new file mode 100644
--- /dev/null
+++ b/tests/Test_Int128.java
@@ -0,0 +1,69 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0.  If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Copyright 1997 - July 2008 CWI, August 2008 - 2016 MonetDB B.V.
+ */
+
+import java.math.BigDecimal;
+import java.math.BigInteger;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+/* Test whether we can represent a full-size int128 as JDBC results */
+public class Test_Int128 {
+	public static void main(String[] args) throws Exception {
+		Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");
+		Connection con = DriverManager.getConnection(args[0]);
+		BigInteger bi = new BigInteger(
+				"123456789012345678909876543210987654321");
+		BigDecimal bd = new BigDecimal(
+				"1234567890123456789.9876543210987654321");
+		try {
+			con.setAutoCommit(false);
+			Statement s = con.createStatement();
+			s.executeUpdate("CREATE TABLE HUGEINTT (I HUGEINT)");
+			s.executeUpdate("CREATE TABLE HUGEDECT (I DECIMAL(38,19))");
+
+			PreparedStatement insertStatement = con
+					.prepareStatement("INSERT INTO HUGEINTT VALUES (?)");
+			insertStatement.setBigDecimal(1, new BigDecimal(bi));
+			insertStatement.executeUpdate();
+			insertStatement.close();
+			
+			s.executeUpdate("INSERT INTO HUGEDECT VALUES ("+bd+");");
+
+			ResultSet rs = s.executeQuery("SELECT I FROM HUGEINTT");
+			rs.next();
+			BigInteger biRes = rs.getBigDecimal(1).toBigInteger();
+			rs.close();
+			rs = s.executeQuery("SELECT I FROM HUGEDECT");
+			rs.next();
+			BigDecimal bdRes = rs.getBigDecimal(1);
+			rs.close();
+			s.close();
+			
+			System.out.println("Expecting " + bi + ", got " + biRes);
+			if (!bi.equals(biRes)) {
+				throw new RuntimeException();
+			}
+			
+			System.out.println("Expecting " + bd + ", got " + bdRes);
+			if (!bd.equals(bdRes)) {
+				throw new RuntimeException();
+			}
+			System.out.println("SUCCESS");
+
+		} catch (SQLException e) {
+			System.out.println("FAILED :( " + e.getMessage());
+			System.out.println("ABORTING TEST!!!");
+		}
+
+		con.close();
+	}
+}