diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index b6fbc72471bbda0ccffb43b14fb80927ef544c79..7f35cf0ea5080cbb49db3a78b7d53df58cb9724c 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -80,7 +80,6 @@ typedef struct SInternalField {
   TAOS_FIELD      field;
   bool            visible;
   SExprInfo      *pExpr;
-  TAOS_FIELD      fieldJson;  // for tag json
 } SInternalField;
 
 typedef struct SParamInfo {
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 7016eec367dfe11931e14c991705db5240645a9c..a9770febf7e0aefbba6f9c2e5569529c12f10a7c 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -1910,29 +1910,20 @@ static void addProjectQueryCol(SQueryInfo* pQueryInfo, int32_t startPos, SColumn
 
   SSchema* pSchema = tscGetTableColumnSchema(pTableMeta, pIndex->columnIndex);
 
-  char* oriAliasName1 = NULL;
-  char oriAliasName2[TSDB_COL_NAME_LEN + TSDB_TABLE_NAME_LEN + TSDB_MAX_JSON_KEY_LEN + 4 + 1] = {0};
   if (pSchema->type == TSDB_DATA_TYPE_JSON && pItem->pNode->tokenId == TK_ARROW) {
-    char keyMd5[TSDB_MAX_JSON_KEY_MD5_LEN + 1] = {0};
-    if (pItem->aliasName){
-      jsonKeyMd5(pItem->aliasName, strlen(pItem->aliasName), keyMd5);
-      oriAliasName1 = pItem->aliasName;
-    }else{
-      jsonKeyMd5(pItem->pNode->exprToken.z, pItem->pNode->exprToken.n, keyMd5);
-      tstrncpy(oriAliasName2, pItem->pNode->exprToken.z,
-               pItem->pNode->exprToken.n + 1 < sizeof(oriAliasName2) ? pItem->pNode->exprToken.n + 1 : sizeof(oriAliasName2));
-    }
-    tstrncpy(pExpr->base.aliasName, keyMd5, sizeof(pExpr->base.aliasName));
-  } else {
     if (pItem->aliasName){
       tstrncpy(pExpr->base.aliasName, pItem->aliasName, sizeof(pExpr->base.aliasName));
-      oriAliasName1 = pItem->aliasName;
     }else{
-      tstrncpy(pExpr->base.aliasName, pSchema->name, sizeof(pExpr->base.aliasName));
-      oriAliasName1 = pSchema->name;
+      tstrncpy(pExpr->base.aliasName, pItem->pNode->exprToken.z,
+               pItem->pNode->exprToken.n + 1 < sizeof(pExpr->base.aliasName) ? pItem->pNode->exprToken.n + 1 : sizeof(pExpr->base.aliasName));
     }
-  }
+    char* colName = (pItem->aliasName == NULL) ? pSchema->name : pItem->aliasName;
+    tstrncpy(pExpr->base.aliasName, colName, sizeof(pExpr->base.aliasName));
 
+  }else{
+    char* colName = (pItem->aliasName == NULL) ? pSchema->name : pItem->aliasName;
+    tstrncpy(pExpr->base.aliasName, colName, sizeof(pExpr->base.aliasName));
+  }
   SColumnList ids = {0};
   ids.num = 1;
   ids.ids[0] = *pIndex;
@@ -1942,7 +1933,7 @@ static void addProjectQueryCol(SQueryInfo* pQueryInfo, int32_t startPos, SColumn
     ids.num = 0;
   }
 
-  insertResultField(pQueryInfo, startPos, &ids, pExpr->base.resBytes, (int8_t)pExpr->base.resType, oriAliasName1 ? oriAliasName1 : oriAliasName2, pExpr);
+  insertResultField(pQueryInfo, startPos, &ids, pExpr->base.resBytes, (int8_t)pExpr->base.resType, pExpr->base.aliasName, pExpr);
 }
 
 static void addPrimaryTsColIntoResult(SQueryInfo* pQueryInfo, SSqlCmd* pCmd) {
@@ -2195,12 +2186,6 @@ int32_t insertResultField(SQueryInfo* pQueryInfo, int32_t outputIndex, SColumnLi
   
