107 return {tx, path, columns};
122 std::initializer_list<std::string_view> columns = {})
124 auto const &conn{tx.
conn()};
125 return raw_table(tx, conn.quote_table(path), conn.quote_columns(columns));
128#if defined(PQXX_HAVE_CONCEPTS)
137 template<PQXX_CHAR_STRINGS_ARG COLUMNS>
139 table(transaction_base &tx,
table_path path, COLUMNS
const &columns)
141 auto const &conn{tx.conn()};
143 tx, conn.quote_table(path), tx.conn().quote_columns(columns));
154 template<PQXX_CHAR_STRINGS_ARG COLUMNS>
156 table(transaction_base &tx, std::string_view path, COLUMNS
const &columns)
172 [[deprecated(
"Use table() or raw_table() factory.")]]
stream_to(
180 template<
typename Columns>
181 [[deprecated(
"Use table() or raw_table() factory.")]]
stream_to(
187 template<
typename Iter>
188 [[deprecated(
"Use table() or raw_table() factory.")]]
stream_to(
196 m_finished{other.m_finished},
197 m_buffer{std::move(other.m_buffer)},
198 m_field_buf{std::move(other.m_field_buf)},
199 m_finder{other.m_finder}
201 other.m_finished =
true;
206 [[nodiscard]] constexpr operator
bool() const noexcept
208 return not m_finished;
267 fill_buffer(fields...);
276 bool m_finished =
false;
279 std::string m_buffer;
282 std::string m_field_buf;
285 internal::char_finder_func *m_finder;
288 void write_raw_line(std::string_view);
296 static constexpr std::string_view null_field{
"\\N\t"};
300 static std::enable_if_t<nullness<T>::always_null, std::size_t>
301 estimate_buffer(T
const &)
303 return std::size(null_field);
311 static std::enable_if_t<not nullness<T>::always_null, std::size_t>
312 estimate_buffer(T
const &field)
314 return is_null(field) ? std::size(null_field) : size_buffer(field);
318 void escape_field_to_buffer(std::string_view data);
327 template<
typename Field>
328 std::enable_if_t<not nullness<Field>::always_null>
329 append_to_buffer(Field
const &f)
337 m_buffer.append(null_field);
343 using traits = string_traits<Field>;
344 auto const budget{estimate_buffer(f)};
345 auto const offset{std::size(m_buffer)};
347 if constexpr (std::is_arithmetic_v<Field>)
355 auto const total{offset + budget};
356 m_buffer.resize(total);
357 auto const data{m_buffer.data()};
358 char *
const end{traits::into_buf(data + offset, data + total, f)};
361 m_buffer.resize(
static_cast<std::size_t
>(end - data));
364 std::is_same_v<Field, std::string> or
365 std::is_same_v<Field, std::string_view> or
366 std::is_same_v<Field, zview>)
369 m_field_buf.resize(budget);
370 escape_field_to_buffer(f);
373 std::is_same_v<Field, std::optional<std::string>> or
374 std::is_same_v<Field, std::optional<std::string_view>> or
375 std::is_same_v<Field, std::optional<zview>>)
379 m_field_buf.resize(budget);
380 escape_field_to_buffer(f.value());
384 std::is_same_v<Field, std::unique_ptr<std::string>> or
385 std::is_same_v<Field, std::unique_ptr<std::string_view>> or
386 std::is_same_v<Field, std::unique_ptr<zview>> or
387 std::is_same_v<Field, std::shared_ptr<std::string>> or
388 std::is_same_v<Field, std::shared_ptr<std::string_view>> or
389 std::is_same_v<Field, std::shared_ptr<zview>>)
394 m_field_buf.resize(budget);
395 escape_field_to_buffer(*f);
401 m_field_buf.resize(budget);
402 auto const data{m_field_buf.data()};
403 escape_field_to_buffer(
404 traits::to_buf(data, data + std::size(m_field_buf), f));
416 template<
typename Field>
417 std::enable_if_t<nullness<Field>::always_null>
418 append_to_buffer(Field
const &)
420 m_buffer.append(null_field);
424 template<
typename Container>
425 std::enable_if_t<not std::is_same_v<typename Container::value_type, char>>
426 fill_buffer(Container
const &c)
431 std::size_t budget{0};
432 for (
auto const &f : c) budget += estimate_buffer(f);
433 m_buffer.reserve(budget);
434 for (
auto const &f : c) append_to_buffer(f);
438 template<
typename Tuple, std::size_t... indexes>
440 budget_tuple(Tuple
const &t, std::index_sequence<indexes...>)
442 return (estimate_buffer(std::get<indexes>(t)) + ...);
446 template<
typename Tuple, std::size_t... indexes>
447 void append_tuple(Tuple
const &t, std::index_sequence<indexes...>)
449 (append_to_buffer(std::get<indexes>(t)), ...);
453 template<
typename... Elts>
void fill_buffer(std::tuple<Elts...>
const &t)
455 using indexes = std::make_index_sequence<
sizeof...(Elts)>;
457 m_buffer.reserve(budget_tuple(t, indexes{}));
458 append_tuple(t, indexes{});
462 template<
typename... Ts>
void fill_buffer(
const Ts &...fields)
464 (..., append_to_buffer(fields));
467 constexpr static std::string_view s_classname{
"stream_to"};