MS-620 Get table row counts display wrong error code

Former-commit-id: efac2241b903fbb45eb26adf2d9dfd79fa8f1353

cpp/CHANGELOG.md

@@ -12,6 +12,7 @@ Please mark all change in change log and use the ticket from JIRA.
 - MS-599 - search wrong result when table created with metric_type: IP
 - MS-601 - Docker logs error caused by get CPUTemperature error
 - MS-622 - Delete vectors should be failed if date range is invalid
+- MS-620 - Get table row counts display wrong error code
 
 ## Improvement
 - MS-552 - Add and change the easylogging library

cpp/src/server/grpc_impl/GrpcRequestTask.cpp

@@ -706,7 +706,11 @@ CountTableTask::OnExecute() {
         uint64_t row_count = 0;
         status = DBWrapper::DB()->GetTableRowCount(table_name_, row_count);
         if (!status.ok()) {
-            return status;
+            if (status.code(), DB_NOT_FOUND) {
+                return Status(SERVER_TABLE_NOT_EXIST, "Table " + table_name_ + " not exists");
+            } else {
+                return status;
+            }
         }
 
         row_count_ = static_cast<int64_t>(row_count);