string`（1542 行，给 `pg_error_from_sources`/池错误用）**不加 marker**，因为那条路径没有用户 SQL 上下文。
+- marker 只对 PG 生效，其它驱动零影响。
+
+### 3.3 `query.rs`：还原为类型化位置
+
+1) 扩展 `QueryExecutionError`（`query.rs:69`）新增变体：
+
+```rust
+pub enum QueryExecutionError {
+    Agent(AgentCallError),
+    DuckDb { code: String, message: String },
+    Canceled { stage: AgentErrorStage, operation_outcome: AgentOperationOutcome },
+    Timeout(String),
+    Sql(String),
+    /// PG 原生驱动：携带已换算好的出错行列。
+    SqlWithPosition { message: String, position: crate::sql_error_position::SqlErrorPosition },
+    Legacy(String),
+}
+```
+
+2) 补齐所有 match 分支（按现有 `Self::Sql(..)` 处理方式）：
+
+- `into_legacy_string()`（85 行附近）：`Self::SqlWithPosition { message, .. } => message`
+- `into_backend_error()`（90 行附近）：
+  ```rust
+  Self::SqlWithPosition { message, position } =>
+      crate::backend_error::BackendError::from_sql_detail_with_position(&message, position),
+  ```
+- `with_omitted_sql_context()`：保留 position，仅对 message 追加 `SQL_OMITTED_ERROR_CONTEXT`
+- `with_context()`：同上，仅改 message
+- `as_agent_error()`：归入 `None`
+- `Display`：输出 message
+- `query_execution_error_action()` 的 `Sql(message) | Legacy(message)` 分支（1497 行）加 `SqlWithPosition { message, .. }`
+- `classify_query_error()`（2358 行）保持 `other => other` 即可透传
+
+3) 在 `do_execute_typed` 的最终 `.map_err`（2350~2357 行）解析 marker：
+
+```rust
+.map_err(|error| {
+    #[cfg(feature = "duckdb-sidecar")]
+    if let Some(duckdb_error) = typed_duckdb_error {
+        return QueryExecutionError::DuckDb { code: duckdb_error.code, message: duckdb_error.message };
+    }
+    if let Some(agent_error) = typed_agent_error {
+        return QueryExecutionError::Agent(agent_error);
+    }
+    if pool_db_type == Some(DatabaseType::Postgres) {
+        if let Some((message, position)) = crate::sql_error_position::resolve_message(&error, sql) {
+            return QueryExecutionError::SqlWithPosition { message, position };
+        }
+    }
+    QueryExecutionError::Legacy(error)
+})
+```
+
+此处 `sql: &str` 就是该语句实际下发的文本，`pool_db_type` 已在前文计算。**注意**：`execute_sql_statement_with_options_typed(_inner)` 里 `with_omitted_sql_context` 之后还会走 reconnect 重试等分支，位置只在真正执行、且 SQL 未再改写的那次错误上正确；重试后再次执行会重新产生新的 marker，逻辑自洽。
+
+4) `error_query_result(error.clone().into_legacy_string())`（`query.rs:3345` / `3833`）自动拿到清理后的文本，无需改动。
+
+### 3.4 `backend_error.rs`：新增可选字段
+
+```rust
+#[derive(Debug, Clone, PartialEq, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct BackendError {
+    // ...既有字段...
+    #[serde(skip_serializing_if = "Option::is_none")]
+    error_position: Option<crate::sql_error_position::SqlErrorPosition>,
+}
+
+impl BackendError {
+    /// 在既有 SQL 失败 envelope 上附加驱动给出的出错位置（保持 v1）。
+    pub fn from_sql_detail_with_position(
+        message: &str,
+        position: crate::sql_error_position::SqlErrorPosition,
+    ) -> Self {
+        let mut error = Self::from_sql_detail(message);
+        error.error_position = Some(position);
+        error
+    }
+
+    pub fn error_position(&self) -> Option<crate::sql_error_position::SqlErrorPosition> {
+        self.error_position
+    }
+
+    fn new(/* 既有参数 */) -> Self {
+        Self { /* ... */ error_position: None }
+    }
+}
+```
+
+安全网（防止 marker 从旁路泄漏到 detail）：
+
+```rust
+fn bounded_detail(message: &str) -> Option<String> {
+    let message = crate::sql_error_position::strip_marker(message);
+    // ...对 message 走原有逻辑
+}
+fn bounded_native_detail(message: &str) -> Option<String> {
+    let message = crate::sql_error_position::strip_marker(message);
+    // ...原有逻辑
+}
+```
+
+（注意现有函数签名与所有权，改成接收 `&str` 后用局部 `String` 即可。）
+
+### 3.5 契约文档
+
+在 `docs/backend-error-handling.md` 的「公共错误对象」示例与「协议演进」段落补充：新增可选字段 `errorPosition: { line, column, offset }`，仅 PG 原生驱动 SQL 错误存在，为 v1 向后兼容可选字段；`offset` 为语句内 0-based 码点下标，`line/column` 为 1-based 码点计数。
+
+---
+
+## 4. 前端改造
+
+### 4.1 类型与校验（`lib/backend/errorUtils.ts`）
+
+```ts
+export interface SqlErrorPosition {
+  line: number;
+  column: number;
+  offset: number;
+}
+
+export interface BackendError {
+  // ...既有字段...
