+
−/*
+
− * 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 - 2018 MonetDB B.V.
+
− */
+
−
+
−import java.sql.*;
+
−
+
−public class Test_CisValid {
+
−	/* Test that after an error has occurred during a transaction, one can
+
−	 * still test if the connection is valid or not. 
+
−	 * The function Connection.isValid() should only return TRUE or FALSE. It
+
−	 * shall never alter the state of this connection */
+
−	public static void main(String[] args) throws Exception {
+
−		// Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");	// not needed anymore for self registering JDBC drivers
+
−		Connection conn = DriverManager.getConnection(args[0]);
+
−		Statement stmt = conn.createStatement();
+
−
+
−		try {
+
−			conn.setAutoCommit(false); // start a transaction
+
−			stmt.execute("SELECT COUNT(*) FROM doesnotexist;"); // let's trigger an error
+
−		} catch (SQLException e) {
+
−			// e.printStackTrace();
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−			System.err.println("Expected error: " + e);
+
−
+
−			try {
+
−				// test calling conn.isValid()
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−				System.out.println("Validating connection: conn.isValid? " + conn.isValid(30));
+
−				// Can we rollback on this connection without causing an error?
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−				conn.rollback();
+
−			} catch (SQLException e2) {
+
−				System.err.println("UnExpected error: " + e2);
+
−			}
+
−		}
+
−
+
−		stmt.close();
+
−		conn.close();
+
−	}
+
−}