create_enum! {
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub(crate) enum Flag<u16> {
NotNull = (1),
PrimaryKey = (2),
UniqueKey = (4),
MultipleKey = (8),
Blob = (16),
Unsigned = (32),
Zerofill = (64),
Binary = (128),
Enum = (256),
AutoIncrement = (512),
Timestamp = (1024),
Set = (2048),
NoDefaultValue = (4096),
OnUpdateNow = (8192),
Num = (32768),
}
}