Fulltext search: a NullPointerException was thrown when updating a value that was NULL previously.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,9 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>The Recover tool did not work with .data.db files of the wrong size.
+<ul><li>Fulltext search: a NullPointerException was thrown when updating a value that
+    was NULL previously.
+</li><li>The Recover tool did not work with .data.db files of the wrong size.
 </li><li>Triggers: if there was an exception when initializing a trigger, this exception could be hidden,
     and in some cases (specially when using the Lucene fulltext index mechanism) a NullPointerException was
     thrown later on. Now the exception that occurred on init is thrown when changing data.

h2/src/main/org/h2/fulltext/FullText.java

@@ -689,7 +689,11 @@ public class FullText {
     static boolean hasChanged(Object[] oldRow, Object[] newRow, int[] indexColumns) {
         for (int c : indexColumns) {
             Object o = oldRow[c], n = newRow[c];
-            if (!o.equals(n)) {
+            if (o == null) {
+                if (n != null) {
+                    return true;
+                }
+            } else if (!o.equals(n)) {
                 return true;
             }
         }

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

@@ -86,6 +86,8 @@ public class TestFullText extends TestBase {
         stat.execute("CREATE TABLE TEST(ID INT PRIMARY KEY, NAME VARCHAR)");
         stat.execute("INSERT INTO TEST VALUES(1, 'Hello World')");
         stat.execute("CALL " + prefix + "_CREATE_INDEX('PUBLIC', 'TEST', NULL)");
+        stat.execute("UPDATE TEST SET NAME=NULL WHERE ID=1");
+        stat.execute("UPDATE TEST SET NAME='Hello World' WHERE ID=1");
         conn.close();
 
         conn = getConnection("fullTextReopen");