   TAOS_FIELD f = tscCreateField(type, fieldName, bytes);
   SInternalField* pInfo = tscFieldInfoInsert(&pQueryInfo->fieldsInfo, outputIndex, &f);
-  if (type == TSDB_DATA_TYPE_JSON){
-    char keyMd5[TSDB_MAX_JSON_KEY_MD5_LEN + 1] = {0};
-    jsonKeyMd5(fieldName, strlen(fieldName), keyMd5);
-    strncpy(pInfo->fieldJson.name, keyMd5, sizeof(pInfo->fieldJson.name));
-    pInfo->fieldJson.type = TSDB_DATA_TYPE_JSON;
-  }
   pInfo->pExpr = pSqlExpr;
   
   return TSDB_CODE_SUCCESS;
@@ -7527,20 +7512,15 @@ static int32_t doAddGroupbyColumnsOnDemand(SSqlCmd* pCmd, SQueryInfo* pQueryInfo
       insertResultField(pQueryInfo, pos, &ids, s->bytes, (int8_t)s->type, pColIndex->name, pExpr);
       pExpr->base.colInfo.flag = TSDB_COL_TAG;
       memset(pExpr->base.aliasName, 0, sizeof(pExpr->base.aliasName));
+      tstrncpy(pExpr->base.aliasName, pColIndex->name, sizeof(pExpr->base.aliasName));
+      tstrncpy(pExpr->base.token, pColIndex->name, sizeof(pExpr->base.token));
       if(s->type == TSDB_DATA_TYPE_JSON){
         SStrToken t0 = {.z = pColIndex->name};
         getJsonKey(&t0);
         tVariantCreateFromBinary(&(pExpr->base.param[pExpr->base.numOfParams]), t0.z,
                                  t0.n, TSDB_DATA_TYPE_BINARY);
         pExpr->base.numOfParams++;
-        char keyMd5[TSDB_MAX_JSON_KEY_MD5_LEN + 1] = {0};
-        jsonKeyMd5(pColIndex->name, strlen(pColIndex->name), keyMd5);
-        tstrncpy(pExpr->base.aliasName, keyMd5, sizeof(pExpr->base.aliasName));
-        tstrncpy(pExpr->base.token, keyMd5, sizeof(pExpr->base.token));
         tstrncpy(pColIndex->name, t0.z, t0.n + 1);
-      }else {
-        tstrncpy(pExpr->base.aliasName, s->name, sizeof(pExpr->base.aliasName));
-        tstrncpy(pExpr->base.token, s->name, sizeof(pExpr->base.aliasName));
       }
     } else {
       // if this query is "group by" normal column, time window query is not allowed
diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 9224a13c25ce77dbbb5804f0a7bfc7ae4e57a6f7..2e1b480fb15eb72a7b6d228a7d72737b65f61156 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -855,7 +855,6 @@ static int32_t serializeSqlExpr(SSqlExpr* pExpr, STableMetaInfo* pTableMetaInfo,
   pSqlExpr->numOfParams = htons(pExpr->numOfParams);
   pSqlExpr->resColId    = htons(pExpr->resColId);
   pSqlExpr->flist.numOfFilters = htons(pExpr->flist.numOfFilters);
-  tstrncpy(pSqlExpr->aliasName, pExpr->aliasName, TSDB_COL_NAME_LEN);
 
   (*pMsg) += sizeof(SSqlExpr);
   for (int32_t j = 0; j < pExpr->numOfParams; ++j) { // todo add log
@@ -2644,38 +2643,12 @@ int tscProcessShowCreateRsp(SSqlObj *pSql) {
   return tscLocalResultCommonBuilder(pSql, 1);
 }
 
