diff --git a/crates/ra_analysis/src/imp.rs b/crates/ra_analysis/src/imp.rs
index 4ef2129c3d..c4291885aa 100644
--- a/crates/ra_analysis/src/imp.rs
+++ b/crates/ra_analysis/src/imp.rs
@@ -74,7 +74,7 @@ impl AnalysisHostImpl {
                 self.db
                     .query_mut(LibrarySymbolsQuery)
                     .set_constant(library.root_id, Arc::new(library.symbol_index));
-                self.apply_root_change_constant(library.root_id, library.root_change);
+                self.apply_root_change(library.root_id, library.root_change);
             }
             self.db
                 .query_mut(ra_db::LibraryRootsQuery)
@@ -115,34 +115,6 @@ impl AnalysisHostImpl {
             .set(root_id, Arc::new(source_root));
     }
 
-    fn apply_root_change_constant(&mut self, root_id: SourceRootId, root_change: RootChange) {
-        let mut source_root = SourceRoot::clone(&self.db.source_root(root_id));
-        for add_file in root_change.added {
-            self.db
-                .query_mut(ra_db::FileTextQuery)
-                .set_constant(add_file.file_id, add_file.text);
-            self.db
-                .query_mut(ra_db::FileRelativePathQuery)
-                .set_constant(add_file.file_id, add_file.path.clone());
-            self.db
-                .query_mut(ra_db::FileSourceRootQuery)
-                .set_constant(add_file.file_id, root_id);
-            source_root.files.insert(add_file.path, add_file.file_id);
-        }
-        for remove_file in root_change.removed {
-            self.db
-                .query_mut(ra_db::FileTextQuery)
-                .set_constant(remove_file.file_id, Default::default());
-            self.db
-                .query_mut(ra_db::FileRelativePathQuery)
-                .set_constant(remove_file.file_id, Default::default());
-            source_root.files.remove(&remove_file.path);
-        }
-        self.db
-            .query_mut(ra_db::SourceRootQuery)
-            .set_constant(root_id, Arc::new(source_root));
-    }
-
     #[allow(unused)]
     /// Ideally, we should call this function from time to time to collect heavy
     /// syntax trees. However, if we actually do that, everything is recomputed