+  /** PostgreSQL 原生驱动给出的出错位置（相对该语句文本）。 */
+  errorPosition?: SqlErrorPosition;
+}
+```
+
+在 `isBackendError` 中对 `errorPosition` 做形状校验（三个字段均为有限非负整数，`line/column >= 1`），不合法时忽略整个字段但不丢弃 envelope（与既有「未知可选字段」策略一致）。
+
+### 4.2 行列 → 编辑器 offset（新增 `lib/sql/errorPosition.ts`）
+
+```ts
+import { resultSourceRange } from "@/lib/tabs/tabPresentation";
+import type { QueryResult, DatabaseType } from "@/types/database";
+import type { SqlParameterOptions } from "@/lib/sql/sqlParameters";
+
+export interface EditorErrorPosition {
+  offset: number;
+  line: number;
+  column: number;
+}
+
+/**
+ * 把 result.error.errorPosition（语句内行列）换算为当前编辑器文档的 UTF-16 offset。
+ * 只有在 resultSourceRange 能证明该 result 仍对应编辑器里同一段语句时才返回。
+ */
+export function sqlErrorEditorOffset(options: {
+  editorSql: string;
+  result: QueryResult | undefined;
+  resultIndex?: number;
+  databaseType?: DatabaseType;
+  parameterOptions?: SqlParameterOptions;
+}): EditorErrorPosition | undefined {
+  const position = options.result?.error?.errorPosition;
+  if (!position) return undefined;
+  const range = resultSourceRange(
+    options.editorSql,
+    options.result,
+    options.resultIndex,
+    options.databaseType,
+    options.parameterOptions,
+  );
+  if (!range) return undefined;
+
+  // 目标：range.sql 内第 position.line 行、第 position.column 列（均 1-based，按码点）
+  const chars = Array.from(range.sql);
+  let line = 1;
+  let lineStart = 0;
+  let index = 0;
+  while (index < chars.length && line < position.line) {
+    if (chars[index] === "\n") {
+      line += 1;
+      lineStart = index + 1;
+    }
+    index += 1;
+  }
+  if (line !== position.line) return undefined; // 行号超出语句
+
+  // 该行内前进 column-1 个码点，遇到行尾或换行则钳制
+  let columnOffset = 0;
+  while (columnOffset < position.column - 1 && lineStart + columnOffset < chars.length) {
+    if (chars[lineStart + columnOffset] === "\n") break;
+    columnOffset += 1;
+  }
+  const charIndex = lineStart + columnOffset;
+
+  // 码点下标 → range.sql 内 UTF-16 下标
+  const utf16Offset = chars.slice(0, charIndex).join("").length;
+  return { offset: range.from + utf16Offset, line: position.line, column: position.column };
+}
+```
+
+> 优先用 `line/column` 而非 `offset`，因为二者都是「码点计数」，语义一致；`offset` 作为兜底/测试信号。
+
+### 4.3 编辑器定位能力（`components/editor/QueryEditor.vue`）
+
+在 `focusStatementRange`（1105 行）旁新增并加入 `defineExpose`（7542 行）：
+
+```ts
+function focusErrorPosition(offset: number) {
+  const currentView = view.value;
+  if (!currentView || !editorViewModule) return;
+  const pos = Math.max(0, Math.min(offset, currentView.state.doc.length));