-static void updateFieldForJson(SSqlObj *pSql, SQueryTableRsp *pQueryAttr){
-  if(pQueryAttr->tJsonSchLen <= 0) {
-    return;
-  }
-
-  SQueryInfo *pQueryInfo = tscGetQueryInfo(&pSql->cmd);
-  SFieldInfo *pFieldInfo = &pQueryInfo->fieldsInfo;
-  for(int32_t i = 0; i < pFieldInfo->numOfOutput; ++i) {
-    SInternalField *pField = tscFieldInfoGetInternalField(pFieldInfo, i);
-
-    if (pField->field.type == TSDB_DATA_TYPE_JSON) {
-      for (int k = 0; k < pQueryAttr->tJsonSchLen; ++k) {
-        if (strncmp(pField->fieldJson.name, pQueryAttr->tagJsonSchema[k].name, TSDB_MAX_JSON_KEY_LEN) == 0
-            && pQueryAttr->tagJsonSchema[k].type != TSDB_DATA_TYPE_JSON) {
-          pField->fieldJson.type = pQueryAttr->tagJsonSchema[k].type;
-          pField->fieldJson.bytes = TYPE_BYTES[pField->fieldJson.type];
-          tscDebug("0x%" PRIx64 " change json type %s:%s to %d", pSql->self, pField->field.name, pQueryAttr->tagJsonSchema[k].name,
-                   pField->fieldJson.type);
-          break;
-        }
-      }
-    }
-  }
-}
-
 int tscProcessQueryRsp(SSqlObj *pSql) {
   SSqlRes *pRes = &pSql->res;
 
   SQueryTableRsp *pQueryAttr = (SQueryTableRsp *)pRes->pRsp;
   pQueryAttr->qId = htobe64(pQueryAttr->qId);
-  pQueryAttr->tJsonSchLen = htons(pQueryAttr->tJsonSchLen);
-  updateFieldForJson(pSql, pQueryAttr);
+
   pRes->qId  = pQueryAttr->qId;
   pRes->data = NULL;
 
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 37482389f81bfba3734a36ac00752f612eae9b30..6b43eacd83c1cffac84d30c8c05c57d84688bcbb 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -439,12 +439,6 @@ TAOS_FIELD *taos_fetch_fields(TAOS_RES *res) {
       if (pField->visible) {
         f[j] = pField->field;
 
-        if(f[j].type == TSDB_DATA_TYPE_JSON){
-          f[j].type = pField->fieldJson.type;
-          if(!IS_VAR_DATA_TYPE(f[j].type) && f[j].type != TSDB_DATA_TYPE_JSON){
-            f[j].bytes = pField->fieldJson.bytes;
-          }
-        }
         // revise the length for binary and nchar fields
         if (f[j].type == TSDB_DATA_TYPE_BINARY) {
           f[j].bytes -= VARSTR_HEADER_SIZE;
diff --git a/src/client/src/tscSubquery.c b/src/client/src/tscSubquery.c
index 6f8098d8d5c9820bb7c8e3bca29297cf7a3234b9..15119281e289485bac5c146de170767174407f6b 100644
--- a/src/client/src/tscSubquery.c
+++ b/src/client/src/tscSubquery.c
@@ -3686,10 +3686,6 @@ TAOS_ROW doSetResultRowData(SSqlObj *pSql) {
 
     int32_t type  = pInfo->field.type;
     int32_t bytes = pInfo->field.bytes;
-    if(type == TSDB_DATA_TYPE_JSON && pInfo->fieldJson.type != TSDB_DATA_TYPE_JSON){
-      type = pInfo->fieldJson.type;
-      bytes = pInfo->fieldJson.bytes;
-    }
 
     if (!IS_VAR_DATA_TYPE(type) && type != TSDB_DATA_TYPE_JSON) {
       pRes->tsrow[j] = isNull(pRes->urow[i], type) ? NULL : pRes->urow[i];
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 1f5f35c4e3b12a5c2ad006f1c9ca661e37430ccf..67da9885c079980f5ca50b638e31a3ba64ac0877 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -701,45 +701,7 @@ int32_t tscCreateResPointerInfo(SSqlRes* pRes, SQueryInfo* pQueryInfo) {
 
