From 0a5e9256f11c9d446e5ab3b26741bd5554f2b047 Mon Sep 17 00:00:00 2001
From: florijan <florijan@memgraph.io>
Date: Fri, 1 Sep 2017 14:09:36 +0200
Subject: [PATCH] ExpandBreadthFirst can also have optional input

Reviewers: teon.banek

Reviewed By: teon.banek

Differential Revision: https://phabricator.memgraph.io/D735
---
 src/query/plan/operator.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/query/plan/operator.cpp b/src/query/plan/operator.cpp
index 519da233f..e20a519f2 100644
--- a/src/query/plan/operator.cpp
+++ b/src/query/plan/operator.cpp
@@ -918,7 +918,7 @@ ExpandBreadthFirst::ExpandBreadthFirst(
       inner_node_symbol_(inner_node_symbol),
       inner_edge_symbol_(inner_edge_symbol),
       where_(where),
-      input_(input),
+      input_(input ? input : std::make_shared<Once>()),
       input_symbol_(input_symbol),
       existing_node_(existing_node),
       graph_view_(graph_view) {}