HSQLDB example source code file (TestBatchBug.java)

This example HSQLDB source code file (TestBatchBug.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - HSQLDB tags/keywords

cached, cached, decimal_fields_per_dataset, decimal_fields_per_dataset, field_list_with_id, field_list_without_id, id, jdbc, sql, sqlexception, string, string, stringbuffer, stringbuffer, test_table_name, timestamp

The HSQLDB TestBatchBug.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.test;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Timestamp;

import org.hsqldb.jdbc.jdbcDataSource;

public class TestBatchBug {

    static final int    DATASET_COUNT              = 2;
    static final int    DECIMAL_FIELDS_PER_DATASET = 2;
    static final String TABLE_ATTR_CACHED          = "CACHED";
    static final String IN_PROCESS_FILE_URL =
        "jdbc:hsqldb:/temp/hsqldb/perftest";
    static final String HSQLDB_LOCALHOST_URL =
        "jdbc:hsqldb:hsql://localhost/yourtest";
    ;
    static final String TEST_TABLE_NAME       = "CSBug";
    static String       FIELD_LIST_WITHOUT_ID = "Kennung, Last_Update ";

// wird in static {} erweitert:
    static String FIELD_LIST_WITH_ID    = "ID, ";
    static String SQL_SELECT_ALL_FIELDS = "SELECT ";

// wird in static {} erweitert:
    static {
        for (int i = 1; i <= DECIMAL_FIELDS_PER_DATASET; i++) {
            FIELD_LIST_WITHOUT_ID += ", Field_" + i;
        }

        FIELD_LIST_WITH_ID += FIELD_LIST_WITHOUT_ID;
        SQL_SELECT_ALL_FIELDS += FIELD_LIST_WITH_ID + " FROM "
                                 + TEST_TABLE_NAME;
    }

    static int ldfNrFuerKennung;

    public static void main(String[] arg) {

        try {
            String[] urls = {
                IN_PROCESS_FILE_URL, HSQLDB_LOCALHOST_URL,
            };

            for (int i = 0; i < urls.length; i++) {
                String   url        = urls[i];
                String[] tableAttrs = { TABLE_ATTR_CACHED };

                for (int iAttr = 0; iAttr < tableAttrs.length; iAttr++) {
                    testURL(url, "CACHED");
                }
            }

            System.out.println("bye");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    static void testURL(String url, String tableAttr) throws SQLException {

        System.out.println(url);

        jdbcDataSource dataSource = new jdbcDataSource();

        dataSource.setDatabase(url);

        Connection con = dataSource.getConnection("sa", "");

        reCreateTable(con, "CACHED");
        populateTable(con);
        con.close();
    }

    static void reCreateTable(Connection con,
                              String tableAttr) throws SQLException {

        String cvsFileName = TEST_TABLE_NAME + ".csv";

// Create a statement object
        Statement stmt = con.createStatement();

// Try to drop the table
        try {

// stmt.executeUpdate("DROP TABLE " + TEST_TABLE_NAME + " IF EXISTS");
            stmt.executeUpdate("DROP TABLE " + TEST_TABLE_NAME);
        } catch (SQLException e) {    // Ignore Exception, because the table may not yet exist
            System.out.println(e.getMessage());
        }

        StringBuffer sql = new StringBuffer();

        sql.append("CREATE ");
        sql.append(tableAttr);    // z.B. "CACHED"
        sql.append(" TABLE ");
        sql.append(TEST_TABLE_NAME);
        sql.append(" (");
        sql.append("Id integer IDENTITY");
        sql.append(", ");
        sql.append("Kennung varchar(20) NOT NULL");

// etwas andere Schreibweise von CURRENT TIMESTAMP
        sql.append(", last_update TIMESTAMP ");
        sql.append("DEFAULT CURRENT_TIMESTAMP NOT NULL");

        for (int i = 1; i <= DECIMAL_FIELDS_PER_DATASET; i++) {
            sql.append(", Field_" + i + " decimal");
        }

        sql.append(", UNIQUE(Kennung)");
        sql.append(")");
        System.out.println(sql.toString());
        stmt.executeUpdate(sql.toString());

// CLEAR TABLE
        sql = new StringBuffer();

        sql.append("DELETE FROM ");
        sql.append(TEST_TABLE_NAME);
        System.out.println(sql.toString());
        stmt.executeUpdate(sql.toString());
        stmt.close();    // is no longer used
    }

// tries to enter 2 records
    static void populateTable(Connection con) throws SQLException {

        long      startTime = System.currentTimeMillis();
        Timestamp now       = new Timestamp(startTime);

        con.setAutoCommit(false);

        String            sql  = createInsertSQL(true, false);
        PreparedStatement prep = con.prepareStatement(sql);

        prep.clearParameters();
        prep.setString(1, "xxx");
        prep.setTimestamp(2, now);    // last_update

        for (int ii = 0; ii < DECIMAL_FIELDS_PER_DATASET; ii++) {
            prep.setDouble(ii + 3, 0.123456789);    // Wert
        }

        prep.addBatch();
        prep.setString(1, "yyy");
        prep.setTimestamp(2, now);    // last_update

        for (int ii = 0; ii < DECIMAL_FIELDS_PER_DATASET; ii++) {
            prep.setDouble(ii + 3, 0.123456789);    // Wert
        }

        prep.addBatch();

        int[] updateCounts = prep.executeBatch();

        con.setAutoCommit(true);
        prep.close();
    }

    static String createInsertSQL(boolean prepStmt, boolean getIdAfterInsert) {

        StringBuffer sql = new StringBuffer();

        sql.append("INSERT INTO ");
        sql.append(TEST_TABLE_NAME);
        sql.append(" (");
        sql.append(FIELD_LIST_WITHOUT_ID);
        sql.append(") VALUES (");

        Timestamp now = new Timestamp(System.currentTimeMillis());
        Object    val = "?";

        if (prepStmt) {
            sql.append(val + ", " + val);
        } else {
            long millis = System.currentTimeMillis();

            sql.append("'Ken");
            sql.append((++ldfNrFuerKennung) + "'");

            val = new Double(0.123456789) + "";

            sql.append(", '" + now.toString() + "'");
        }

        for (int i = 1; i <= DECIMAL_FIELDS_PER_DATASET; i++) {
            sql.append(", " + val);
        }

        sql.append(")");

        String ret = sql.toString();

        System.out.println(ret);

        return ret;
    }
}