From ccb7ba9dccca2861d22de24c8628609b09618990 Mon Sep 17 00:00:00 2001
From: zhli1142015 <zhli@microsoft.com>
Date: Thu, 9 Jan 2025 12:34:45 +0800
Subject: [PATCH] minor change

---
 velox/functions/sparksql/specialforms/FromJson.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/velox/functions/sparksql/specialforms/FromJson.cpp b/velox/functions/sparksql/specialforms/FromJson.cpp
index 0edc8f1e4b4b..c955b3617c71 100644
--- a/velox/functions/sparksql/specialforms/FromJson.cpp
+++ b/velox/functions/sparksql/specialforms/FromJson.cpp
@@ -232,7 +232,7 @@ struct ExtractJsonTypeImpl {
               boost::algorithm::to_lower(key);
             }
             auto it = fieldIndices.find(key);
-            if (it != fieldIndices.end()) {
+            if (it != fieldIndices.end() && it->second >= 0) {
               const auto index = it->second;
               it->second = -1;