sql_cursor.hxx

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#ifndef PQXX_H_SQL_CURSOR
#define PQXX_H_SQL_CURSOR
 
namespace pqxx::internal
{

class PQXX_LIBEXPORT sql_cursor : public cursor_base
{
public:
  sql_cursor(
    transaction_base &t, std::string_view query, std::string_view cname,
    cursor_base::access_policy ap, cursor_base::update_policy up,
    cursor_base::ownership_policy op, bool hold);
 
  sql_cursor(
    transaction_base &t, std::string_view cname,
    cursor_base::ownership_policy op);
 
  ~sql_cursor() noexcept { close(); }
 
  result fetch(difference_type rows, difference_type &displacement);
  result fetch(difference_type rows)
  {
    difference_type d = 0;
    return fetch(rows, d);
  }
  difference_type move(difference_type rows, difference_type &displacement);
  difference_type move(difference_type rows)
  {
    difference_type d = 0;
    return move(rows, d);
  }


  difference_type pos() const noexcept { return m_pos; }


  difference_type endpos() const noexcept { return m_endpos; }

  result const &empty_result() const noexcept { return m_empty_result; }
 
  void close() noexcept;
 
private:
  difference_type adjust(difference_type hoped, difference_type actual);
  static std::string stridestring(difference_type);
  void init_empty_result(transaction_base &);

  connection &m_home;

  result m_empty_result;
 
  result m_cached_current_row;

  cursor_base::ownership_policy m_ownership;

  int m_at_end;

  difference_type m_pos;

  difference_type m_endpos = -1;
};
 
 
PQXX_LIBEXPORT result_size_type obtain_stateless_cursor_size(sql_cursor &);
PQXX_LIBEXPORT result stateless_cursor_retrieve(
  sql_cursor &, result::difference_type size,
  result::difference_type begin_pos, result::difference_type end_pos);
} // namespace pqxx::internal
#endif