fixed queryer issue with nested families

src/queryer/compiler.rs

@@ -213,6 +213,7 @@ impl<'a> Compiler<'a> {
 
       let mut case_node = node.clone();
       case_node.parent_alias = base_alias.clone();
+      case_node.property_name = None;
       let arc_aliases = std::sync::Arc::new(table_aliases.clone());
       case_node.parent_type_aliases = Some(arc_aliases);
       case_node.parent_type = Some(r#type);