view example/SQLImport.java @ 85:073ee535234b embedded

Ok. Now everything compiles back with Ant again. Moved the Embedded stuff to the temporary MonetDBJavaLite repository before moving into the suggested MonetDBLite repository. The soon generated Embedded Connection jar will have a dependency on the regular JDBC driver jar. The JDBC driver jar is independent, however if attempted to create an Embedded Connection with will try to load the respective class from the class loader, failing if the Embedded Connection jar is not present. If anyone in the group has expertise on Java Class dynamic loading, please contact me because there might be issues on this. Removed the pom.xml file because the regular maven compilation fails.
author Pedro Ferreira <pedro.ferreira@monetdbsolutions.com>
date Fri, 30 Dec 2016 18:55:13 +0000 (2016-12-30)
parents a5a898f6886c
children 6f74e01c57da
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/*
 * 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.sql.*;
import java.io.*;

/**
 * This simple example somewhat emulates the mclient command. However in
 * it's simpleness it only supports SQL queries which entirely are on one line.
 *
 * This program reads a file line by line, and feeds the line into a running
 * Mserver on the localhost. Upon error, the error is reported and the program
 * continues reading and executing lines.
 * A very lousy way of implementing options is used to somewhat configure the
 * behaviour of the program in order to be a bit more verbose or commit after
 * each (sucessfully) executed line.
 *
 * The program uses a debuglog in which the exact conversation between the
 * JDBC driver and Mserver is reported. The log file is put in the current
 * working directory and names like monet_[unix timestamp].log
 *
 * @author Fabian Groffen
 */

public class SQLImport {
	public static void main(String[] args) throws Exception {
		if (args.length < 1) {
			System.out.println("synopsis: java SQLImport filename [autocommit] [verbose]");
			System.exit(-1);
		}

		// open the file
		BufferedReader fr = new BufferedReader(new FileReader(args[0]));

		// Class.forName("nl.cwi.monetdb.jdbc.MonetDriver");
		// request a connection suitable for Monet from the driver manager
		// note that the database specifier is currently not implemented, for
		// Monet itself can't access multiple databases.
		// turn on debugging
		Connection con = DriverManager.getConnection("jdbc:monetdb://localhost/database?debug=true", "monetdb", "monetdb");

		boolean beVerbose = false;
		if (args.length == 3) {
			// turn on verbose mode
			beVerbose = true;
		}
		if (args.length < 2) {
			// disable auto commit using the driver
			con.setAutoCommit(false);
		}

		// get a statement to execute on
		Statement stmt = con.createStatement();

		String query;
		for (int i = 1; (query = fr.readLine()) != null; i++) {
			if (beVerbose) System.out.println(query);
			try {
				// execute the query, no matter what it is
				stmt.execute(query);
			} catch (SQLException e) {
				System.out.println("Error on line " + i + ": " + e.getMessage());
				if (!beVerbose) System.out.println(query);
			}
		}

		// free resources, close the statement
		stmt.close();
		// close the connection with the database
		con.close();
		fr.close();
	}
}