diff --git a/src/client/src/tscParseInsert.c b/src/client/src/tscParseInsert.c
index 767fbf26eae4e9ae3455a5ea6b7d609de0fd6f04..24562e7890ed13914dcd55d7df505a59ac191881 100644
--- a/src/client/src/tscParseInsert.c
+++ b/src/client/src/tscParseInsert.c
@@ -1098,30 +1098,19 @@ static int32_t tscCheckIfCreateTable(char **sqlstr, SSqlObj *pSql, char** boundC
         if (TK_STRING == sToken.type) free(sToken.z);
       }
     }
+    tscDestroyBoundColumnInfo(&spd);
 
     SKVRow row = tdGetKVRowFromBuilder(&kvRowBuilder);
     tdDestroyKVRowBuilder(&kvRowBuilder);
     if (row == NULL) {
-      tscDestroyBoundColumnInfo(&spd);
       return tscSQLSyntaxErrMsg(pInsertParam->msg, "tag value expected", NULL);
     }
     tdSortKVRowByColIdx(row);
 
     pInsertParam->tagData.dataLen = kvRowLen(row);
     if (pInsertParam->tagData.dataLen <= 0){
-      tscDestroyBoundColumnInfo(&spd);
       return tscSQLSyntaxErrMsg(pInsertParam->msg, "tag value expected", NULL);
     }
-    // encode json tag string
-    if(spd.numOfBound == 1 && pTagSchema[spd.boundedColumns[0]].type == TSDB_DATA_TYPE_JSON){
-      if(kvRowLen(row) >= pTagSchema[spd.boundedColumns[0]].bytes){   // reserve 1 byte for select
-        char tmp[128]= {0};
-        sprintf(tmp, "tag value is too small, can not contain encoded json tag:%d|%d", kvRowLen(row), pTagSchema[spd.boundedColumns[0]].bytes);
-        tscDestroyBoundColumnInfo(&spd);
-        return tscInvalidOperationMsg(pInsertParam->msg, tmp, NULL);
-      }
-    }
-    tscDestroyBoundColumnInfo(&spd);
 
     char* pTag = realloc(pInsertParam->tagData.data, pInsertParam->tagData.dataLen);
     if (pTag == NULL) {
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 7a22be880cec77c0cc0e09a495f4f6ada1184562..18aa629906793799fff838c0125f9cb4ed0f8162 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -7745,11 +7745,6 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
           } else if (pItem->pVar.nType == TSDB_DATA_TYPE_TIMESTAMP) {
             pItem->pVar.i64 = convertTimePrecision(pItem->pVar.i64, TSDB_TIME_PRECISION_NANO, tinfo.precision);
           }
-        } else if (pSchema->type == TSDB_DATA_TYPE_JSON) {
-          if (pItem->pVar.nLen > pSchema->bytes) {
-            tdDestroyKVRowBuilder(&kvRowBuilder);
-            return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
-          }
         }
         ret = tVariantDump(&(pItem->pVar), tagVal, pSchema->type, true);
 
@@ -7802,14 +7797,6 @@ int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo) {
     }
     tdSortKVRowByColIdx(row);
     pTag->dataLen = kvRowLen(row);
-    if(schemaSize == 1 && pTagSchema[0].type == TSDB_DATA_TYPE_JSON){
-      if(kvRowLen(row) >= pTagSchema[0].bytes){   // reserve 1 byte for select
-        char tmp[128]= {0};
-        sprintf(tmp, "tag value is too small, can not contain encoded json tag:%d|%d", kvRowLen(row), pTagSchema[0].bytes);
-        free(row);
-        return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), tmp);
-      }
-    }
 
     if (pTag->data == NULL) {
       pTag->data = malloc(pTag->dataLen);
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 32c683445abca6d25312a766795549021aae328e..31759e6b9a8f4506a24a69fcda6d8693a453737a 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -5191,10 +5191,10 @@ void getJsonTagValueAll(void* data, void* dst, int16_t bytes) {
     return;
   }
 
-  assert(strlen(json) <= bytes);
   int32_t length = 0;
   taosMbsToUcs4(json, strlen(json), varDataVal(dst), bytes - VARSTR_HEADER_SIZE, &length);
   varDataSetLen(dst, length);
+  assert(length <= bytes);
   tfree(json);
 }