From ae423ac00829cc63c9bdcfa52e857ea58589a9d3 Mon Sep 17 00:00:00 2001
From: laura-ding <48548375+laura-ding@users.noreply.github.com>
Date: Tue, 20 Jul 2021 15:46:08 +0800
Subject: [PATCH] Fix the go return bad_type when the vertex without the tag
 (#1273)

Co-authored-by: Yee <2520865+yixinglu@users.noreply.github.com>
---
 src/context/Iterator.cpp         |  3 +++
 tests/tck/features/go/GO.feature | 11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/src/context/Iterator.cpp b/src/context/Iterator.cpp
index 9fc92de07..344849276 100644
--- a/src/context/Iterator.cpp
+++ b/src/context/Iterator.cpp
@@ -298,6 +298,9 @@ const Value& GetNeighborsIter::getTagProp(const std::string& tag,
     auto colId = index->second.colIdx;
     auto& row = *currentRow_;
     DCHECK_GT(row.size(), colId);
+    if (row[colId].empty()) {
+        return Value::kEmpty;
+    }
     if (!row[colId].isList()) {
         return Value::kNullBadType;
     }
diff --git a/tests/tck/features/go/GO.feature b/tests/tck/features/go/GO.feature
index c930d225b..58d39f289 100644
--- a/tests/tck/features/go/GO.feature
+++ b/tests/tck/features/go/GO.feature
@@ -1821,3 +1821,14 @@ Feature: Go Sentence
       """
     Then the result should be, in any order, with relax comparison:
       | like._dst |
+
+  Scenario: with no existed tag
+    When executing query:
+      """
+      GO FROM 'Tony Parker' OVER like YIELD $$.player.name, $^.team.name
+      """
+    Then the result should be, in any order, with relax comparison:
+      | $$.player.name      | $^.team.name |
+      | "LaMarcus Aldridge" | EMPTY        |
+      | "Manu Ginobili"     | EMPTY        |
+      | "Tim Duncan"        | EMPTY        |