从MySql移植到T

滥用parsname函数：

create function INET_ATON (@addr varchar(15))returns bigintwith schemabindingasbegin  return      cast(parsename(@addr, 4) as bigint) * 16777216 +    cast(parsename(@addr, 3) as bigint) * 65536 +    cast(parsename(@addr, 2) as bigint) * 256 +    cast(parsename(@addr, 1) as bigint)end

不过，此处不支持“简写地址”。