diff --git a/README.md b/README.md
index a7c8f53c..03f6fc3f 100644
--- a/README.md
+++ b/README.md
@@ -138,11 +138,22 @@ Basic usage:
 __Linux install:__
 git clone date library, needed connectors, cmake and make install them.
 
-create DDL files (like mysql: 'show create table MyDatabase.MyTable'), create headers for them with provided python script:
+
+__Create DDL files__:
+``` 
+mysql: 'show create table MyDatabase.MyTable'
+mysqldump --no-data MyDatabase > MyDatabase.sql ca
+
+```
+Create headers for them with provided python script:
 ```
 %sqlpp11_dir%/scripts/ddl2cpp ~/temp/MyTable.ddl  ~/temp/MyTable %DatabaseNamespaceForExample%
 ```
-include generated header (MyTable.h), that's all
+(In case you're getting notes about unsupported column type take a look at the other datatypes in sqlpp11/data_types. They are not hard to implement.)
+
+Include generated header (MyTable.h), that's all
+
+
 
 
 License:
diff --git a/scripts/ddl2cpp b/scripts/ddl2cpp
index 2b422078..f558cebf 100755
--- a/scripts/ddl2cpp
+++ b/scripts/ddl2cpp
@@ -181,7 +181,10 @@ for create in tableCreations:
         print('            const T& operator()() const { return ' + columnMember + '; }', file=header)
         print('          };', file=header)
         print('      };', file=header)
-        traitslist = [NAMESPACE + '::' + types[sqlColumnType]];
+        try:
+            traitslist = [NAMESPACE + '::' + types[sqlColumnType]];
+        except KeyError as e:
+            print ('Error: datatype "'  + sqlColumnType + '"" is not supported. Implement it (examples: sqlpp11/data_types) or raise an issue on github')
         requireInsert = True
         if column.hasAutoValue:
             traitslist.append(NAMESPACE + '::tag::must_not_insert');