message: Set selection vector of mock chunk
diff: @@ -289,6 +289,7 @@ static void CreateMockChunk(TableCatalogEntry &table, vector<column_t> &column_i
  mock_chunk.InitializeEmpty(types);
  for(column_t i = 0; i < column_ids.size(); i++) {
  mock_chunk.data[column_ids[i]].Reference(chunk.data[i]);
  + mock_chunk.sel_vector = mock_chunk.data[column_ids[i]].sel_vector;
  }
  mock_chunk.data[0].count = chunk.size();
  }
  