Struct diesel::expression::helper_types::IsNull

pub struct IsNull<Expr> { /* fields omitted */ }

Methods

impl<Expr> IsNull<Expr>

fn new(expr: Expr) -> Self

Trait Implementations

impl<Expr: Debug> Debug for IsNull<Expr>

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl<Expr: Clone> Clone for IsNull<Expr>

fn clone(&self) -> IsNull<Expr>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<Expr: Copy> Copy for IsNull<Expr>

impl<Expr> QueryId for IsNull<Expr> where
    Expr: QueryId, 

type QueryId = IsNull<Expr::QueryId>

fn has_static_query_id() -> bool

fn query_id() -> Option<TypeId>

impl<Expr, QS> SelectableExpression<QS> for IsNull<Expr> where
    IsNull<Expr>: AppearsOnTable<QS>,
    Expr: SelectableExpression<QS>, 

impl<Expr, QS> AppearsOnTable<QS> for IsNull<Expr> where
    IsNull<Expr>: Expression,
    Expr: AppearsOnTable<QS>, 

impl<Expr> Expression for IsNull<Expr> where
    Expr: Expression, 

type SqlType = Bool

impl<Expr> NonAggregate for IsNull<Expr> where
    Expr: NonAggregate, 

impl<Expr, DB> QueryFragment<DB> for IsNull<Expr> where
    Expr: QueryFragment<DB>,
    DB: Backend, 

fn walk_ast(&self, out: AstPass<DB>) -> QueryResult<()>

fn to_sql(&self, out: &mut DB::QueryBuilder) -> QueryResult<()>

fn collect_binds(
    &self,
    out: &mut DB::BindCollector,
    metadata_lookup: &DB::MetadataLookup
) -> QueryResult<()>

fn is_safe_to_cache_prepared(&self) -> QueryResult<bool>