16 #if !defined(PQXX_HEADER_PRE) 17 # error "Include libpqxx headers as <pqxx/header>, not <pqxx/header.hxx>." 23 #include "pqxx/result.hxx" 24 #include "pqxx/transaction_base.hxx" 109 [[nodiscard]]
static difference_type all() noexcept;
128 [[nodiscard]]
static difference_type backward_all() noexcept;
138 [[nodiscard]] constexpr
std::
string const &name() const noexcept
151 #include <pqxx/internal/sql_cursor.hxx> 163 template<cursor_base::update_policy up, cursor_base::ownership_policy op>
193 m_cur{tx, adopted_cursor, op}
205 void close() noexcept { m_cur.close(); }
213 return internal::obtain_stateless_cursor_size(m_cur);
230 return internal::stateless_cursor_retrieve(
235 [[nodiscard]] constexpr std::string
const &
name() const noexcept
241 internal::sql_cursor m_cur;
245 class icursor_iterator;
251 class icursor_iterator_icursorstream;
252 class icursorstream_icursor_iterator;
326 constexpr
operator bool() const &noexcept {
return not m_done; }
366 void set_stride(difference_type stride) &;
375 friend class internal::gate::icursorstream_icursor_iterator;
382 internal::sql_cursor m_cur;
454 return not operator==(rhs);
463 return not(*
this > rhs);
467 return not(*
this < rhs);
471 void refresh()
const;
473 friend class internal::gate::icursor_iterator_icursorstream;
475 void fill(
result const &);
479 difference_type m_pos;
480 icursor_iterator *m_prev{
nullptr}, *m_next{
nullptr};
Cursor can be used to read data but not to write.
Definition: cursor.hxx:66
Simple read-only cursor represented as a stream of results.
Definition: cursor.hxx:274
Destroy SQL cursor when cursor object is closed at end of transaction.
Definition: cursor.hxx:90
static constexpr difference_type prior() noexcept
Special value: read backwards, one row only.
Definition: cursor.hxx:119
result const * operator->() const
Definition: cursor.hxx:441
std::input_iterator_tag iterator_category
Definition: cursor.hxx:423
The home of all libpqxx classes, functions, templates, etc.
Definition: array.hxx:26
"Stateless cursor" class: easy API for retrieving parts of result sets
Definition: cursor.hxx:164
bool operator>=(icursor_iterator const &rhs) const
Definition: cursor.hxx:465
Connection to a database.
Definition: connection.hxx:184
result const & reference
Definition: cursor.hxx:426
update_policy
Cursor update policy.
Definition: cursor.hxx:63
icursorstream & operator>>(result &res)
Read new value into given result object; same as get(result&).
Definition: cursor.hxx:351
bool operator<=(icursor_iterator const &rhs) const
Definition: cursor.hxx:461
result_difference_type difference_type
Definition: cursor.hxx:45
istream_type::difference_type difference_type
Definition: cursor.hxx:429
Approximate istream_iterator for icursorstream.
Definition: cursor.hxx:420
Reference to a field in a result set.
Definition: field.hxx:34
cursor_base::difference_type difference_type
Definition: cursor.hxx:278
std::string const m_name
Definition: cursor.hxx:146
size_type size()
Number of rows in cursor's result set.
Definition: cursor.hxx:211
Interface definition (and common code) for "transaction" classes.
Definition: transaction_base.hxx:76
result_difference_type difference_type
Definition: cursor.hxx:168
result_difference_type difference_type
Definition: result.hxx:77
int result_size_type
Number of rows in a result set.
Definition: types.hxx:28
result_size_type size_type
Definition: cursor.hxx:44
static difference_type backward_all() noexcept
Special value: read backwards from current position back to origin.
Definition: cursor.cxx:35
cursor_base::size_type size_type
Definition: cursor.hxx:277
ownership_policy
Cursor destruction policy.
Definition: cursor.hxx:87
constexpr difference_type stride() const noexcept
Definition: cursor.hxx:367
stateless_cursor(transaction_base &tx, std::string_view adopted_cursor)
Adopt an existing scrolling SQL cursor.
Definition: cursor.hxx:192
stateless_cursor(transaction_base &tx, std::string_view query, std::string_view cname, bool hold)
Create cursor.
Definition: cursor.hxx:179
access_policy
Cursor access-pattern policy.
Definition: cursor.hxx:51
Definition: connection.hxx:98
void close() noexcept
Close this cursor.
Definition: cursor.hxx:205
result_size_type size_type
Definition: cursor.hxx:167
istream_type::size_type size_type
Definition: cursor.hxx:428
int result_difference_type
Difference between result sizes.
Definition: types.hxx:31
Common definitions for cursor types.
Definition: cursor.hxx:41
bool operator!=(icursor_iterator const &rhs) const noexcept
Definition: cursor.hxx:452
Result set containing data returned by a query or command.
Definition: result.hxx:73
result const * pointer
Definition: cursor.hxx:425
bool operator>(icursor_iterator const &rhs) const
Definition: cursor.hxx:457
Cursor can move forward only.
Definition: cursor.hxx:54
Cursor can move back and forth.
Definition: cursor.hxx:56
result retrieve(difference_type begin_pos, difference_type end_pos)
Retrieve rows from begin_pos (inclusive) to end_pos (exclusive)
Definition: cursor.hxx:228
constexpr std::string const & name() const noexcept
Return this cursor's name.
Definition: cursor.hxx:235