sql select join progress

src/sql/query_intermediates.cpp

@@ -76,9 +76,34 @@ query_order_by_intermediate query_where_intermediate::order_by(const std::string
   return {connection_, builder_.order_by(name)};
 }
 
+query_join_intermediate query_on_intermediate::join(const std::string &join_table_name, const std::string &as)
+{
+  return {connection_, builder_.join(join_table_name, join_type_t::INNER, as)};
+}
+
+query_where_intermediate query_on_intermediate::where(const basic_condition &cond)
+{
+  return {connection_, builder_.where(cond)};
+}
+
+query_group_by_intermediate query_on_intermediate::group_by(const std::string &name)
+{
+  return {connection_, builder_.group_by(name)};
+}
+
+query_order_by_intermediate query_on_intermediate::order_by(const std::string &name)
+{
+  return {connection_, builder_.order_by(name)};
+}
+
+query_on_intermediate query_join_intermediate::on(const std::string &column, const std::string &join_column)
+{
+  return {connection_, builder_.on(column, join_column)};
+}
+
 query_join_intermediate query_from_intermediate::join(const std::string &join_table_name, const std::string &as)
 {
-  return query_join_intermediate();
+  return {connection_, builder_.join(join_table_name, join_type_t::INNER, as)};
 }
 
 query_where_intermediate query_from_intermediate::where(const basic_condition &cond)