[英]MySql affected_rows always 0 but UPDATE works
以下代碼總是記錄affected_rows為0.我檢查我的數據庫,每次都更新行。 為什么是0?
public static function updateNextRunTime($nextRunTime)
{
$mysqli = new mysqli(GDB_HOST, GDB_USERNAME, GDB_PASSWORD, GDB_NAME);
if ($mysqli->connect_errno)
{
throw new Exception('DB Connection Failed. Error Code: ' . $mysqli->connect_errno);
}
$cmd = $mysqli->prepare("UPDATE balanceagent SET NextRunTime = ? WHERE Id = 1");
if (!$cmd)
{
throw new Exception($mysqli->error);
}
$cmd->bind_param('s', $nextRunTime);
$cmd->execute();
$rows = $mysqli->affected_rows;
$cmd->close();
$mysqli->close();
if ($rows != 1)
{
logToFile("Balance Agent Error - Failed to update the next run time! - Affected rows: " . $rows);
}
}
你應該檢查$cmd->affected_rows;
而不是$mysqli->affected_rows;
對於預准備語句,您應該使用mysqli_stmt :: affected_rows表單:
$cmd->bind_param('s', $nextRunTime);
$cmd->execute();
$rows = $cmd->affected_rows;
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