A subselect which used an index could lead to wrong results. Fixed.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,7 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>
+<ul><li>A subselect which used an index could lead to wrong results. Fixed.
 </li></ul>
 
 <h2>Version 1.2.135 (2010-05-08)</h2>

h2/src/main/org/h2/index/IndexCursor.java

@@ -67,6 +67,7 @@ public class IndexCursor implements Cursor {
         alwaysFalse = false;
         start = end = null;
         inList = null;
+        inColumn = null;
         inResult = null;
         inResultTested = new HashSet<Value>();
         for (IndexCondition condition : indexConditions) {

h2/src/test/org/h2/test/db/TestCases.java

@@ -36,6 +36,7 @@ public class TestCases extends TestBase {
     }
 
     public void test() throws Exception {
+        testPreparedSubquery2();
         testPreparedSubquery();
         testCompareDoubleWithIntColumn();
         testDeleteIndexOutOfBounds();
@@ -79,7 +80,40 @@ public class TestCases extends TestBase {
         testCollation();
         deleteDb("cases");
     }
+    
+    private void testPreparedSubquery2() throws SQLException {
+        deleteDb("cases");
+        Connection conn = getConnection("cases");
+        Statement stat = conn.createStatement();
+        stat.execute("create table test(id int primary key, name varchar(255))");
+        stat.execute("insert into test values(1, 'Hello')");
+        stat.execute("insert into test values(2, 'World')");
+
+        PreparedStatement ps = conn.prepareStatement("select name from test where id in (select id from test where name = ?)");
+        ps.setString(1, "Hello");
+        ResultSet rs = ps.executeQuery();
+        if (rs.next()) {
+            if (!rs.getString("name").equals("Hello")) {
+                fail("'" + rs.getString("name") + "' must be 'Hello'");                
+            }
+        } else {
+            fail("Must have a result!");
+        }
+        rs.close();
 
+        ps.setString(1, "World");
+        rs = ps.executeQuery();
+        if (rs.next()) {
+            if (!rs.getString("name").equals("World")) {
+                fail("'" + rs.getString("name") + "' must be 'World'");                
+            }
+        } else {
+            fail("Must have a result!");
+        }
+        rs.close();
+        conn.close();
+    }
+    
     private void testPreparedSubquery() throws SQLException {
         deleteDb("cases");
         Connection conn = getConnection("cases");