diff -r 733334eca89b -r 8fd6c4d44071 include/RelationalWriter.h
--- a/include/RelationalWriter.h	Sun Jul 22 00:08:13 2018 +0200
+++ b/include/RelationalWriter.h	Sun Jul 22 10:26:22 2018 +0200
@@ -15,9 +15,9 @@
 
 	virtual ~RelationalWriter() = default;
 
-	virtual integer_t toTypeId(const string_t typeCode) = 0;
+	virtual TypeId toTypeId(const string_t typeCode) = 0;
 
-	virtual string_t toTypeCode(const integer_t typeId) = 0;
+	virtual string_t toTypeCode(const TypeId typeId) = 0;
 
 	virtual void startRelation(string_t name, std::vector<std::pair<string_t, TypeId>> attributes, boolean_t writeHeader) = 0;