diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 6b80257e255f852662bac280b8f12b3cb03c1a91..c2f293bbca527208b55e8a5288511b5d61309dfc 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -4249,7 +4249,7 @@ static void exchangeExpr(tSqlExpr* pExpr) {
   tSqlExpr* pLeft  = pExpr->pLeft;
   tSqlExpr* pRight = pExpr->pRight;
 
-  if (pRight->tokenId == TK_ID && (pLeft->tokenId == TK_INTEGER || pLeft->tokenId == TK_FLOAT ||
+  if ((pRight->tokenId == TK_ID || pRight->tokenId == TK_ARROW) && (pLeft->tokenId == TK_INTEGER || pLeft->tokenId == TK_FLOAT ||
                                     pLeft->tokenId == TK_STRING || pLeft->tokenId == TK_BOOL)) {
     /*
      * exchange value of the left handside and the value of the right-handside
@@ -4487,6 +4487,8 @@ static int32_t handleExprInQueryCond(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSql
   const char* msg2 = "illegal column name";
   const char* msg4 = "too many join tables";
   const char* msg5 = "not support ordinary column join";
+  const char* msg6 = "not support json tag column filter";
+  const char* msg7 = "tag json key is too long, exceed to 64";
 
   tSqlExpr* pLeft  = (*pExpr)->pLeft;
   tSqlExpr* pRight = (*pExpr)->pRight;
@@ -4603,6 +4605,15 @@ static int32_t handleExprInQueryCond(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSql
       return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg1);
     }
 
+    if (pSchema->type == TSDB_DATA_TYPE_JSON && pLeft != NULL && (pLeft->tokenId == TK_ID)){
+      return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg6);
+    }
+
+    if (pSchema->type == TSDB_DATA_TYPE_JSON && pLeft != NULL && (pLeft->tokenId == TK_ARROW)){
+      if(pLeft->pRight && pLeft->pRight->value.nLen >= TSDB_COL_NAME_LEN)
+        return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg7);
+    }
+
     if (pRight != NULL && pRight->tokenId == TK_ID) {  // join on tag columns for stable query
       if (!validateJoinExprNode(pCmd, pQueryInfo, *pExpr, &index)) {
         return TSDB_CODE_TSC_INVALID_OPERATION;
@@ -4621,8 +4632,7 @@ static int32_t handleExprInQueryCond(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, tSql
       tSqlExpr *rexpr = NULL;
       if ((*pExpr)->tokenId == TK_NE && (pSchema->type != TSDB_DATA_TYPE_BINARY
                                          && pSchema->type != TSDB_DATA_TYPE_NCHAR
-                                         && pSchema->type != TSDB_DATA_TYPE_BOOL
-                                         && pSchema->type != TSDB_DATA_TYPE_JSON)) {
+                                         && pSchema->type != TSDB_DATA_TYPE_BOOL)) {
         handleNeOptr(&rexpr, *pExpr);
         *pExpr = rexpr;
       }
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index 05d7d5f3534e23b05d6f9e0dce234eb4b950adf0..e2e5f9c5eab60ec7f59836306d74c19912b4009b 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -5330,6 +5330,12 @@ int parseJsontoTagData(char* json, SKVRowBuilder* kvRowBuilder, char* errMsg, in
       retCode =  tscSQLSyntaxErrMsg(errMsg, "json inner error", NULL);
       goto end;
     }
+    if(strlen(item->string) >= TSDB_COL_NAME_LEN){
+      tscError("json key too long error");
+      retCode =  tscSQLSyntaxErrMsg(errMsg, "json key too long, exceed 64", NULL);
+      goto end;
+    }
+
     char tagVal[TSDB_MAX_TAGS_LEN] = {0};
     int32_t outLen = 0;
     if (JSON_TYPE_BINARY){
diff --git a/src/common/src/texpr.c b/src/common/src/texpr.c
index cc2bb8803badc2aae2e80200691be0439bac3afe..29fa194b24ea1ce419b7e464bfa16975ea2f9443 100644
--- a/src/common/src/texpr.c
+++ b/src/common/src/texpr.c
@@ -117,6 +117,7 @@ void tExprTreeDestroy(tExprNode *pNode, void (*fp)(void *)) {
     doExprTreeDestroy(&pNode, fp);
   } else if (pNode->nodeType == TSQL_NODE_VALUE) {
     tVariantDestroy(pNode->pVal);
+    tfree(pNode->pVal);
   } else if (pNode->nodeType == TSQL_NODE_COL) {
     tfree(pNode->pSchema);
   }
diff --git a/src/query/inc/qFilter.h b/src/query/inc/qFilter.h
index c34a56cc1cd6e135947eee897f87d060880f15c7..2ad4b43c349a6428aed88a77a11a2dcab1033ec0 100644
--- a/src/query/inc/qFilter.h
+++ b/src/query/inc/qFilter.h
@@ -250,7 +250,7 @@ typedef struct SFilterInfo {
 
