Attached is a patch against the CVS repository that fixes the ResultSet absolute() problem.

There's also a little fix for the getRow() method. While fixing
absolute(), I noticed that getRow() wasn't quite following the spec: it
wasn't returning 0 when the ResultSet wasn't positioned on a row.  I've
started a ResultSet test case and included it as well.

Liam Stewart

src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java

@@ -836,6 +836,7 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
 		//if index<0, count from the end of the result set, but check
 		//to be sure that it is not beyond the first index
 		if (index < 0)
+		{
 			if (index >= -rows_size)
 				internalIndex = rows_size + index;
 			else
@@ -843,16 +844,19 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
 				beforeFirst();
 				return false;
 			}
-
-		//must be the case that index>0,
-		//find the correct place, assuming that
-		//the index is not too large
-		if (index <= rows_size)
-			internalIndex = index - 1;
+		}
 		else
 		{
-			afterLast();
-			return false;
+			//must be the case that index>0,
+			//find the correct place, assuming that
+			//the index is not too large
+			if (index <= rows_size)
+				internalIndex = index - 1;
+			else
+			{
+				afterLast();
+				return false;
+			}
 		}
 
 		current_row = internalIndex;
@@ -1074,6 +1078,11 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
 
 	public int getRow() throws SQLException
 	{
+		final int rows_size = rows.size();
+
+		if (current_row < 0 || current_row >= rows_size)
+			return 0;
+		
 		return current_row + 1;
 	}
 

src/interfaces/jdbc/org/postgresql/test/JDBC2Tests.java

@@ -205,6 +205,7 @@ public class JDBC2Tests extends TestSuite
 		// Connectivity/Protocols
 
 		// ResultSet
+		suite.addTestSuite(ResultSetTest.class);
 
 		// Time, Date, Timestamp
 		suite.addTestSuite(DateTest.class);

src/interfaces/jdbc/org/postgresql/test/jdbc2/ResultSetTest.java

+package org.postgresql.test.jdbc2;
+
+import org.postgresql.test.JDBC2Tests;
+import junit.framework.TestCase;
+import java.io.*;
+import java.sql.*;
+
+/**
+ * ResultSet tests.
+ */
+public class ResultSetTest extends TestCase
+{
+	private Connection con;
+
+	public ResultSetTest(String name)
+	{
+		super(name);
+	}
+
+	protected void setUp() throws Exception
+	{
+		con = JDBC2Tests.openDB();
+		Statement stmt = con.createStatement();
+		
+		JDBC2Tests.createTable(con, "testrs", "id integer");
+
+		stmt.executeUpdate("INSERT INTO testrs VALUES (1)");
+		stmt.executeUpdate("INSERT INTO testrs VALUES (2)");
+		stmt.executeUpdate("INSERT INTO testrs VALUES (3)");
+		stmt.executeUpdate("INSERT INTO testrs VALUES (4)");
+		stmt.executeUpdate("INSERT INTO testrs VALUES (6)");
+		stmt.executeUpdate("INSERT INTO testrs VALUES (9)");
+
+		stmt.close();
+	}
+
+	protected void tearDown() throws Exception
+	{
+		JDBC2Tests.dropTable(con, "testrs");
+		JDBC2Tests.closeDB(con);
+	}
+
+	public void testAbsolute() throws Exception
+	{
+		Statement stmt = con.createStatement();
+		ResultSet rs = stmt.executeQuery("SELECT * FROM testrs");
+		
+		assertTrue(rs.absolute(-1));
+		assertEquals(6, rs.getRow());
+
+		assertTrue(rs.absolute(1));
+		assertEquals(1, rs.getRow());
+
+		assertTrue(!rs.absolute(-10));
+		assertEquals(0, rs.getRow());
+ 		assertTrue(rs.next());
+ 		assertEquals(1, rs.getRow());
+
+		assertTrue(!rs.absolute(10));
+		assertEquals(0, rs.getRow());
+		assertTrue(rs.previous());
+		assertEquals(6, rs.getRow());
+		
+		stmt.close();
+	}
+}