Constant GENERATED 

pub const GENERATED: ColumnMarker;

Makes the column a generated column: stored (computed on write) or virtual (computed on read), from a raw SQL expression.

Examples

#[column(generated(stored, "length(name)"))]
stored_name_len: i32,

#[column(generated(virtual, "length(name)"))]
virtual_name_len: i32,

See: https://sqlite.org/gencol.html