+  currentView.dispatch({
+    selection: { anchor: pos },
+    effects: [editorViewModule.EditorView.scrollIntoView(pos, { y: "center" })],
+  });
+  currentView.focus();
+}
+```
+
+可选增强（二选一或都做）：
+
+- 用一次性 decoration 在 `pos` 处画一个短暂的错误下划线/闪烁光标（复用已有 `cm-sql-error` 样式与 `Decoration` 机制，5897 行附近）。
+- 在 `pos` 处选中一个「词」（向两侧扫描标识符边界），让出错 token 更醒目。
+
+### 4.4 UI 入口
+
+**A. 错误横幅（主入口，符合「点击错误信息定位」）**
+
+`QueryErrorActions.vue` 增加 props/emit 与按钮：
+
+```ts
+const props = defineProps<{ errorMessage: string; backendError?: BackendError; connectionId?: string; errorPosition?: { line: number; column: number } }>();
+const emit = defineEmits<{
+  /* 既有 */
+  locateError: [];
+}>();
+const showLocate = computed(() => !!props.errorPosition);
+```
+
+```vue
+<Button v-if="showLocate" variant="outline" size="sm" class="h-7 gap-1.5 px-2.5 text-xs" @click="emit('locateError')">
+  <LocateFixed class="h-3.5 w-3.5" />
+  {{ t("editor.locateError", { line: errorPosition!.line, column: errorPosition!.column }) }}
+</Button>
+```
+
+`ContentArea.vue` 两处 `#error-actions`（2032 / 2390 行）传入 `:error-position="activeTab.result?.error?.errorPosition"` 并绑定 `@locate-error="locateActiveResultError"`：
+
+```ts
+function locateActiveResultError() {
+  const result = props.activeTab.result;
+  const mapped = sqlErrorEditorOffset({
+    editorSql: props.activeTab.sql,
+    result,
+    resultIndex: props.activeTab.activeResultIndex,
+    databaseType: activeEffectiveDatabaseType.value,
+    parameterOptions: activeSqlStatementParameterOptions.value,
+  });
+  if (!mapped) {
+    toast(t("editor.errorPositionUnavailable"), 3000);
+    return;
+  }
+  if (queryEditorRef.value) queryEditorRef.value.focusErrorPosition(mapped.offset);
+  else emit("focusErrorPosition", props.activeTab.id, mapped.offset); // 多窗口/分离 tab 兼容
+}
+```
+
+**B. 执行摘要（多语句场景体验更好）**
+
+- `executionSummaryItems`（`tabPresentation.ts:419`）的 `ExecutionSummaryItem` 增加 `errorPosition?`，多语句分支直接从 `result.error?.errorPosition` 取。
+- `ContentArea.vue` 摘要行的错误文本后追加「行 L 列 C」小标签；`focusExecutionSummaryItem` 改为优先使用 `sqlErrorEditorOffset`（有位置就精确定位，否则退回整条语句 `focusStatementRange`）。
+
+**C. DataGrid 内联提示（可选）**
+
+如需「点击错误信息本体」而非按钮：在 `DataGrid.vue:11835` 的 `ErrorBanner` 上对 message 绑定点击，emit 一个新事件透传到 `ContentArea` 的同一处理函数。建议保留按钮作为主要交互，避免与文本选择冲突。
+
+### 4.5 i18n
+
+在 `i18n/locales/en.ts` 与 `zh-CN.ts`（其余 locale 走 fallback）新增：
+
+```ts
+editor: {
+  locateError: "Locate error (line {line}, col {column})", // zh: 定位错误（第 {line} 行，第 {column} 列）
+  errorPositionUnavailable: "The error position no longer matches the editor content", // zh: 错误位置与当前编辑器内容不一致，无法定位
