[MVStore] Can not find the records from the secondary index if the value of primary key is negative and the type of index condition is EQUAL

H2 Version: svn trunk

Test:
==========================================
{{{
package my.test.mvstore.bugs;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;

import org.junit.Assert;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

public class TestMVSecondaryIndex {
    protected static Connection conn;
    protected static Statement stmt;

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
        conn = DriverManager.getConnection("jdbc:h2:tcp://localhost:9092/mydb", "sa", "");
        stmt = conn.createStatement();
    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception {
        if (stmt != null)
            stmt.close();
        if (conn != null)
            conn.close();
    }

    @Test
    public void testRegularTable() throws Exception {
        run(null); //all tests pass
    }

    @Test
    public void testMVTable() throws Exception {
        run("org.h2.mvstore.db.MVTableEngine");
    }

    private void run(String engine) throws Exception {
        stmt.executeUpdate("DROP TABLE IF EXISTS TestMVSecondaryIndex");
        String sql = "CREATE TABLE IF NOT EXISTS TestMVSecondaryIndex(id int not null PRIMARY KEY, name varchar(20))";
        if (engine != null)
            sql += " ENGINE \"" + engine + "\"";

        stmt.executeUpdate(sql);

        stmt.executeUpdate("CREATE INDEX IF NOT EXISTS idx_name ON TestMVSecondaryIndex(name)");

        stmt.executeUpdate("insert into TestMVSecondaryIndex(id, name) values(-1, 'a')");
        stmt.executeUpdate("insert into TestMVSecondaryIndex(id, name) values(-2, 'a')");
        stmt.executeUpdate("insert into TestMVSecondaryIndex(id, name) values(1, 'b')");
        stmt.executeUpdate("insert into TestMVSecondaryIndex(id, name) values(2, 'b')");

        count(2, "name='b'");
        count(2, "name='a'"); //MVTable failed
    }

    private void count(int expected, String where) throws Exception {
        ResultSet rs = stmt.executeQuery("select count(*) from TestMVSecondaryIndex where " + where);
        rs.next();
        Assert.assertEquals(expected, rs.getInt(1));
        rs.close();
    }
}
}}}

Analyze:
===============
The org.h2.mvstore.db.MVSecondaryIndex.find(Session, SearchRow, SearchRow) 
method using 0 as the key If the parameter 'first' is not null,
then ['a', 0] > ['a', -1]

Fix:
===============
Using Long.MIN_VALUE as the key may be better

Original issue reported on code.google.com by zhh200...@gmail.com on 20 May 2013 at 7:02

hamidhtc / h2database

[MVStore] Can not find the records from the secondary index if the value of primary key is negative and the type of index condition is EQUAL #465