Struct diesel::expression::expression_types::Untyped

pub struct Untyped;

Query nodes with this expression type do not have a statically at compile time known expression type.

An example for such a query node in diesel itself, is sql_query as we do not know which fields are returned from such a query at compile time.

For loading values from queries returning a type of this expression, consider using #[derive(QueryableByName)] on the corresponding result type.

Trait Implementations

impl Clone for Untyped

fn clone(&self) -> Untyped

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<U, DB> CompatibleType<U, DB> for Untyped

where U: FromSqlRow<Untyped, DB>, DB: Backend,

type SqlType = Untyped

Available on crate feature i-implement-a-third-party-backend-and-opt-into-breaking-changes only.

impl Debug for Untyped

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<DB, T> FromSqlRow<Untyped, DB> for T

where DB: Backend, T: QueryableByName<DB>,

fn build_from_row<'a>(row: &impl Row<'a, DB>) -> Result<Self>

See the trait documentation.

impl Copy for Untyped

impl TypedExpressionType for Untyped