enable different value type of the same key in json

src/client/src/tscSQLParser.c

@@ -4737,6 +4737,18 @@ static int32_t validateJsonTagExpr(tSqlExpr* pExpr, char* msgBuf) {
       if (pLeft->pRight && (pLeft->pRight->value.nLen > TSDB_MAX_JSON_KEY_LEN || pLeft->pRight->value.nLen <= 0))
         return invalidOperationMsg(msgBuf, msg2);
     }
+
+    if (pRight->value.nType == TSDB_DATA_TYPE_BINARY){    // json value store by nchar, so need to convert to nchar
+      char newData[TSDB_MAX_JSON_TAGS_LEN] = {0};
+      int len = 0;
+      if(!taosMbsToUcs4(pRight->value.pz, pRight->value.nLen, newData, TSDB_MAX_JSON_TAGS_LEN, &len)){
+        tscError("json where condition mbsToUcs4 error");
+      }
+      char* p = realloc(pRight->value.pz, len);
+      pRight->value.nLen = len;
+      pRight->value.nType = TSDB_DATA_TYPE_NCHAR;
+      memcpy(pRight->value.pz, newData, len);
+    }
   }
 
   return TSDB_CODE_SUCCESS;

src/query/src/qFilter.c

@@ -1854,7 +1854,7 @@ int32_t filterInitValFieldData(SFilterInfo *info) {
     } else if (type == TSDB_DATA_TYPE_NCHAR) {
       size_t len = (var->nType == TSDB_DATA_TYPE_BINARY || var->nType == TSDB_DATA_TYPE_NCHAR) ? var->nLen : MAX_NUM_STR_SIZE;    
       fi->data = calloc(1, (len + 1) * TSDB_NCHAR_SIZE + VARSTR_HEADER_SIZE);
-    } else {
+    } else if (type != TSDB_DATA_TYPE_JSON){
       if (var->nType == TSDB_DATA_TYPE_VALUE_ARRAY) {  //TIME RANGE
         fi->data = calloc(var->nLen, tDataTypes[type].bytes);
         for (int32_t a = 0; a < var->nLen; ++a) {