 #define COL_FIELD_SIZE (sizeof(SFilterField) + 2 * sizeof(int64_t))
 
-#define FILTER_NO_MERGE_DATA_TYPE(t) ((t) == TSDB_DATA_TYPE_BINARY || (t) == TSDB_DATA_TYPE_NCHAR)
+#define FILTER_NO_MERGE_DATA_TYPE(t) ((t) == TSDB_DATA_TYPE_BINARY || (t) == TSDB_DATA_TYPE_NCHAR || (t) == TSDB_DATA_TYPE_JSON)
 #define FILTER_NO_MERGE_OPTR(o) ((o) == TSDB_RELATION_ISNULL || (o) == TSDB_RELATION_NOTNULL || (o) == FILTER_DUMMY_EMPTY_OPTR)
 
 #define MR_EMPTY_RES(ctx) (ctx->rs == NULL)
diff --git a/src/query/src/qFilter.c b/src/query/src/qFilter.c
index 4b43288d8e16d0fcec7d49ae54abbcee7c262f61..231e7b18873b45ff2ca3d61e82f4cffe6dea6585 100644
--- a/src/query/src/qFilter.c
+++ b/src/query/src/qFilter.c
@@ -42,7 +42,12 @@ static FORCE_INLINE int32_t filterFieldColDescCompare(const void *desc1, const v
   const SSchema *sch1 = desc1;
   const SSchema *sch2 = desc2;
 
-  return sch1->colId != sch2->colId;
+  if(sch1->type == TSDB_DATA_TYPE_JSON && sch2->type == TSDB_DATA_TYPE_JSON){
+    return strcmp(sch1->name, sch2->name);
+  }
+  else{
+    return sch1->colId != sch2->colId;
+  }
 }
 
 static FORCE_INLINE int32_t filterFieldValDescCompare(const void *desc1, const void *desc2) {
@@ -849,21 +854,27 @@ static FORCE_INLINE int32_t filterAddColFieldFromField(SFilterInfo *info, SFilte
 
 int32_t filterAddFieldFromNode(SFilterInfo *info, tExprNode *node, SFilterFieldId *fid) {
   CHK_LRET(node == NULL, TSDB_CODE_QRY_APP_ERROR, "empty node");
-  CHK_RET(node->nodeType != TSQL_NODE_COL && node->nodeType != TSQL_NODE_VALUE, TSDB_CODE_QRY_APP_ERROR);
-  
+
   int32_t type;
   void *v;
-
-  if (node->nodeType == TSQL_NODE_COL) {
+  if(node->nodeType == TSQL_NODE_EXPR && node->_node.optr == TSDB_RELATION_ARROW){    // json tag -> operation
     type = FLD_TYPE_COLUMN;
+    assert(node->_node.pRight->pVal->nLen < TSDB_COL_NAME_LEN);
+    strncpy(node->_node.pLeft->pSchema->name, node->_node.pRight->pVal->pz, node->_node.pRight->pVal->nLen);
     v = node->pSchema;
     node->pSchema = NULL;
-  } else {
-    type = FLD_TYPE_VALUE;
-    v = node->pVal;
-    node->pVal = NULL;
+  }else{
+    CHK_RET(node->nodeType != TSQL_NODE_COL && node->nodeType != TSQL_NODE_VALUE, TSDB_CODE_QRY_APP_ERROR);
+    if (node->nodeType == TSQL_NODE_COL) {
+      type = FLD_TYPE_COLUMN;
+      v = node->pSchema;
+      node->pSchema = NULL;
+    } else {
+      type = FLD_TYPE_VALUE;
+      v = node->pVal;
+      node->pVal = NULL;
+    }
   }
-
   filterAddField(info, v, NULL, type, fid, 0, true);
   
