Class pqxx::binarystring: Use std::basic_string<std::byte> and std::basic_string_view<std::byte> for binary data.
Member pqxx::connection::esc_raw (unsigned char const bin[], std::size_t len) const: Use std::basic_string_view<std::byte> instead.
Member pqxx::connection::quote (binarystring const &) const: Use basic_string or basic_string_view of std::byte.
Member pqxx::connection::quote_raw (unsigned char const bin[], std::size_t len) const: Use std::basic_string_view<std::byte> instead.
Member pqxx::connection_base: Old base class for connection. They are now the same class.
Member pqxx::encrypt_password (std::string const &user, std::string const &password): Use connection::encrypt_password instead.
Member pqxx::encrypt_password (char const user[], char const password[]): Use connection::encrypt_password instead.
Class pqxx::internal::namedclass: To be replaced with something simpler, cleaner, and faster.
Member pqxx::row::swap (row &) noexcept: Do this sort of thing on iterators instead.
Member pqxx::stream_from::stream_from (transaction_base &tx, std::string_view table, Columns const &columns): Use the from_table_t overload instead.
Member pqxx::stream_from::stream_from (transaction_base &tx, std::string_view table): Use the from_table_t overload instead.
Member pqxx::stream_from::stream_from (transaction_base &, std::string_view table, Iter columns_begin, Iter columns_end): Use the from_table_t overload instead.
Member pqxx::strip_t: In C++20 we'll replace this with std::remove_cvref.