DDL to Internal TableManager API reveal

@Override public void alterTable(String name, Consumer<TableChange> tableChange)

@Override public void alterTable(String name, @NotNull Predicate<TableChange> tableChange)

        CompletableFuture<Void> fut = tableManager.alterTableAsync(canonicalName, tblCh -> {
            tblCh.changeColumns(
                columns -> {
                    Set<String> existCols = columns.namedListKeys().stream().map(k -> columns.get(k).name())
                        .collect(Collectors.toUnmodifiableSet());

                    cmd.columns().stream().map(Column::name).filter(existCols::contains)
                        .collect(Collectors.toCollection(() -> issues));

                    if (issues.isEmpty()) {
                        for (Column col0 : cmd.columns())
                            columns.create(col0.name(), colChg -> convert(col0, colChg));
                    }
                }
            );

            return issues.isEmpty();
        });