Struct diesel::dsl::now

pub struct now;

Represents the SQL CURRENT_TIMESTAMP constant. This is equivalent to the NOW() function on backends that support it.

Trait Implementations

impl Expression for now

type SqlType = Timestamp

The type that this expression represents in SQL

impl AsExpression<Nullable<Timestamp>> for now

type Expression = Coerce<now, Nullable<Timestamp>>

The expression being returned

fn as_expression(self) -> Self::Expression

Perform the conversion

impl<QS> AppearsOnTable<QS> for now where
    now: Expression, 

impl<QS> SelectableExpression<QS> for now where
    now: AppearsOnTable<QS>, 

impl NonAggregate for now

impl QueryId for now

type QueryId = now

A type which uniquely represents Self in a SQL query.

const HAS_STATIC_QUERY_ID: bool

Can the SQL generated by Self be uniquely identified by its type?

fn query_id() -> Option<TypeId>

Returns the type id of Self::QueryId if Self::HAS_STATIC_QUERY_ID. Returns None otherwise.

impl<DB: Backend> QueryFragment<DB> for now

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

Walk over this QueryFragment for all passes.

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

Converts this QueryFragment to its SQL representation.

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

Serializes all bind parameters in this query.

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

Is this query safe to store in the prepared statement cache?

impl Copy for now

impl Clone for now

fn clone(&self) -> now

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for now

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

Formats the value using the given formatter.

impl<Rhs> Add<Rhs> for now where
    Rhs: AsExpression<<<now as Expression>::SqlType as Add>::Rhs>, 

type Output = Add<Self, Rhs::Expression>

The resulting type after applying the + operator.

fn add(self, rhs: Rhs) -> Self::Output

Performs the + operation.

impl<Rhs> Sub<Rhs> for now where
    Rhs: AsExpression<<<now as Expression>::SqlType as Sub>::Rhs>, 

type Output = Sub<Self, Rhs::Expression>

The resulting type after applying the - operator.

fn sub(self, rhs: Rhs) -> Self::Output

Performs the - operation.