From 81afd712741b9bcec55409c6434a08fdfa19d3ca Mon Sep 17 00:00:00 2001
From: wangmm0220 <wangmm0220@gmail.com>
Date: Sat, 18 Sep 2021 18:59:13 +0800
Subject: [PATCH] TD-6129<feature> fix json encode error

---
 src/common/src/tvariant.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/common/src/tvariant.c b/src/common/src/tvariant.c
index 8ca6a0d813..dc7ed1b2cc 100644
--- a/src/common/src/tvariant.c
+++ b/src/common/src/tvariant.c
@@ -892,10 +892,12 @@ int32_t tVariantDumpEx(tVariant *pVariant, char *payload, int16_t type, bool inc
     case TSDB_DATA_TYPE_JSON: {
       if (pVariant->nType == TSDB_DATA_TYPE_NULL) {
         *(int8_t *)payload = TSDB_DATA_TINYINT_NULL;
-      } else if (pVariant->nType != TSDB_DATA_TYPE_BINARY){
-        return -1;
-      } else {
+      } else if (pVariant->nType == TSDB_DATA_TYPE_BINARY){
         *((int8_t *)payload) = TSDB_DATA_BINARY_PLACEHOLDER;
+      } else if (pVariant->nType == TSDB_DATA_TYPE_JSON){   // select * from stable, set tag type to json
+        memcpy(payload, pVariant->pz, pVariant->nLen);
+      } else {
+        return -1;
       }
       break;
     }
-- 
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