diff --git a/frontend/src/components/QueryEditor.external-sql-save.test.tsx b/frontend/src/components/QueryEditor.external-sql-save.test.tsx
index 2570da8..c580dc4 100644
--- a/frontend/src/components/QueryEditor.external-sql-save.test.tsx
+++ b/frontend/src/components/QueryEditor.external-sql-save.test.tsx
@@ -5541,6 +5541,47 @@ describe('QueryEditor external SQL save', () => {
     renderer?.unmount();
   });
 
+  it('qualifies OceanBase Oracle read-only queries with the selected schema instead of the login user', async () => {
+    storeState.connections[0].config.type = 'oceanbase';
+    (storeState.connections[0].config as any).oceanBaseProtocol = 'oracle';
+    storeState.connections[0].config.user = 'SBDEVREAD';
+    storeState.connections[0].config.database = 'ORCLPDB1';
+    (storeState.connections[0].config as any).readOnly = true;
+    backendApp.DBGetTables.mockResolvedValueOnce({
+      success: true,
+      data: [{ Table: 'SBDEV.PERSON_INFO' }],
+    });
+    backendApp.DBQueryMulti.mockResolvedValueOnce({
+      success: true,
+      data: [{ columns: ['ZJJHM'], rows: [{ ZJJHM: '' }] }],
+    });
+
+    let renderer!: ReactTestRenderer;
+    await act(async () => {
+      renderer = create(<QueryEditor tab={createTab({ dbName: 'SBDEV', query: "select * from person_info where zjjhm=''" })} />);
+    });
+
+    await act(async () => {
+      await findButton(renderer!, '运行').props.onClick();
+    });
+    await act(async () => {
+      await Promise.resolve();
+      await Promise.resolve();
+    });
+
+    const executedSql = String(backendApp.DBQueryMulti.mock.calls[0][2]);
+    expect(backendApp.DBGetTables).toHaveBeenCalledWith(expect.anything(), 'SBDEV');
+    expect(backendApp.DBGetColumns).not.toHaveBeenCalled();
+    expect(executedSql).toMatch(/from\s+"SBDEV"\."PERSON_INFO"\s+where\s+zjjhm=''/i);
+    expect(executedSql).not.toContain('SBDEVREAD.PERSON_INFO');
+    expect(dataGridState.latestProps?.readOnly).toBe(true);
+    expect(storeState.addSqlLog).toHaveBeenCalledWith(expect.objectContaining({
+      sql: "select * from person_info where zjjhm=''",
+      status: 'success',
+    }));
+    renderer?.unmount();
+  });
+
   it('keeps Oracle anonymous PL/SQL blocks intact when running from the editor', async () => {
     storeState.connections[0].config.type = 'oracle';
     storeState.connections[0].config.database = 'ORCLPDB1';
diff --git a/frontend/src/components/QueryEditor.tsx b/frontend/src/components/QueryEditor.tsx
index adb22c9..f34d737 100644
--- a/frontend/src/components/QueryEditor.tsx
+++ b/frontend/src/components/QueryEditor.tsx
@@ -109,6 +109,7 @@ import {
     resolveNextResultSetIndex,
     resolveOracleExactCaseTableReference,
     resolveOracleLikeDefaultSchemaName,
+    resolveOracleLikeExecutionSchemaName,
     resolveQueryEditorFormatterLanguage,
     resolveQueryEditorHoverTarget,
     resolveQueryEditorNavigationDecorations,
@@ -3353,6 +3354,13 @@ const QueryEditor: React.FC<{ tab: TabData; isActive?: boolean }> = ({ tab, isAc
             const defaultOracleSchema = isOracleLikeDialect(normalizedDbType)
                 ? resolveOracleLikeDefaultSchemaName(config)
                 : '';
+            const oracleExecutionSchema = isOracleLikeDialect(normalizedDbType)
+                ? resolveOracleLikeExecutionSchemaName(config, currentDb)
+                : '';
+            const shouldQualifyOracleUnqualifiedTables = Boolean(
+                oracleExecutionSchema
+                && oracleExecutionSchema.toLowerCase() !== String(defaultOracleSchema || '').trim().toLowerCase(),
+            );
             const oracleTableCache = new Map<string, CompletionTableMeta[]>();
             const getOracleTablesForDb = async (dbName: string): Promise<CompletionTableMeta[]> => {
                 const normalizedDbName = String(dbName || '').trim();
@@ -3409,12 +3417,14 @@ const QueryEditor: React.FC<{ tab: TabData; isActive?: boolean }> = ({ tab, isAc
                         const leadingSegments = splitQueryIdentifierPathSegments(leadingTable.tableText);
                         const oracleLookupDbName = String(
                             (leadingSegments.length >= 2 ? leadingSegments[0]?.value : '')
-                            || defaultOracleSchema
+                            || oracleExecutionSchema
                             || currentDb
                             || '',
                         ).trim();
                         const oracleTables = oracleLookupDbName ? await getOracleTablesForDb(oracleLookupDbName) : [];
-                        const exactQualifiedTable = resolveOracleExactCaseTableReference(statement, oracleLookupDbName, oracleTables);
+                        const exactQualifiedTable = resolveOracleExactCaseTableReference(statement, oracleLookupDbName, oracleTables, {
+                            qualifyUnqualified: shouldQualifyOracleUnqualifiedTables,
+                        });
                         if (exactQualifiedTable) {
                             executableStatement = rewriteLeadingSelectTableReference(statement, exactQualifiedTable) || statement;
                         }
diff --git a/frontend/src/components/queryEditor/QueryEditorHelpers.ts b/frontend/src/components/queryEditor/QueryEditorHelpers.ts
index da72521..7f2770d 100644
--- a/frontend/src/components/queryEditor/QueryEditorHelpers.ts
+++ b/frontend/src/components/queryEditor/QueryEditorHelpers.ts
@@ -1147,6 +1147,7 @@ export const resolveOracleExactCaseTableReference = (
     statement: string,
     currentDb: string,
     tables: CompletionTableMeta[],
+    options?: { qualifyUnqualified?: boolean },
 ): string | undefined => {
     const leadingTable = matchLeadingSelectTableReference(statement);
     if (!leadingTable) return undefined;
@@ -1155,7 +1156,8 @@ export const resolveOracleExactCaseTableReference = (
     if (segments.length === 0 || segments.length > 2 || segments.some((segment) => segment.quoted)) {
         return undefined;
     }
-    if (!segments.some((segment) => /[a-z]/.test(segment.value))) {
+    const shouldQualifyUnqualified = Boolean(options?.qualifyUnqualified && segments.length === 1);
+    if (!segments.some((segment) => /[a-z]/.test(segment.value)) && !shouldQualifyUnqualified) {
         return undefined;
     }
 