 static void setResRawPtrImpl(SSqlRes* pRes, SInternalField* pInfo, int32_t i, bool convertNchar) {
   // generated the user-defined column result
-  if (pInfo->field.type == TSDB_DATA_TYPE_JSON){
-    char* buffer = realloc(pRes->buffer[i], pInfo->field.bytes * pRes->numOfRows);
-    if (buffer == NULL) return;
-    pRes->buffer[i] = buffer;
-    // string terminated char for binary data
-    memset(pRes->buffer[i], 0, pInfo->field.bytes * pRes->numOfRows);
-
-    char* p = pRes->urow[i];
-    int32_t offset = 0;
-    for (int32_t k = 0; k < pRes->numOfRows; ++k) {
-      char* dst = pRes->buffer[i] + k * offset;
-      char* realData = p + CHAR_BYTES;
-      char type = *p;
-
-      if (type == TSDB_DATA_TYPE_JSON && isNull(realData, TSDB_DATA_TYPE_JSON)) {
-        type = pInfo->fieldJson.type;
-        setNull(realData, type, 0);
-      }
-      if (type == TSDB_DATA_TYPE_NCHAR || type == TSDB_DATA_TYPE_JSON) {
-        if(convertNchar && !isNull(realData, TSDB_DATA_TYPE_NCHAR)){
-          int32_t length = taosUcs4ToMbs(varDataVal(realData), varDataLen(realData), varDataVal(dst));
-          varDataSetLen(dst, length);
-          if (length == 0) {
-            tscError("charset:%s to %s. val:%s convert failed.", DEFAULT_UNICODE_ENCODEC, tsCharset, (char*)varDataVal(realData));
-          }
-        }else{
-          memcpy(dst, realData, varDataTLen(realData));
-        }
-        offset = pInfo->field.bytes;
-      }else {
-        assert(type <= TSDB_DATA_TYPE_DOUBLE && type >=TSDB_DATA_TYPE_BOOL);
-        memcpy(dst, realData, tDataTypes[(int32_t)type].bytes);
-        offset = tDataTypes[(int32_t)type].bytes;
-      }
-
-      p += pInfo->field.bytes;
-    }
-    memcpy(pRes->urow[i], pRes->buffer[i], pInfo->field.bytes * pRes->numOfRows);
-  }else if (pInfo->pExpr->pExpr == NULL && TSDB_COL_IS_UD_COL(pInfo->pExpr->base.colInfo.flag)) {
+  if (pInfo->pExpr->pExpr == NULL && TSDB_COL_IS_UD_COL(pInfo->pExpr->base.colInfo.flag)) {
     if (pInfo->pExpr->base.param[0].nType == TSDB_DATA_TYPE_NULL) {
       setNullN(pRes->urow[i], pInfo->field.type, pInfo->field.bytes, (int32_t) pRes->numOfRows);
     } else {
@@ -788,6 +750,50 @@ static void setResRawPtrImpl(SSqlRes* pRes, SInternalField* pInfo, int32_t i, bo
       p += pInfo->field.bytes;
     }
     memcpy(pRes->urow[i], pRes->buffer[i], pInfo->field.bytes * pRes->numOfRows);
+  }else if (pInfo->field.type == TSDB_DATA_TYPE_JSON) {
+      // convert unicode to native code in a temporary buffer extra one byte for terminated symbol
+      char* buffer = realloc(pRes->buffer[i], pInfo->field.bytes * pRes->numOfRows);
+      if (buffer == NULL) return;
+      pRes->buffer[i] = buffer;
+      // string terminated char for binary data
+      memset(pRes->buffer[i], 0, pInfo->field.bytes * pRes->numOfRows);
+
+      char* p = pRes->urow[i];
+      for (int32_t k = 0; k < pRes->numOfRows; ++k) {
+        char* dst = pRes->buffer[i] + k * pInfo->field.bytes;
+        char type = *p;
+        char* realData = p + CHAR_BYTES;
+        if (type == TSDB_DATA_TYPE_NCHAR && isNull(realData, TSDB_DATA_TYPE_NCHAR)) {
+          memcpy(dst, realData, varDataTLen(realData));
+        } else if (type == TSDB_DATA_TYPE_BINARY) {
+          assert(*(uint32_t*)varDataVal(realData) == TSDB_DATA_JSON_null);   // json null value
+          assert(varDataLen(realData) == INT_BYTES);
+          sprintf(varDataVal(dst), "%s", "null");
+          varDataSetLen(dst, strlen(varDataVal(dst)));
+        }else if (type == TSDB_DATA_TYPE_NCHAR) {
+          int32_t length = taosUcs4ToMbs(varDataVal(realData), varDataLen(realData), varDataVal(dst));
+          varDataSetLen(dst, length);
+          if (length == 0) {
+            tscError("charset:%s to %s. val:%s convert failed.", DEFAULT_UNICODE_ENCODEC, tsCharset, (char*)p);
+          }
+        }else if (type == TSDB_DATA_TYPE_DOUBLE) {
+          double jsonVd = *(double*)(realData);
+          sprintf(varDataVal(dst), "%.9lf", jsonVd);
+          varDataSetLen(dst, strlen(varDataVal(dst)));
+        }else if (type == TSDB_DATA_TYPE_BIGINT) {
+          int64_t jsonVd = *(int64_t*)(realData);
+          sprintf(varDataVal(dst), "%" PRId64, jsonVd);
+          varDataSetLen(dst, strlen(varDataVal(dst)));
+        }else if (type == TSDB_DATA_TYPE_BOOL) {
+          sprintf(varDataVal(dst), "%s", (*((char *)realData) == 1) ? "true" : "false");
+          varDataSetLen(dst, strlen(varDataVal(dst)));
+        }else {
+          assert(0);
+        }
+
+        p += pInfo->field.bytes;
+      }
+      memcpy(pRes->urow[i], pRes->buffer[i], pInfo->field.bytes * pRes->numOfRows);
   }
 
