英文原文是: call PQsetSingleRowMode immediately after a successful call of PQsendQuery (or a sibling function);
代码测试下也是 PQsetSingleRowMode(conn) 应该在 PQsendQuery(conn, cmd) 后调用;
PQsetSingleRowMode(conn) 设置成功返回1, 失败返回0, 测试代码如下:
// 成功: ok 得 1;
int ok = PQsendQuery(conn, cmd.data());
ok = PQsetSingleRowMode(conn);
std::cout << std::format("设单行结果: {}\n", ok);
// 反过来后再运行: 失败: ok 得 0:
int ok = PQsetSingleRowMode(conn);
std::cout << std::format("设单行结果: {}\n", ok);
ok = PQsendQuery(conn, cmd.data());
ChenHuajun
commented
1 year ago
英文原文是: call PQsetSingleRowMode immediately after a successful call of PQsendQuery (or a sibling function); 代码测试下也是 PQsetSingleRowMode(conn) 应该在 PQsendQuery(conn, cmd) 后调用;
PQsetSingleRowMode(conn) 设置成功返回1, 失败返回0, 测试代码如下:
// 成功: ok 得 1; int ok = PQsendQuery(conn, cmd.data()); ok = PQsetSingleRowMode(conn); std::cout << std::format("设单行结果: {}\n", ok);
// 反过来后再运行: 失败: ok 得 0: int ok = PQsetSingleRowMode(conn); std::cout << std::format("设单行结果: {}\n", ok); ok = PQsendQuery(conn, cmd.data());