diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index f963a1e6a295b4ffafdaa4f484dab5a78b9d0f5b..b1e2224167ed157376d7b64debbf2e1de7c4be35 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -5296,12 +5296,12 @@ int parseJsontoTagData(char* json, SKVRowBuilder* kvRowBuilder, char* errMsg, in
   tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, nullTypeKey, false);   // add json null type
   if (strtrim(json) == 0 || strcasecmp(json, "null") == 0){
     *(uint8_t*)(varDataVal(nullTypeVal + CHAR_BYTES)) = jsonNULL;
-    tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, &nullTypeVal, true);   // add json null value
+    tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, nullTypeVal, true);   // add json null value
     return TSDB_CODE_SUCCESS;
   }
   int8_t jsonNotNull = TSDB_DATA_JSON_NOT_NULL;
   *(uint8_t*)(varDataVal(nullTypeVal + CHAR_BYTES)) = jsonNotNull;
-  tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, &nullTypeVal, true);   // add json type
+  tdAddColToKVRow(kvRowBuilder, jsonIndex++, TSDB_DATA_TYPE_NCHAR, nullTypeVal, true);   // add json type
 
   // set json real data
   cJSON *root = cJSON_Parse(json);
@@ -5393,7 +5393,7 @@ int parseJsontoTagData(char* json, SKVRowBuilder* kvRowBuilder, char* errMsg, in
 
   if(taosHashGetSize(keyHash) == 0){  // set json NULL true
     *(uint8_t*)(varDataVal(nullTypeVal + CHAR_BYTES)) = jsonNULL;
-    memcpy(POINTER_SHIFT(kvRowBuilder->buf, kvRowBuilder->pColIdx[2].offset), &nullTypeVal, CHAR_BYTES + VARSTR_HEADER_SIZE + CHAR_BYTES);
+    memcpy(POINTER_SHIFT(kvRowBuilder->buf, kvRowBuilder->pColIdx[2].offset), nullTypeVal, CHAR_BYTES + VARSTR_HEADER_SIZE + CHAR_BYTES);
   }
 
 end:
diff --git a/src/tsdb/src/tsdbMeta.c b/src/tsdb/src/tsdbMeta.c
index e6512f24c34d9ff8a3d220ccd68be7890b5e4099..5ba02d373e90662079f0e4ad1d98721685012d9c 100644
--- a/src/tsdb/src/tsdbMeta.c
+++ b/src/tsdb/src/tsdbMeta.c
@@ -1494,26 +1494,12 @@ static void *tsdbDecodeTable(void *buf, STable **pRTable) {
 }
 
 static SArray* getJsonTagTableList(STable *pTable){
-  SArray** pRecord = taosHashIterate(pTable->jsonKeyMap, NULL);
-  SArray* tablist = taosArrayInit(32, sizeof(JsonMapValue));
-
-  while(pRecord){
-    SArray* tallistOld = *pRecord;
-    for (int i = 0; i < taosArrayGetSize(tallistOld); ++i) {    // sort to elimate dumplicate
-      void* element = taosArrayGet(tallistOld, i);
-      void* pFind = taosArraySearch(tablist, element, tsdbCompareJsonMapValue, TD_EQ);
-      if(pFind == NULL){
-        void* p = taosArraySearch(tablist, element, tsdbCompareJsonMapValue, TD_GE);
-        if(p == NULL){
-          taosArrayPush(tablist, element);
-        }else{
-          taosArrayInsert(tablist, TARRAY_ELEM_IDX(tablist, p), element);
-        }
-      }
-    }
-    pRecord = taosHashIterate(pTable->jsonKeyMap, pRecord);
-  }
-  return tablist;
+  uint8_t key = TSDB_DATA_JSON_NULL;
+  char keyMd5[TSDB_MAX_JSON_KEY_MD5_LEN] = {0};
+  jsonKeyMd5(&key, 1, keyMd5);
+  SArray** tablist = (SArray**)taosHashGet(pTable->jsonKeyMap, keyMd5, TSDB_MAX_JSON_KEY_MD5_LEN);
+
+  return *tablist;
 }
 