   if (convertNchar) {
diff --git a/src/inc/query.h b/src/inc/query.h
index 67042764fefb74008be7cbcc387e8d89d542263b..0872e3dbaa517ded77dd758b30e69f273c13a580 100644
--- a/src/inc/query.h
+++ b/src/inc/query.h
@@ -28,7 +28,7 @@ typedef void* qinfo_t;
  * @param qinfo
  * @return
  */
-int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryTableMsg, qinfo_t* qinfo, uint64_t qId, void** tJsonSchema);
+int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryTableMsg, qinfo_t* qinfo, uint64_t qId);
 
 
 /**
diff --git a/src/inc/taosdef.h b/src/inc/taosdef.h
index 444362b53f06a93d06984b10cecf5f52ebe69079..bf4796a87c5260d5f6c7f241bfbfdc63ff084c9f 100644
--- a/src/inc/taosdef.h
+++ b/src/inc/taosdef.h
@@ -227,7 +227,7 @@ do { \
 #define TSDB_MAX_JSON_TAGS_LEN    (4096*TSDB_NCHAR_SIZE + 2 + 1) // 2->var_header_len 1->type
 #define TSDB_MAX_TAGS             128
 #define TSDB_MAX_TAG_CONDITIONS   1024
-#define TSDB_MAX_JSON_KEY_LEN     65
+#define TSDB_MAX_JSON_KEY_LEN     256
 #define TSDB_MAX_JSON_KEY_MD5_LEN 16
 
 #define TSDB_AUTH_LEN             16
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index 6ec0be52a39fd0b2ee7ca7d792a9f283a7af7c6e..da38925764faa32a9a71f3e5aefaa8fa16ec81da 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -258,11 +258,6 @@ typedef struct SSchema {
   int16_t bytes;
 } SSchema;
 
-typedef struct TagJsonSSchema {
-  uint8_t type;
-  char    name[TSDB_MAX_JSON_KEY_LEN];
-} TagJsonSSchema;
-
 typedef struct {
   int32_t  contLen;
   int32_t  vgId;
@@ -519,8 +514,6 @@ typedef struct {
 typedef struct {
   int32_t  code;
   union{uint64_t qhandle; uint64_t qId;}; // query handle
-  uint16_t tJsonSchLen;
-  TagJsonSSchema tagJsonSchema[];
 } SQueryTableRsp;
 
