Add parameters to pg_conn_t::exec_prepared_internal() function

These parameters will allow us to read/write data in binary format
later.

Author: joto

src/pgsql.cpp

@@ -132,18 +132,23 @@ static std::string concat_params(int num_params,
     return joiner();
 }
 
-pg_result_t
-pg_conn_t::exec_prepared_internal(char const *stmt, int num_params,
-                                  char const *const *param_values) const
+pg_result_t pg_conn_t::exec_prepared_internal(char const *stmt, int num_params,
+                                              char const *const *param_values,
+                                              int *param_lengths,
+                                              int *param_formats,
+                                              int result_format) const
 {
     assert(m_conn);
 
     if (get_logger().log_sql()) {
         log_sql("EXECUTE {}({})", stmt,
                 concat_params(num_params, param_values));
     }
+
     pg_result_t res{PQexecPrepared(m_conn.get(), stmt, num_params, param_values,
-                                   nullptr, nullptr, 0)};
+                                   param_lengths, param_formats,
+                                   result_format)};
+
     auto const status = res.status();
     if (status != PGRES_COMMAND_OK && status != PGRES_TUPLES_OK) {
         log_error("SQL command failed: EXECUTE {}({})", stmt,

src/pgsql.hpp

@@ -233,7 +233,7 @@ class pg_conn_t
                                             std::forward<TArgs>(params))...};
 
         return exec_prepared_internal(stmt, sizeof...(params),
-                                      param_ptrs.data());
+                                      param_ptrs.data(), nullptr, nullptr, 0);
     }
 
     /**
@@ -254,7 +254,9 @@ class pg_conn_t
 
 private:
     pg_result_t exec_prepared_internal(char const *stmt, int num_params,
-                                       char const *const *param_values) const;
+                                       char const *const *param_values,
+                                       int *param_lengths, int *param_formats,
+                                       int result_format) const;
 
     struct pg_conn_deleter_t
     {