+}
+executionSummary: {
+  lineColumn: "line {line}, col {column}", // zh: 第 {line} 行，第 {column} 列
+}
+```
+
+---
+
+## 5. 分阶段任务清单
+
+### Phase 1 — 后端位置提取与透传（不影响 UI）
+
+- [ ] 新增 `crates/dbx-core/src/sql_error_position.rs` 并在 `lib.rs` 注册；写 `from_pg_cursor` / marker 的单测（多行、`\r\n`、含 emoji、越界钳制）。
+- [ ] `postgres.rs::pg_error_to_string` 追加 marker（仅 `ErrorPosition::Original`）。
+- [ ] `backend_error.rs`：加 `error_position` 字段、`from_sql_detail_with_position`、`error_position()`，`new()` 补默认；在 `bounded_detail`/`bounded_native_detail` 内 `strip_marker`。
+- [ ] `query.rs`：新增 `QueryExecutionError::SqlWithPosition`，补齐所有 match 分支，在 `do_execute_typed` 尾部 PG 分支解析。
+- [ ] Rust 测试：序列化 `errorPosition`（camelCase）；`into_backend_error()` 产出正确 position；`into_legacy_string()` 不含 marker；`SqlWithPosition` 不被 `classify_query_error` 降级。
+
+### Phase 2 — 前端类型与映射
+
+- [ ] `errorUtils.ts` 增加 `SqlErrorPosition` 与 `errorPosition?`，扩展 `isBackendError` 校验。
+- [ ] 新增 `lib/sql/errorPosition.ts` + vitest：用带 `sourceFrom/sourceTo/sourceStatement` 的假 result 验证多行/非 BMP 字符/行超界/stale 返回 `undefined`。
+- [ ] 同步 `lib/backend/http.ts`、`lib/backend/tauri.ts` 的错误规范化路径（复用 `normalizeBackendError` 应无需改，确认即可）。
+
+### Phase 3 — UI 与编辑器定位
+
+- [ ] `QueryErrorActions.vue` 增加 `errorPosition` prop、`locateError` emit 与按钮；`__tests__/QueryErrorActions.spec.ts` 补用例。
+- [ ] `QueryEditor.vue` 增加 `focusErrorPosition(offset)` 并 `defineExpose`；`ContentArea.vue` 接线 + toast 兜底。
+- [ ] `tabPresentation.ts` 的 `ExecutionSummaryItem` 增加 `errorPosition`；`ExecutionSummary` 行显示行列并支持精确定位。
+- [ ] i18n 文案（en / zh-CN）。
+- [ ] 手工验证：`SELECT * FROM no_such_table;`（表不存在）、`SELECT FROMM t;`（语法错误）、多语句中第 2 条报错、光标定位与高亮。
+
+### Phase 4 — 文档与收尾
+
+- [ ] 更新 `docs/backend-error-handling.md`。
+- [ ] 跑提交前检查（见第 7 节）。
+
+---
+
+## 6. 边界、风险与对策
+
+| 风险 | 说明 | 对策 |
+| --- | --- | --- |
+| **SQL 被前端改写** | 分页包装、排序、只读事务、schema 限定等会在下发前改写 SQL，PG 的 cursorpos 相对改写后的文本，映射到用户原文会偏移 | 位置只在「result 仍能通过 `resultSourceRange` 证明对应当前编辑器同一段语句」时启用；仍可能因包装漂移时，回退为仅展示行列、禁用定位（Phase 3 的 `undefined` 分支）。后续可在前端记录 `sqlToExecute === queryBaseSql` 标志，仅在该成立时启用 |
+| **前后端语句切分差异** | 后端 `split_sql_statements` 与前端 `splitSqlStatementRanges` 对前导注释/空白/分号处理可能不同 | 加对照测试（同一批脚本）；前端已有 `submittedStatement.sql === sourceStatement` 校验，边界不符时不定位 |
+| **PG cursorpos 语义** | 1-based、按字符（码点）而非字节 | 全部换算按 `chars()`/`Array.from` 码点进行；单测覆盖多字节与 emoji |
+| **agent/JDBC PG 无位置** | JDBC 路径错误来自 `AgentCallError`，结构化上下文里没有 position | 明确 Phase 1 只覆盖 tokio-postgres 原生驱动；JDBC 需在 Agent Protocol 扩展字段，另开阶段 |
