c++ - 无法通过libpqxx将数据插入PostgreSQL

我有一个名为mydb和表People(id, name)的数据库。

我想使用pqxx C++接口(interface)在该表中插入一行。

SQL查询非常简单INSERT INTO people (id, name) VALUES (1, "Bob");
C++代码在这里:

#include <pqxx/pqxx>

using namespace std;

int main(int, char *argv[])
{
  pqxx::connection conn( /* some stuff here */ );

  conn.prepare("insert_to_people", "insert into people (id, name) values ($1, $2);");
  pqxx::work pq(conn);

  pq.prepared("insert_to_people")(1)("Bob").exec();
  pq.commit();

  return 0;
}

但是我得到以下异常:

terminate called after throwing an instance of 'pqxx::usage_error'
  what():  Too many arguments for prepared statement insert_to_people: expected 0, received 2
Aborted (core dumped)

怎么了？

最佳答案

自从我使用c++已经好几年了!查看文档，似乎需要声明参数类型？也许这可以工作:

conn.prepare("insert_to_people", "insert into people (id, name) values ($1, $2)")("integer")("varchar", pqxx::prepare::treat_string);

另外，还有一条尾随；在查询中。我不认为这会造成伤害，但这不是必需的。

-G