pub trait SingleColumn { }Expand description
What a single un-tupled selection decodes to: a bare native value, or
its Option. Sealed by construction — the impls come from the same
sql_leaf_type! that declares the types — and used to give a
one-column set operation an ORDER BY with no position to state.
Dyn Compatibility§
This trait is dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety".