Support empty statements that just contains a comment.

h2/src/docsrc/html/changelog.html

@@ -18,7 +18,8 @@ Change Log
 <h1>Change Log</h1>
 
 <h2>Next Version (unreleased)</h2>
-<ul><li>Server mode: if there was an error while reading from a LOB, the session was closed in some cases.
+<ul><li>Support empty statements that just contains a comment.
+</li><li>Server mode: if there was an error while reading from a LOB, the session was closed in some cases.
 </li><li>Issue 463: Driver name and version are now the same in OsgiDataSourceFactory and JdbcDatabaseMetaData.
 </li><li>JaQu: The data type VARCHAR is now (again) used for Strings
     (no longer TEXT, except when explicitly set).
@@ -52,8 +53,10 @@ Change Log
 </li><li>Fix a NullPointerException when attempting to add foreign key reference to a view.
 </li><li>Add sufficient ClientInfo support to our javax.sql.Connection implementation to make WebSphere happy.
 </li><li>Issue 482: class LobStorageBackend$LobInputStream does not override the method InputStream.available().
-</li><li>Fix corruption resulting from a mix of the "WRITE_DELAY=0" option and "SELECT DISTINCT" queries
-</li><li>Fix the combination of updating a table which contains an LOB, and reading from the LOB at the same time.
+</li><li>Fix corruption resulting from a mix of the "WRITE_DELAY=0" option 
+    and "SELECT DISTINCT" queries that don't fit in memory.
+</li><li>Fix the combination of updating a table which contains an LOB, 
+    and reading from the LOB at the same time.
     Previously it would throw an exception, now it works.
 </li><li>Issue 484: In the H2 Console tool, all schemas starting with "INFO" where hidden.
     Now they are hidden only if the database is not H2. Patch from "mgcodeact"/"cumer d"

h2/src/main/org/h2/command/Parser.java

@@ -439,6 +439,9 @@ public class Parser {
                     c = parseWith();
                 }
                 break;
+            case ';':
+                c = new NoOperation(session);
+                break;
             default:
                 throw getSyntaxError();
             }

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

@@ -39,6 +39,7 @@ public class TestCases extends TestBase {
 
     @Override
     public void test() throws Exception {
+        testEmptyStatements();
         testViewParameters();
         testLargeKeys();
         testExtraSemicolonInDatabaseURL();
@@ -101,6 +102,16 @@ public class TestCases extends TestBase {
         deleteDb("cases");
     }
     
+    private void testEmptyStatements() throws SQLException {
+        Connection conn = getConnection("cases");
+        Statement stat = conn.createStatement();
+        stat.execute("/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;");
+        stat.execute("");
+        stat.execute(";");
+        stat.execute(" ;");
+        conn.close();
+    }
+
     private void testViewParameters() throws SQLException {
         deleteDb("cases");
         Connection conn = getConnection("cases");