 // todo: the show handle should be replaced with id
diff --git a/src/inc/tsdb.h b/src/inc/tsdb.h
index a4d73a84e1d33cff6cf83b29e80323418a0f31b8..a90780b202c6a88ab4f6ced3b5896f48ffc2538b 100644
--- a/src/inc/tsdb.h
+++ b/src/inc/tsdb.h
@@ -419,8 +419,6 @@ int tsdbCompact(STsdbRepo *pRepo);
 bool tsdbNoProblem(STsdbRepo* pRepo);
 // unit of walSize: MB
 int tsdbCheckWal(STsdbRepo *pRepo, uint32_t walSize);
-// for tag json
-uint8_t getTagJsonType(STsdbRepo* tsdb, uint64_t uid, char* key, int32_t len);
 
 #ifdef __cplusplus
 }
diff --git a/src/query/src/queryMain.c b/src/query/src/queryMain.c
index e8d147d5398121d82c5f7860901eb78567cca087..fce7f649892f87d075c8dd64e4d1160e5d05bf77 100644
--- a/src/query/src/queryMain.c
+++ b/src/query/src/queryMain.c
@@ -67,39 +67,7 @@ void freeParam(SQueryParam *param) {
   tfree(param->prevResult);
 }
 
-static void* setJsonTagSchema(void* tsdb, int16_t numOfOutput, SExprInfo *pExprs, SArray* pTableIdList){
-  uint16_t cnt = 0;
-  for (int i = 0; i < numOfOutput; ++i) {
-    SSqlExpr* sqlExpr = &pExprs[i].base;
-    if (sqlExpr->colType == TSDB_DATA_TYPE_JSON && sqlExpr->numOfParams > 0) {
-      cnt ++;
-    }
-  }
-  if(cnt <= 0) return NULL;
-  void* tJsonSchData = calloc(1, SHORT_BYTES + cnt*sizeof(TagJsonSSchema));
-  *(uint16_t*)(tJsonSchData) = cnt;
-  void* tmp = tJsonSchData + SHORT_BYTES;
-  for (int i = 0; i < numOfOutput; ++i) {
-    SSqlExpr* sqlExpr = &pExprs[i].base;
-    if (sqlExpr->colType == TSDB_DATA_TYPE_JSON && sqlExpr->numOfParams > 0){
-      TagJsonSSchema* schema = (TagJsonSSchema*)(tmp);
-      schema->type = TSDB_DATA_TYPE_JSON;
-      tstrncpy(schema->name, sqlExpr->aliasName, TSDB_MAX_JSON_KEY_LEN);
-      for (int j = 0; j < taosArrayGetSize(pTableIdList); ++j) {
-        STableIdInfo *id = taosArrayGet(pTableIdList, j);
-        uint8_t type = getTagJsonType(tsdb, id->uid, sqlExpr->param[0].pz, sqlExpr->param[0].nLen);
-        if(type != TSDB_DATA_TYPE_JSON) {
-          schema->type = type;
-          break;
-        }
-      }
-      tmp += sizeof(TagJsonSSchema);
-    }
-  }
-  return tJsonSchData;
-}
-
-int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, qinfo_t* pQInfo, uint64_t qId, void** tJsonSchema) {
+int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, qinfo_t* pQInfo, uint64_t qId) {
   assert(pQueryMsg != NULL && tsdb != NULL);
 
   int32_t code = TSDB_CODE_SUCCESS;
@@ -200,7 +168,7 @@ int32_t qCreateQueryInfo(void* tsdb, int32_t vgId, SQueryTableMsg* pQueryMsg, qi
   assert(pQueryMsg->stableQuery == isSTableQuery);
   (*pQInfo) = createQInfoImpl(pQueryMsg, param.pGroupbyExpr, param.pExprs, param.pSecExprs, &tableGroupInfo,
                               param.pTagColumnInfo, param.pFilters, vgId, param.sql, qId, param.pUdfInfo);
-  *tJsonSchema = setJsonTagSchema(tsdb, pQueryMsg->numOfOutput, param.pExprs, param.pTableIdList);
+
   param.sql    = NULL;
   param.pExprs = NULL;
   param.pSecExprs = NULL;
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 37dd692a15df02710660821145ea3d5a576dd582..145da28e2e881f14fdfb37594eae3d5f68499bf0 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -4112,16 +4112,5 @@ static int32_t tsdbQueryTableList(STable* pTable, SArray* pRes, void* filterInfo
   return TSDB_CODE_SUCCESS;
 }
 
