无法通过libpqxx将数据插入PostgreSQL

时间:2014-10-28 15:28:58

标签: c++ database postgresql libpqxx

我有一个名为mydb的数据库,其中包含一个表People(id, name)

我想使用pqxx C ++接口向该表插入一行。

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;
}

但我得到以下例外:

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)

有什么问题?

1 个答案:

答案 0 :(得分:3)

我使用c ++已经有几年了!看看doc似乎需要声明参数类型?也许这会奏效:

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

此外,还有一个尾随;在查询中。我不认为它会受到伤害,但不需要它。

-g