Merge dev3-240.dev.cn.tlan:/home/justin.he/mysql/mysql-5.0/bug24568-5.0-ndb-bj

into  dev3-240.dev.cn.tlan:/home/justin.he/mysql/mysql-5.1/bug24568-5.1-new-ndb-bj

storage/ndb/src/ndbapi/NdbScanFilter.cpp

@@ -328,11 +328,17 @@ NdbScanFilterImpl::cond_col(Interpreter::UnaryCondition op, Uint32 AttrId){
 
 int
 NdbScanFilter::isnull(int AttrId){
+  if(m_impl.m_negative == 1)
+    return m_impl.cond_col(Interpreter::IS_NOT_NULL, AttrId);
+  else
     return m_impl.cond_col(Interpreter::IS_NULL, AttrId);
 }
 
 int
 NdbScanFilter::isnotnull(int AttrId){
+  if(m_impl.m_negative == 1)
+    return m_impl.cond_col(Interpreter::IS_NULL, AttrId);
+  else
     return m_impl.cond_col(Interpreter::IS_NOT_NULL, AttrId);
 }