diff --git a/packages/cubejs-schema-compiler/src/adapter/OracleQuery.ts b/packages/cubejs-schema-compiler/src/adapter/OracleQuery.ts
index d5e4871b88497..46fdfaa0e7ed7 100644
--- a/packages/cubejs-schema-compiler/src/adapter/OracleQuery.ts
+++ b/packages/cubejs-schema-compiler/src/adapter/OracleQuery.ts
@@ -71,11 +71,14 @@ export class OracleQuery extends BaseQuery {
   }
 
   public dateTimeCast(value) {
-    return `to_date(:"${value}", 'YYYY-MM-DD"T"HH24:MI:SS"Z"')`;
+    // Use timezone-aware parsing for ISO 8601 with milliseconds and trailing 'Z', then cast to DATE
+    // to preserve index-friendly comparisons against DATE columns.
+    return `CAST(TO_TIMESTAMP_TZ(:"${value}", 'YYYY-MM-DD"T"HH24:MI:SS.FF"Z"') AS DATE)`;
   }
 
   public timeStampCast(value) {
-    return this.dateTimeCast(value);
+    // Return timezone-aware timestamp for TIMESTAMP comparisons
+    return `TO_TIMESTAMP_TZ(:"${value}", 'YYYY-MM-DD"T"HH24:MI:SS.FF"Z"')`;
   }
 
   public timeStampParam(timeDimension) {
diff --git a/packages/cubejs-schema-compiler/test/unit/oracle-query.test.ts b/packages/cubejs-schema-compiler/test/unit/oracle-query.test.ts
new file mode 100644
index 0000000000000..c3680d796f384
--- /dev/null
+++ b/packages/cubejs-schema-compiler/test/unit/oracle-query.test.ts
@@ -0,0 +1,111 @@
+import { OracleQuery } from '../../src/adapter/OracleQuery';
+import { prepareJsCompiler } from './PrepareCompiler';
+
+describe('OracleQuery', () => {
+  const { compiler, joinGraph, cubeEvaluator } = prepareJsCompiler(`
+    cube(\`visitors\`, {
+      sql: \`
+      select * from visitors
+      \`,
+
+      measures: {
+        count: {
+          type: 'count'
+        }
+      },
+
+      dimensions: {
+        id: {
+          sql: 'id',
+          type: 'number',
+          primaryKey: true
+        },
+        createdAt: {
+          type: 'time',
+          sql: 'created_at'
+        }
+      }
+    })
+    `, { adapter: 'oracle' });
+
+  it('generates TO_TIMESTAMP_TZ with millisecond precision for date range filters', async () => {
+    await compiler.compile();
+
+    const query = new OracleQuery(
+      { joinGraph, cubeEvaluator, compiler },
+      {
+        measures: ['visitors.count'],
+        timeDimensions: [
+          {
+            dimension: 'visitors.createdAt',
+            dateRange: ['2024-02-01', '2024-02-02'],
+            granularity: 'day'
+          }
+        ],
+        timezone: 'UTC'
+      }
+    );
+
+    const [sql, params] = query.buildSqlAndParams();
+
+    // Verify TO_TIMESTAMP_TZ is used with proper ISO 8601 format including milliseconds
+    expect(sql).toContain('TO_TIMESTAMP_TZ(:"?", \'YYYY-MM-DD"T"HH24:MI:SS.FF"Z"\')');
+    expect(sql).toMatch(/created_at\s+>=\s+TO_TIMESTAMP_TZ/);
+    expect(sql).toMatch(/created_at\s+<=\s+TO_TIMESTAMP_TZ/);
+    
+    // Verify parameters include millisecond precision
+    expect(params).toEqual(['2024-02-01T00:00:00.000Z', '2024-02-02T23:59:59.999Z']);
+  });
+
+  it('generates TRUNC function for day granularity grouping', async () => {
+    await compiler.compile();
+
+    const query = new OracleQuery(
+      { joinGraph, cubeEvaluator, compiler },
+      {
+        measures: ['visitors.count'],
+        timeDimensions: [
+          {
+            dimension: 'visitors.createdAt',
+            dateRange: ['2024-01-01', '2024-01-31'],
+            granularity: 'day'
+          }
+        ],
+        timezone: 'UTC'
+      }
+    );
+
+    const [sql, params] = query.buildSqlAndParams();
+
+    // Verify TRUNC with DD format for day grouping
+    expect(sql).toContain('TRUNC("visitors".created_at, \'DD\')');
+    expect(sql).toMatch(/GROUP BY\s+TRUNC/);
+    expect(params).toEqual(['2024-01-01T00:00:00.000Z', '2024-01-31T23:59:59.999Z']);
+  });
+
+  it('generates TRUNC function for month granularity grouping', async () => {
+    await compiler.compile();
+
+    const query = new OracleQuery(
+      { joinGraph, cubeEvaluator, compiler },
+      {
+        measures: ['visitors.count'],
+        timeDimensions: [
+          {
+            dimension: 'visitors.createdAt',
+            dateRange: ['2024-01-01', '2024-12-31'],
+            granularity: 'month'
+          }
+        ],
+        timezone: 'UTC'
+      }
+    );
+
+    const [sql, params] = query.buildSqlAndParams();
+
+    // Verify TRUNC with MM format for month grouping
+    expect(sql).toContain('TRUNC("visitors".created_at, \'MM\')');
+    expect(sql).toMatch(/GROUP BY\s+TRUNC/);
+    expect(params).toEqual(['2024-01-01T00:00:00.000Z', '2024-12-31T23:59:59.999Z']);
+  });
+});