+| **字符串 marker 泄漏到 UI** | 旁路错误（元数据/连接）可能带 marker | `bounded_detail`/`bounded_native_detail` 统一剥离 + `into_legacy_string` 返回已清理文本；补「不含 marker」单测 |
+| **契约兼容** | `BackendError` 新增字段 | 可选字段保持 v1；前端 `isBackendError` 对未知/非法可选字段宽容处理 |
+| **大小写/换行** | `\r\n` 的行列计算 | `from_pg_cursor` 只以 `\n` 分行，`\r` 计入列；前端按同一规则处理，保持一致 |
+
+---
+
+## 7. 测试与验收
+
+**Rust 单测**
+
+```text
+cargo test -j 1 -p dbx-core --no-default-features --lib sql_error_position::tests
+cargo test -j 1 -p dbx-core --no-default-features --lib backend_error::tests
+cargo test -j 1 -p dbx-core --no-default-features --lib query::tests  # QueryExecutionError 分支
+```
+
+**前端**
+
+```text
+pnpm vitest run apps/desktop/src/lib/__tests__/sql/errorPosition.spec.ts
+pnpm vitest run apps/desktop/src/components/common/__tests__/QueryErrorActions.spec.ts
+pnpm vitest run apps/desktop/src/i18n/__tests__/backendErrors.spec.ts
+pnpm typecheck
+```
+
+**手工验收（PG 连接）**
+
+1. `SELECT * FROM no_such_table;` → 错误横幅出现「定位错误（第 1 行，第 15 列）」→ 点击后光标落在 `no_such_table` 起首。
+2. 多行脚本第 3 条报错 → 执行摘要该行显示行列，点击精确跳转；错误横幅定位到同一条语句。
+3. 执行后手动改动编辑器使语句不再匹配 → 点击定位给出「位置不可用」提示，不误跳。
+4. 非 PG 连接（MySQL/SQLite）错误 → 无定位入口，行为不变。
+
+**完成标准**
+
+- PG 原生驱动的 SQL 错误（语法错误、对象不存在等）在单语句与多语句两条路径都能拿到 `errorPosition` 并正确定位。
+- 其它驱动与既有错误展示零回归（现有 `BackendError` / `translateBackendError` 测试全绿）。
+- 契约文档更新；`docs/backend-error-handling.md` 的提交前检查全过。
+
+---
+
+## 8. 工作量估算
+
+| 阶段 | 内容 | 估算 |
+| --- | --- | --- |
+| Phase 1 | 后端位置提取 + 类型化 + 透传 + 单测 | 0.5–1 天 |
+| Phase 2 | 前端类型 + 映射函数 + 单测 | 0.5 天 |
+| Phase 3 | UI 按钮 + 编辑器定位 + 摘要 + i18n + 手工验证 | 1 天 |
+| Phase 4 | 文档、回归、提测 | 0.5 天 |
+| 合计 | | **约 2.5–3 天** |
+
+---
+
+## 9. 一句话总结
+
+PG 的出错行列一直存在于 `DbError::position()`，只是被 `pg_error_to_string` 丢弃；本方案在驱动层提取 cursorpos，用轻量 marker 穿过既有 `String` 错误 ABI，在 `query.rs` 还原为类型化的 `BackendError.errorPosition`，前端借助已有的 `resultSourceRange` 把「语句内行列」换算成编辑器 offset，并在错误横幅/执行摘要上提供一键定位。整体对现有架构侵入小、对非 PG 驱动零影响。
+
+## 10. 实现补充：下发语句漂移的处理（已落地）
+
+「位置相对实际下发语句」在本方案实现后暴露出一个高频问题：DBX 常在下发前改写语句（追加 `LIMIT/OFFSET`、用 `SELECT * FROM (…)` 包裹分页、为可编辑查询注入隐藏主键列），导致后端位置与用户原文对不上，定位会失败或偏移。已在前端增加一层投影，无需改动后端协议：
+
+1. `annotateQueryResultSources` 额外接收本次实际下发的 SQL（`sqlToExecute`），当某个 result 的语句文本与 `sourceStatement` 不同时，把实际下发的语句文本记录到 `QueryResult.executedStatement`（仅在前端内部使用）。
+2. `sqlErrorEditorOffset` 先把后端 `line/column` 解析到 `executedStatement`（位置本就相对它），再用 `mapExecutedOffsetToSource` 投影回 `sourceStatement`：
+   - 直接子串匹配 → 精确处理「追加子句」与「子查询包裹」；
+   - 前缀对齐 + 剩余文本重定位 → 处理「在投影中注入隐藏列」；
+   - 最后退回「首个/末个差异之间的单一变更区间」对齐。
+3. 行/列越界时钳制而非报「不可用」，因此只要还存在该语句的源码范围，点击定位总能落到句式内的合理位置；只有编辑器内容与结果语句确实不一致（stale）时才提示无法定位。
+
+新增单测覆盖：追加 `LIMIT`、分页包裹、注入隐藏列、多行语句、软字符（emoji）列宽换算与越界钳制。