Module mem_query::col [−][src]
Expand description
Definition of fields for relational tuples.
At the very core of the memquery engine is the Col
trait,
and the col!
macro that produces new column types that
implement the trait.
Each Col
is a transparent newtype that represents a
single data cell in a relational table. It has very few
methods of its own and Deref
s to its inner type, so you
can use a column cell in most places that expect the value
stored there.
Traits
Col | A trait to represent a relation field |
ColProxy | A value that stands in for a column |