Ejemplo n.º 1
0
void
table_base::rename_field_impl(const abstract_mapper_base &before, const abstract_mapper_base &after) const {
    if (_is_open)
        throw table_open_exception();

    const column_id_set my_columns = _value_mapper.column_ids();
    if (! (
            is_subset(before.column_ids(), my_columns)
         || is_subset(after.column_ids(), my_columns)
    ))
        throw outside_table_exception(_binomen);

    vector<string> names_before;
    vector<string> names_after;
    before.for_each_persistent_column([&](const persistent_column_mapper &p)    { names_before.push_back(p.name()); } );
    after.for_each_persistent_column([&](const persistent_column_mapper &p)     { names_after.push_back(p.name()); } );

    const size_t n = names_before.size();
    assert(names_after.size() == n);

    transaction txn(_database);
    unique_ptr<sql> cmd;
    for (size_t i = 0; i < n; i++) {
        cmd = _database.make_sql();
        cmd->write_rename_column(_binomen, names_before[i], names_after[i]);
        _database.get_session()->exec(*cmd);
    }
    txn.commit();
}
Ejemplo n.º 2
0
void
sql::write_update(
    const binomen &table,
    const abstract_mapper_base &dest,
    const abstract_mapper_base &src,
    optional<column_id> excluded
) {
    vector<const column_mapper *> src_columns;
    src.for_each_column([&](const column_mapper &c) {
        src_columns.push_back(&c);
    });
    auto src_column_iter = src_columns.begin();

    write("UPDATE ");
    write_quoted(table);
    write(" SET ");
    comma_separated_list_scope list_scope(*this);
    dest.for_each_persistent_column([&](const persistent_column_mapper &p) {
        if (p.id() != excluded) {
            list_scope.start_item();
            write_quoted(p.name());
            write(" = ");
            write_evaluation(**src_column_iter++);
        }
    });
}
Ejemplo n.º 3
0
void
sql::write_titles(const abstract_mapper_base &mapper, optional<column_id> generated_key) {
    comma_separated_list_scope list_scope(*this);
    mapper.for_each_persistent_column([&](const persistent_column_mapper &p) {
        list_scope.start_item();
        write_title(p, generated_key);
        if (! p.can_be_all_null())  write(" NOT NULL");
    });
}
Ejemplo n.º 4
0
void
sql::write_unconstrain_as_not_null(const binomen &table, const abstract_mapper_base &mapper) {
    write_alter_table(table);
    comma_separated_list_scope list_scope(*this);
    mapper.for_each_persistent_column([&](const persistent_column_mapper &p) {
        list_scope.start_item();
        write("ALTER COLUMN ");
        write_quoted(p.name());
        write(" DROP NOT NULL");
    });
}
Ejemplo n.º 5
0
void
sql::write_parenthesized_persistent_column_list(const abstract_mapper_base &mapper, optional<column_id> excluded) {
    write("(");
    comma_separated_list_scope list_scope(*this);
    mapper.for_each_persistent_column(
        [&](const persistent_column_mapper &p) {
            if (p.id() != excluded) {
                list_scope.start_item();
                write_quoted(p.name());
            }
        }
    );
    write(")");
}
Ejemplo n.º 6
0
void
sql::write_values(
    const abstract_mapper_base &value_mapper,
    const row &data,
    optional<column_id> excluded
) {
    write(" VALUES (");
    comma_separated_list_scope list_scope(*this);
    value_mapper.for_each_persistent_column(
        [&](const persistent_column_mapper &p) {
            if (p.id() != excluded) {
                list_scope.start_item();
                write_value(*data.find_cell(p.name()));
            }
        }
    );
    write(")");
}
Ejemplo n.º 7
0
void
sql::write_update(
    const binomen &table,
    const abstract_mapper_base &dest,
    const row &src,
    optional<column_id> excluded
) {
    // TODO: factor out the code in common with the other overload
    //
    write("UPDATE ");
    write_quoted(table);
    write(" SET ");
    comma_separated_list_scope list_scope(*this);
    dest.for_each_persistent_column([&](const persistent_column_mapper &p) {
        if (p.id() != excluded) {
            list_scope.start_item();
            write_quoted(p.name());
            write(" = ");
            write_value(*src.find_cell(p.name()));
        }
    });
}