   return TSDB_CODE_SUCCESS;
@@ -1531,7 +1542,7 @@ void filterDumpInfoToString(SFilterInfo *info, const char *msg, int32_t options)
         if (unit->right.type == FLD_TYPE_VALUE && FILTER_UNIT_OPTR(unit) != TSDB_RELATION_IN) {
           SFilterField *right = FILTER_UNIT_RIGHT_FIELD(info, unit);
           char *data = right->data;
-          if (IS_VAR_DATA_TYPE(type) || type == TSDB_DATA_TYPE_JSON) {
+          if (IS_VAR_DATA_TYPE(type) {
             tlen = varDataLen(data);
             data += VARSTR_HEADER_SIZE;
           }
@@ -1548,7 +1559,7 @@ void filterDumpInfoToString(SFilterInfo *info, const char *msg, int32_t options)
           if (unit->right2.type == FLD_TYPE_VALUE && FILTER_UNIT_OPTR(unit) != TSDB_RELATION_IN) {
             SFilterField *right = FILTER_UNIT_RIGHT2_FIELD(info, unit);
             char *data = right->data;
-            if (IS_VAR_DATA_TYPE(type) || type == TSDB_DATA_TYPE_JSON) {
+            if (IS_VAR_DATA_TYPE(type)) {
               tlen = varDataLen(data);
               data += VARSTR_HEADER_SIZE;
             }
diff --git a/src/query/src/qSqlParser.c b/src/query/src/qSqlParser.c
index b8b714a5a807ddf4a6dc9878d329f599bcf3ad0d..2bc4495ca01b22d230eb08b02140b45c8466d1aa 100644
--- a/src/query/src/qSqlParser.c
+++ b/src/query/src/qSqlParser.c
@@ -473,7 +473,9 @@ bool tSqlExprIsLeaf(tSqlExpr* pExpr) {
          (pExpr->tokenId == TK_ID) ||
          (pExpr->tokenId >= TK_BOOL && pExpr->tokenId <= TK_NCHAR) ||
          (pExpr->tokenId == TK_NULL) ||
-         (pExpr->tokenId == TK_SET));
+         (pExpr->tokenId == TK_SET) ||
+         (pExpr->tokenId == TK_ARROW)||
+         (pExpr->tokenId == TK_QUESTION));
 }
 
 bool tSqlExprIsParentOfLeaf(tSqlExpr* pExpr) {
diff --git a/src/tsdb/src/tsdbRead.c b/src/tsdb/src/tsdbRead.c
index 11a8048864bc3e04acb3283b7ac6a3f0dc3fe21e..2da457bd3489a1f7b17305a524d81c91107eecfe 100644
--- a/src/tsdb/src/tsdbRead.c
+++ b/src/tsdb/src/tsdbRead.c
@@ -3648,6 +3648,70 @@ SArray* createTableGroup(SArray* pTableList, STSchema* pTagSchema, SColIndex* pC
   return pTableGroup;
 }
 
+//bool checkJsonKey(STable* pTable, tVariant* key){
+//  void* data = taosHashGet(pTable->jsonKeyMap, key->pz, key->nLen);
+//  if(data == NULL) return false;
+//  else return true;
+//}
+//
+//int32_t dealWithTree(STable* pTable, tExprNode* expr){
+//  STSchema* pTagSchema = tsdbGetTableTagSchema(pTable);
+//  if(pTagSchema->columns->type != TSDB_DATA_TYPE_JSON){
+//    return TSDB_CODE_SUCCESS;
+//  }
+//
+//  if (expr->nodeType != TSQL_NODE_EXPR) {
+//    tsdbError("invalid nodeType:%d", expr->nodeType);
+//    return TSDB_CODE_QRY_APP_ERROR;
+//  }
+//
+//  if (tree->_node.optr == TSDB_RELATION_AND) {
+//    leftGroup = taosArrayInit(4, sizeof(SFilterGroup));
+//    rightGroup = taosArrayInit(4, sizeof(SFilterGroup));
+//    ERR_JRET(filterTreeToGroup(tree->_node.pLeft, info, leftGroup));
+//    ERR_JRET(filterTreeToGroup(tree->_node.pRight, info, rightGroup));
+//
+//    ERR_JRET(filterDetachCnfGroups(group, leftGroup, rightGroup));
+//
+//    taosArrayDestroyEx(leftGroup, filterFreeGroup);
+//    taosArrayDestroyEx(rightGroup, filterFreeGroup);
+//
+//    return TSDB_CODE_SUCCESS;
+//  }
+//
+//  if (tree->_node.optr == TSDB_RELATION_OR) {
+//    ERR_RET(filterTreeToGroup(tree->_node.pLeft, info, group));
+//    ERR_RET(filterTreeToGroup(tree->_node.pRight, info, group));
+//
+//    return TSDB_CODE_SUCCESS;
+//  }
+//
+//  tExprNode* tLeft = expr->_node.pLeft;
+//
+//  tVariant* var = tree->_node.pRight->pVal;
+//  int32_t type = FILTER_GET_COL_FIELD_TYPE(FILTER_GET_FIELD(info, left));
+//  int32_t len = 0;
+//  uint16_t uidx = 0;
+//
+//
+//  assert(tLeft->nodeType == TSQL_NODE_EXPR);
+//
+//  if (tLeft->_node.optr == TSDB_RELATION_ARROW) {
+//    if(!checkJsonKey(pTable, tLeft->_node.pRight->pVal)){
+//      tsdbError("no key in json:%d", expr->nodeType);
+//      return TSDB_CODE_QRY_APP_ERROR;
+//    }
+//
+//    tExprTreeDestroy(tLeft, NULL);
+//
+//    expr->_node.pLeft = calloc(1, sizeof(tExprNode));
+//
+//    expr->_node.pLeft->nodeType = TSQL_NODE_COL;
+//    expr->_node.pLeft->pSchema = calloc(1, sizeof(SSchema));
+//  }
+//  return 0;
+//}
+
 int32_t tsdbQuerySTableByTagCond(STsdbRepo* tsdb, uint64_t uid, TSKEY skey, const char* pTagCond, size_t len, 
                                  STableGroupInfo* pGroupInfo, SColIndex* pColIndex, int32_t numOfCols) {
   SArray* res = NULL;
@@ -3711,7 +3775,6 @@ int32_t tsdbQuerySTableByTagCond(STsdbRepo* tsdb, uint64_t uid, TSKEY skey, cons
   } END_TRY
 
