13 #ifndef PQXX_H_PIPELINE 14 #define PQXX_H_PIPELINE 16 #include "pqxx/compiler-public.hxx" 17 #include "pqxx/internal/compiler-internal-pre.hxx" 23 #include "pqxx/transaction_base.hxx" 51 namedclass{
"pipeline"},
57 namedclass{
"pipeline", name},
63 namedclass{
"pipeline", std::move(name)},
69 namedclass{
"pipeline", name},
119 [[nodiscard]]
bool is_finished(
query_id)
const;
130 return retrieve(m_queries.find(qid)).second;
135 std::pair<query_id, result> retrieve();
137 [[nodiscard]]
bool empty() const noexcept {
return m_queries.empty(); }
152 int retain(
int retain_max = 2);
159 class PQXX_PRIVATE Query
162 explicit Query(std::string_view q) :
163 m_query{std::make_shared<std::string>(q)},
167 result const &get_result()
const noexcept {
return m_res; }
168 void set_result(
result const &r) noexcept { m_res = r; }
169 std::shared_ptr<std::string> get_query()
const noexcept {
return m_query; }
172 std::shared_ptr<std::string> m_query;
176 using QueryMap = std::map<query_id, Query>;
183 static constexpr
query_id qid_limit() noexcept
189 return (std::numeric_limits<query_id>::max)();
193 PQXX_PRIVATE
query_id generate_id();
195 bool have_pending()
const noexcept
197 return m_issuedrange.second != m_issuedrange.first;
200 PQXX_PRIVATE
void issue();
203 void set_error_at(
query_id qid) noexcept
210 [[noreturn]] PQXX_PRIVATE
void internal_error(std::string
const &err);
212 PQXX_PRIVATE
bool obtain_result(
bool expect_none =
false);
214 PQXX_PRIVATE
void obtain_dummy();
215 PQXX_PRIVATE
void get_further_available_results();
216 PQXX_PRIVATE
void check_end_results();
219 PQXX_PRIVATE
void receive_if_available();
222 PQXX_PRIVATE
void receive(pipeline::QueryMap::const_iterator stop);
223 std::pair<pipeline::query_id, result> retrieve(pipeline::QueryMap::iterator);
226 std::pair<QueryMap::iterator, QueryMap::iterator> m_issuedrange;
228 int m_num_waiting = 0;
232 bool m_dummy_pending =
false;
239 #include "pqxx/internal/compiler-internal-post.hxx" result retrieve(query_id qid)
Retrieve result for given query.
Definition: pipeline.hxx:128
pipeline(transaction_base &t, std::string_view name)
Definition: pipeline.hxx:68
The home of all libpqxx classes, functions, templates, etc.
Definition: array.hxx:25
bool empty() const noexcept
Definition: pipeline.hxx:137
Processes several queries in FIFO manner, optimized for high throughput.
Definition: pipeline.hxx:42
pipeline(transaction_base &t, char const name[])
Definition: pipeline.hxx:56
long query_id
Definition: pipeline.hxx:45
pipeline(transaction_base &t, std::string &&name)
Definition: pipeline.hxx:62
Interface definition (and common code) for "transaction" classes.
Definition: transaction_base.hxx:97
Result set containing data returned by a query or command.
Definition: result.hxx:70
pipeline(transaction_base &t)
Definition: pipeline.hxx:50
Definition: transaction_base.hxx:42
Internal error in libpqxx library.
Definition: except.hxx:157