func makeColIDtoRowIndex(row planNode, desc *sqlbase.TableDescriptor) ( map[sqlbase.ColumnID]int, error, ) { columns := row.Columns() colIDtoRowIndex := make(map[sqlbase.ColumnID]int, len(columns)) for i, column := range columns { s, idx, err := desc.FindColumnByName(column.Name) if err != nil { return nil, err } switch s { case sqlbase.DescriptorActive: colIDtoRowIndex[desc.Columns[idx].ID] = i case sqlbase.DescriptorIncomplete: colIDtoRowIndex[desc.Mutations[idx].GetColumn().ID] = i default: panic("unreachable") } } return colIDtoRowIndex, nil }