   void *filterInfo = NULL;
-  
   ret = filterInitFromTree(expr, &filterInfo, 0);
   if (ret != TSDB_CODE_SUCCESS) {
     terrno = ret;
@@ -4001,18 +4064,51 @@ static void queryIndexlessColumn(SSkipList* pSkipList, void* filterInfo, SArray*
   tSkipListDestroyIter(iter);
 }
 
+static FORCE_INLINE int32_t tsdbGetJsonTagDataFromId(void *param, int32_t id, void **data) {
+  JsonMapValue* jsonMapV = (JsonMapValue*)(param);
+  STable* pTable = (STable*)(jsonMapV->table);
+
+  if (id == TSDB_TBNAME_COLUMN_INDEX) {
+    *data = TABLE_NAME(pTable);
+  } else {
+    *data = tdGetKVRowValOfCol(pTable->tagVal, jsonMapV->colId + 1);
+  }
+
+  return TSDB_CODE_SUCCESS;
+}
+
+static void queryByJsonTag(SArray* pTableList, void* filterInfo, SArray* res){
+  int32_t size = taosArrayGetSize(pTableList);
+  int8_t *addToResult = NULL;
+  for(int i = 0; i < size; i++){
+    JsonMapValue* data = taosArrayGet(pTableList, i);
+    filterSetColFieldData(filterInfo, data, tsdbGetJsonTagDataFromId);
+    bool all = filterExecute(filterInfo, 1, &addToResult, NULL, 0);
+
+    if (all || (addToResult && *addToResult)) {
+      STableKeyInfo info = {.pTable = (void*)(data->table), .lastKey = TSKEY_INITIAL_VAL};
+      taosArrayPush(res, &info);
+    }
+  }
+  tfree(addToResult);
+}
 
 static int32_t tsdbQueryTableList(STable* pTable, SArray* pRes, void* filterInfo) {
   STSchema*   pTSSchema = pTable->tagSchema;
-  bool indexQuery = false;
-  SSkipList *pSkipList = pTable->pIndex;
-  
-  filterIsIndexedColumnQuery(filterInfo, pTSSchema->columns->colId, &indexQuery);
-  
-  if (indexQuery) {
-    queryIndexedColumn(pSkipList, filterInfo, pRes);
-  } else {
-    queryIndexlessColumn(pSkipList, filterInfo, pRes);
+
+  if(pTSSchema->columns->type == TSDB_DATA_TYPE_JSON){
+    queryByJsonTag(pTable, filterInfo, pRes);
+  }else{
+    bool indexQuery = false;
+    SSkipList *pSkipList = pTable->pIndex;
+
+    filterIsIndexedColumnQuery(filterInfo, pTSSchema->columns->colId, &indexQuery);
+
+    if (indexQuery) {
+      queryIndexedColumn(pSkipList, filterInfo, pRes);
+    } else {
+      queryIndexlessColumn(pSkipList, filterInfo, pRes);
+    }
   }
 
   return TSDB_CODE_SUCCESS;