 static int tsdbGetTableEncodeSize(int8_t act, STable *pTable) {
@@ -1576,7 +1562,6 @@ static int tsdbRemoveTableFromStore(STsdbRepo *pRepo, STable *pTable) {
         ASSERT(TABLE_TYPE((STable *)(p->table)) == TSDB_CHILD_TABLE);
         pBuf = tsdbInsertTableAct(pRepo, TSDB_DROP_META, pBuf, p->table);
       }
-      taosArrayDestroy(tablist);
     }else {
       SSkipListIterator *pIter = tSkipListCreateIter(pTable->pIndex);
       if (pIter == NULL) {
@@ -1609,7 +1594,6 @@ static int tsdbRmTableFromMeta(STsdbRepo *pRepo, STable *pTable) {
         JsonMapValue* p = taosArrayGet(tablist, i);
         tsdbRemoveTableFromMeta(pRepo, p->table, false, false);
       }
-      taosArrayDestroy(tablist);
     }else{
       SSkipListIterator *pIter = tSkipListCreateIter(pTable->pIndex);
       if (pIter == NULL) {
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index c65270ddbd1e73ee78833e9dcbbf8bb63a27aa5f..6dde8ec5457bdccabd129b5bd1238161ed475c52 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -2679,31 +2679,16 @@ static int tsdbReadRowsFromCache(STableCheckInfo* pCheckInfo, TSKEY maxKey, int
 static int32_t getAllTableList(STable* pSuperTable, SArray* list) {
   STSchema* pTagSchema = tsdbGetTableTagSchema(pSuperTable);
   if(pTagSchema && pTagSchema->numOfCols == 1 && pTagSchema->columns[0].type == TSDB_DATA_TYPE_JSON){
-    SArray** pRecord = taosHashIterate(pSuperTable->jsonKeyMap, NULL);
-    SArray* tablist = taosArrayInit(32, sizeof(JsonMapValue));
-
-    while(pRecord){
-      SArray* tallistOld = *pRecord;
-      for (int i = 0; i < taosArrayGetSize(tallistOld); ++i) {    // sort to elimate dumplicate
-        void* element = taosArrayGet(tallistOld, i);
-        void* pFind = taosArraySearch(tablist, element, tsdbCompareJsonMapValue, TD_EQ);
-        if(pFind == NULL){
-          void* p = taosArraySearch(tablist, element, tsdbCompareJsonMapValue, TD_GE);
-          if(p == NULL){
-            taosArrayPush(tablist, element);
-          }else{
-            taosArrayInsert(tablist, TARRAY_ELEM_IDX(tablist, p), element);
-          }
-        }
-      }
-      pRecord = taosHashIterate(pSuperTable->jsonKeyMap, pRecord);
-    }
-    for (int i = 0; i < taosArrayGetSize(tablist); ++i) {
-      JsonMapValue* p = taosArrayGet(tablist, i);
+    uint8_t key = TSDB_DATA_JSON_NULL;
+    char keyMd5[TSDB_MAX_JSON_KEY_MD5_LEN] = {0};
+    jsonKeyMd5(&key, 1, keyMd5);
+    SArray** tablist = (SArray**)taosHashGet(pSuperTable->jsonKeyMap, keyMd5, TSDB_MAX_JSON_KEY_MD5_LEN);
+
+    for (int i = 0; i < taosArrayGetSize(*tablist); ++i) {
+      JsonMapValue* p = taosArrayGet(*tablist, i);
       STableKeyInfo info = {.pTable = p->table, .lastKey = TSKEY_INITIAL_VAL};
       taosArrayPush(list, &info);
     }
-    taosArrayDestroy(tablist);
   }else{
     SSkipListIterator* iter = tSkipListCreateIter(pSuperTable->pIndex);
     while (tSkipListIterNext(iter)) {
diff --git a/src/util/src/tutil.c b/src/util/src/tutil.c
index 4845da626bc9015c0974c06bd9c390b63adfc1a5..dc242ea72cc2cebe827a674e1ac02400c752f687 100644
--- a/src/util/src/tutil.c
+++ b/src/util/src/tutil.c
@@ -470,9 +470,8 @@ bool isValidateTag(char *input) {
   if (!input) return false;
   int len = strlen(input);
   if (len == 0) return false;
-  if (input[0] != '_' && isalpha(input[0]) == 0) return false;
   for (int i = 1; i < len; ++i) {
-    if (input[i] != '_' && isalnum(input[i]) == 0) return false;
+    if (isprint(input[i]) == 0) return false;
   }
   return true;
 }
diff --git a/tests/pytest/stable/json_tag.py b/tests/pytest/stable/json_tag.py
index e48f340d59f34af551e513cba7b3cf6800dddbf6..2151f5f0d5cc23c887147c6d0b7333dc54424b30 100644
--- a/tests/pytest/stable/json_tag.py
+++ b/tests/pytest/stable/json_tag.py
@@ -243,6 +243,17 @@ class TDTestCase:
         tdSql.query("select tbname,jtag from db_json_tag_test.jsons1 where jtag->'k1'='中国'")
         tdSql.checkRows(1)
 
+        #test dumplicate key with normal colomn
+        tdSql.execute("INSERT INTO db_json_tag_test.jsons1_12 using db_json_tag_test.jsons1 tags('{\"tbname\":\"tt\",\"databool\":true,\"dataStr\":\"是是是\"}') values(now, 4, false, \"你就会\")")
+
+        tdSql.query("select *,tbname,jtag from db_json_tag_test.jsons1 where jtag->'dataStr' match '是'")
+        tdSql.checkRows(1)
+
+        tdSql.query("select tbname,jtag->'tbname' from db_json_tag_test.jsons1 where jtag->'tbname'='tt'")
+        tdSql.checkRows(1)
+
+        tdSql.query("select *,tbname,jtag from db_json_tag_test.jsons1 where dataBool=true")
+        tdSql.checkRows(2)
     def stop(self):
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)