-uint8_t getTagJsonType(STsdbRepo* tsdb, uint64_t uid, char* key, int32_t len){
-  STable* pTable = tsdbGetTableByUid(tsdbGetMeta(tsdb), uid);
-  void* result = getJsonTagValueElment(pTable, key, len, NULL, TSDB_MAX_JSON_TAGS_LEN);
-  if(result){
-    return *(char*)result;
-  }else{
-    return TSDB_DATA_TYPE_JSON;
-  }
-}
-
-
 
 
diff --git a/src/vnode/src/vnodeRead.c b/src/vnode/src/vnodeRead.c
index f9d61c5b37579c04585c1bd921d9a218ce567cd1..e8495cac6d7de10018757876fba3674bda0e6231 100644
--- a/src/vnode/src/vnodeRead.c
+++ b/src/vnode/src/vnodeRead.c
@@ -239,25 +239,14 @@ static int32_t vnodeProcessQueryMsg(SVnodeObj *pVnode, SVReadMsg *pRead) {
   if (contLen != 0) {
     qinfo_t pQInfo = NULL;
     uint64_t qId = genQueryId();
-    void* tJsonSchema = NULL;
-    code = qCreateQueryInfo(pVnode->tsdb, pVnode->vgId, pQueryTableMsg, &pQInfo, qId, &tJsonSchema);
+    code = qCreateQueryInfo(pVnode->tsdb, pVnode->vgId, pQueryTableMsg, &pQInfo, qId);
 
-    int extSize = 0;
-    if (tJsonSchema != NULL){
-      uint16_t cnt = *(uint16_t*)tJsonSchema;
-      extSize = cnt * sizeof(TagJsonSSchema);
-    }
-    SQueryTableRsp *pRsp = (SQueryTableRsp *)rpcMallocCont(sizeof(SQueryTableRsp) + extSize);
+    SQueryTableRsp *pRsp = (SQueryTableRsp *)rpcMallocCont(sizeof(SQueryTableRsp));
     pRsp->code = code;
     pRsp->qId  = 0;
 
-    pRet->len = sizeof(SQueryTableRsp) + extSize;
+    pRet->len = sizeof(SQueryTableRsp);
     pRet->rsp = pRsp;
-    if (tJsonSchema != NULL){
-      pRsp->tJsonSchLen = htons(*(uint16_t*)tJsonSchema);
-      memcpy(pRsp->tagJsonSchema, tJsonSchema + SHORT_BYTES, extSize);
-      tfree(tJsonSchema);
-    }
     int32_t vgId = pVnode->vgId;
 
     // current connect is broken
diff --git a/tests/pytest/stable/json_tag.py b/tests/pytest/stable/json_tag.py
index 78c63b10eb72405476871e7126b28b1cc3da1295..d953526ec403a3132121a0c3669e23c443d58163 100644
--- a/tests/pytest/stable/json_tag.py
+++ b/tests/pytest/stable/json_tag.py
@@ -194,7 +194,7 @@ class TDTestCase:
         tdSql.checkData(0, 0, "{\"k1\":\"\",\"k2\":true,\"k3\":false,\"k4\":55}")
 
         tdSql.query("select jtag->'k2' from db_json_tag_test.jsons1_10")
-        tdSql.checkData(0, 0, True)
+        tdSql.checkData(0, 0, "true")
 
         tdSql.query("select jtag from db_json_tag_test.jsons1 where jtag->'k1'=''")
         tdSql.checkRows(1)