@@ -1170,7 +1172,7 @@ export const resolveOracleExactCaseTableReference = (
         const parsed = splitSidebarQualifiedName(String(table.tableName || ''));
         const objectName = String(parsed.objectName || table.tableName || '').trim();
         const schemaName = String(parsed.schemaName || table.dbName || '').trim();
-        if (objectName !== rawObjectName) return false;
+        if (objectName !== rawObjectName && objectName.toLowerCase() !== rawObjectName.toLowerCase()) return false;
         if (!rawSchemaName) return true;
         return schemaName.toLowerCase() === rawSchemaName.toLowerCase();
     });
@@ -1181,6 +1183,8 @@ export const resolveOracleExactCaseTableReference = (
     const exactSchemaName = String(matchedParsed.schemaName || matched.dbName || rawSchemaName).trim();
     const quotedParts = rawSchemaName
         ? [exactSchemaName, exactObjectName]
+        : shouldQualifyUnqualified
+            ? [exactSchemaName || targetDbName, exactObjectName]
         : [exactObjectName];
     if (quotedParts.some((part) => !String(part || '').trim())) {
         return undefined;
@@ -1195,6 +1199,15 @@ export const resolveOracleLikeDefaultSchemaName = (config: any): string => {
     return String(userPart || '').trim();
 };
 
+export const resolveOracleLikeExecutionSchemaName = (config: any, currentDb: string): string => {
+    const selectedDb = String(currentDb || '').trim();
+    const configuredDb = String(config?.database || '').trim();
+    if (selectedDb && (!configuredDb || selectedDb.toLowerCase() !== configuredDb.toLowerCase())) {
+        return selectedDb;
+    }
+    return resolveOracleLikeDefaultSchemaName(config) || selectedDb;
+};
+
 export const getQueryEditorModelTextIfWithinLimit = (model: any, maxTextLength: number): string | null => {
     const modelLength = getQueryEditorModelValueLength(model);
     if (modelLength !== null && modelLength > maxTextLength) {
@@ -2053,7 +2066,9 @@ export const resolveQueryLocatorPlan = async ({
     };
     if (forceReadOnly) return plan;
 
-    const defaultSchema = isOracleLikeDialect(dbType) ? resolveOracleLikeDefaultSchemaName(config) : '';
+    const defaultSchema = isOracleLikeDialect(dbType)
+        ? resolveOracleLikeExecutionSchemaName(config, currentDb)
+        : '';
     let tableRef = extractQueryResultTableRef(statement, dbType, currentDb, defaultSchema);
     if (!tableRef) return plan;
     plan.tableRef = tableRef;