From e480a792cd01289e0e94fb19fee93106f713ec58 Mon Sep 17 00:00:00 2001
From: wangmm0220 <wangmm0220@gmail.com>
Date: Fri, 15 Oct 2021 21:06:23 +0800
Subject: [PATCH] TD-6129<feature> support null true false for json tag

---
 src/tsdb/src/tsdbRead.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index f15a53f6f3..904ccd37d6 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -4089,7 +4089,7 @@ static FORCE_INLINE int32_t tsdbGetJsonTagDataFromId(void *param, int32_t id, ch
   } else {
     int16_t colId = 0;
     void* jsonData = getJsonTagValue(pTable, name, TSDB_MAX_JSON_KEY_MD5_LEN, &colId);
-    if(colId == id + 2){      // if find json tag is NULL
+    if(colId == id + 1){      // if find json tag is NULL
       if(jsonData != NULL) *data = NULL;
       else *data = pTable;
       return TSDB_CODE_SUCCESS;
-- 
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