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/*PGR-GNU*****************************************************************
File: get_data.hpp
Copyright (c) 2023-2026 pgRouting developers
Mail: project@pgrouting.org
Copyright (c) 2023 Celia Virginia Vergara Castillo
mail: vicky at erosion.dev
------
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
********************************************************************PGR-GNU*/
#ifndef INCLUDE_CPP_COMMON_GET_DATA_HPP_
#define INCLUDE_CPP_COMMON_GET_DATA_HPP_
#pragma once
#include "c_common/postgres_connection.h"
#include <vector>
#include <string>
#include <cstdint>
#include "cpp_common/info_t.hpp"
#include "cpp_common/get_check_data.hpp"
#include "cpp_common/alloc.hpp"
namespace pgrouting {
/** @brief Retrieves the tuples
* @tparam Data_type Scructure of data
* @tparam Func fetcher function
* @param[in] sql Query to be processed
* @param[out] pgtuples C array of data
* @param[out] total_pgtuples C array size
* @param[in] flag useful flag depending on data
* @param[in] info information about the data
* @param[in] func fetcher function to be used
*/
template <typename Data_type, typename Func>
void get_data(
char *sql,
Data_type **pgtuples,
size_t *total_pgtuples,
bool flag,
std::vector<Column_info_t> info,
Func func) {
const int tuple_limit = 1000000;
size_t total_tuples = 0;
size_t valid_pgtuples = 0;
auto SPIplan = pgr_SPI_prepare(sql);
auto SPIportal = pgr_SPI_cursor_open(SPIplan);
bool moredata = true;
(*total_pgtuples) = total_tuples = valid_pgtuples = 0;
int64_t default_id = 0;
while (moredata == true) {
SPI_cursor_fetch(SPIportal, true, tuple_limit);
auto tuptable = SPI_tuptable;
auto tupdesc = SPI_tuptable->tupdesc;
if (total_tuples == 0) fetch_column_info(tupdesc, info);
size_t ntuples = SPI_processed;
total_tuples += ntuples;
if (ntuples > 0) {
(*pgtuples) = pgr_alloc(total_tuples, *pgtuples);
if ((*pgtuples) == NULL) {
throw std::string("Out of memory!");
}
for (size_t t = 0; t < ntuples; t++) {
func(tuptable->vals[t], tupdesc, info,
&default_id,
&(*pgtuples)[total_tuples - ntuples + t],
&valid_pgtuples, flag);
}
SPI_freetuptable(tuptable);
} else {
moredata = false;
}
}
SPI_cursor_close(SPIportal);
(*total_pgtuples) = total_tuples;
}
namespace pgget {
/** @brief Retrieves the tuples
* @tparam Data_type Scructure of data
* @tparam Func fetcher function
* @param[in] sql Query to be processed
* @param[in] flag useful flag depending on data
* @param[in] info information about the data
* @param[in] func fetcher function to be used
*/
template <typename Data_type, typename Func>
std::vector<Data_type> get_data(
const std::string& sql,
bool flag,
std::vector<Column_info_t> info,
Func func) {
const int tuple_limit = 1000000;
size_t total_tuples = 0;
size_t valid_pgtuples = 0;
auto SPIplan = pgr_SPI_prepare(sql.c_str());
auto SPIportal = pgr_SPI_cursor_open(SPIplan);
bool moredata = true;
total_tuples = valid_pgtuples = 0;
int64_t default_id = 0;
std::vector<Data_type> tuples;
while (moredata == true) {
SPI_cursor_fetch(SPIportal, true, tuple_limit);
auto tuptable = SPI_tuptable;
auto tupdesc = SPI_tuptable->tupdesc;
if (total_tuples == 0) fetch_column_info(tupdesc, info);
size_t ntuples = SPI_processed;
total_tuples += ntuples;
if (ntuples > 0) {
tuples.reserve(total_tuples);
for (size_t t = 0; t < ntuples; t++) {
tuples.push_back(func(tuptable->vals[t], tupdesc, info,
&default_id,
&valid_pgtuples, flag));
}
SPI_freetuptable(tuptable);
} else {
moredata = false;
}
}
SPI_cursor_close(SPIportal);
return tuples;
}
} // namespace pgget
} // namespace pgrouting
#endif // INCLUDE_CPP_COMMON_GET_DATA_HPP_
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