added postgres backend

2023-11-25 12:33:51 +01:00
parent c2a96f4cbd
commit 825e530a8d
20 changed files with 547 additions and 65 deletions
@@ -0,0 +1,47 @@
+#ifndef QUERY_POSTGRES_RESULT_READER_HPP
+#define QUERY_POSTGRES_RESULT_READER_HPP
+
+#include <libpq-fe.h>
+#include "matador/sql/query_result_reader.hpp"
+
+namespace matador::backends::postgres {
+
+class postgres_result_reader : public sql::query_result_reader
+{
+public:
+  explicit postgres_result_reader(PGresult *result);
+  ~postgres_result_reader() override;
+
+  [[nodiscard]] size_t column_count() const override;
+  [[nodiscard]] const char *column(size_t index) const override;
+  bool fetch() override;
+
+  void read_value(const char *id, size_t index, char &value) override;
+  void read_value(const char *id, size_t index, short &value) override;
+  void read_value(const char *id, size_t index, int &value) override;
+  void read_value(const char *id, size_t index, long &value) override;
+  void read_value(const char *id, size_t index, long long int &value) override;
+  void read_value(const char *id, size_t index, unsigned char &value) override;
+  void read_value(const char *id, size_t index, unsigned short &value) override;
+  void read_value(const char *id, size_t index, unsigned int &value) override;
+  void read_value(const char *id, size_t index, unsigned long &value) override;
+  void read_value(const char *id, size_t index, unsigned long long int &value) override;
+  void read_value(const char *id, size_t index, bool &value) override;
+  void read_value(const char *id, size_t index, float &value) override;
+  void read_value(const char *id, size_t index, double &value) override;
+  void read_value(const char *id, size_t index, char *value, size_t s) override;
+  void read_value(const char *id, size_t index, std::string &value) override;
+  void read_value(const char *id, size_t index, std::string &value, size_t s) override;
+  void read_value(const char *id, size_t index, sql::any_type &value, sql::data_type_t type, size_t size) override;
+
+private:
+  PGresult *result_{};
+
+  size_t row_count_{};
+  size_t column_count_{};
+  size_t row_index_{0};
+};
+
+}
+
+#endif //QUERY_POSTGRES_RESULT_READER_HPP