select ProId from products where (SoldOut = 0 or SoldOut = 2) and (Type = '' or Type is null or Type = 'B2C') SQLSTATE[HY000]: General error: 2006 MySQL server has gone away<br>错误代码：<i>#HY000</i> - Array
(
    [0] => HY000
    [1] => 2006
    [2] => MySQL server has gone away
)