Creating a table with column data type NULL now works (even if not very useful).

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

@@ -3654,11 +3654,6 @@ public class Parser {
             original = "VARCHAR_IGNORECASE";
             dataType = DataType.getTypeByName(original);
         }
-        if (dataType.type == Value.NULL) {
-            // We do support NULL in the database meta data,
-            // but not actually when creating tables.
-            throw DbException.get(ErrorCode.UNKNOWN_DATA_TYPE_1, original);
-        }
         if (regular) {
             read();
         }

h2/src/test/org/h2/test/test-1.3.txt

@@ -1031,18 +1031,6 @@ select t1.pk from t t1, t t2 where t1.pk = t2.attr order by t1.pk;
 drop table t;
 > ok
 
-CREATE TABLE T(A NULL);
-> exception
-
-CREATE TABLE T(A INT);
-> ok
-
-ALTER TABLE T ALTER COLUMN A NULL;
-> exception
-
-DROP TABLE T;
-> ok
-
 CREATE ROLE TEST_A;
 > ok