`pub struct now;`

## Expand description

Represents the SQL `CURRENT_TIMESTAMP`

constant. This is equivalent to the
`NOW()`

function on backends that support it.

## Trait Implementations§

source§### impl<Rhs> Add<Rhs> for nowwhere
Rhs: AsExpression<<<now as Expression>::SqlType as Add>::Rhs>,

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

§#### type Output = Add<now, <Rhs as AsExpression<<<now as Expression>::SqlType as Add>::Rhs>>::Expression>

#### type Output = Add<now, <Rhs as AsExpression<<<now as Expression>::SqlType as Add>::Rhs>>::Expression>

The resulting type after applying the

`+`

operator.source§### impl AsExpression<Nullable<Timestamp>> for now

### impl AsExpression<Nullable<Timestamp>> for now

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

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

The expression being returned

source§#### fn as_expression(self) -> Self::Expression

#### fn as_expression(self) -> Self::Expression

Perform the conversion

source§### impl AsExpression<Nullable<Timestamptz>> for now

Available on **crate feature **`postgres`

only.

### impl AsExpression<Nullable<Timestamptz>> for now

Available on

**crate feature**only.`postgres`

§#### type Expression = Coerce<now, Nullable<Timestamptz>>

#### type Expression = Coerce<now, Nullable<Timestamptz>>

The expression being returned

source§#### fn as_expression(self) -> Self::Expression

#### fn as_expression(self) -> Self::Expression

Perform the conversion

source§### impl AsExpression<Nullable<Timestamptz>> for now

Available on **crate feature **`sqlite`

only.

### impl AsExpression<Nullable<Timestamptz>> for now

Available on

**crate feature**only.`sqlite`

§#### type Expression = Coerce<now, Nullable<Timestamptz>>

#### type Expression = Coerce<now, Nullable<Timestamptz>>

The expression being returned

source§#### fn as_expression(self) -> Self::Expression

#### fn as_expression(self) -> Self::Expression

Perform the conversion

source§### impl AsExpression<Timestamptz> for now

Available on **crate feature **`postgres`

only.

### impl AsExpression<Timestamptz> for now

Available on

**crate feature**only.`postgres`

§#### type Expression = Coerce<now, Timestamptz>

#### type Expression = Coerce<now, Timestamptz>

The expression being returned

source§#### fn as_expression(self) -> Self::Expression

#### fn as_expression(self) -> Self::Expression

Perform the conversion

source§### impl AsExpression<Timestamptz> for now

Available on **crate feature **`sqlite`

only.

### impl AsExpression<Timestamptz> for now

Available on

**crate feature**only.`sqlite`

§#### type Expression = Coerce<now, Timestamptz>

#### type Expression = Coerce<now, Timestamptz>

The expression being returned

source§#### fn as_expression(self) -> Self::Expression

#### fn as_expression(self) -> Self::Expression

Perform the conversion

source§### impl Expression for now

### impl Expression for now

source§### impl QueryId for now

### impl QueryId for now

source§#### const HAS_STATIC_QUERY_ID: bool = true

#### const HAS_STATIC_QUERY_ID: bool = true

Can the SQL generated by

`Self`

be uniquely identified by its type? Read moresource§### impl<Rhs> Sub<Rhs> for nowwhere
Rhs: AsExpression<<<now as Expression>::SqlType as Sub>::Rhs>,

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

§#### type Output = Sub<now, <Rhs as AsExpression<<<now as Expression>::SqlType as Sub>::Rhs>>::Expression>

#### type Output = Sub<now, <Rhs as AsExpression<<<now as Expression>::SqlType as Sub>::Rhs>>::Expression>

The resulting type after applying the

`-`

operator.source§### impl<__GroupByClause> ValidGrouping<__GroupByClause> for now

### impl<__GroupByClause> ValidGrouping<__GroupByClause> for now

§#### type IsAggregate = Never

#### type IsAggregate = Never

Is this expression aggregate? Read more

### impl<QS> AppearsOnTable<QS> for nowwhere now: Expression,

### impl Copy for now

### impl<QS> SelectableExpression<QS> for nowwhere now: AppearsOnTable<QS>,

## Auto Trait Implementations§

### impl RefUnwindSafe for now

### impl Send for now

### impl Sync for now

### impl Unpin for now

### impl UnwindSafe for now

## Blanket Implementations§

source§### impl<T, ST> AsExpression<ST> for Twhere
T: Expression<SqlType = ST>,
ST: SqlType + TypedExpressionType,

### impl<T, ST> AsExpression<ST> for Twhere T: Expression<SqlType = ST>, ST: SqlType + TypedExpressionType,

§#### type Expression = T

#### type Expression = T

The expression being returned

source§#### fn as_expression(self) -> T

#### fn as_expression(self) -> T

Perform the conversion

source§### impl<Conn, DB, T> ExecuteDsl<Conn, DB> for Twhere
Conn: Connection<Backend = DB>,
DB: Backend,
T: QueryFragment<DB, NotSpecialized> + QueryId,

### impl<Conn, DB, T> ExecuteDsl<Conn, DB> for Twhere Conn: Connection<Backend = DB>, DB: Backend, T: QueryFragment<DB, NotSpecialized> + QueryId,

source§### impl<T> IntoSql for T

### impl<T> IntoSql for T

source§#### fn into_sql<T>(self) -> AsExprOf<Self, T>where
Self: AsExpression<T> + Sized,
T: SqlType + TypedExpressionType,

#### fn into_sql<T>(self) -> AsExprOf<Self, T>where Self: AsExpression<T> + Sized, T: SqlType + TypedExpressionType,

Convert

`self`

to an expression for Diesel’s query builder. Read moresource§#### fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>where
&'a Self: AsExpression<T>,
T: SqlType + TypedExpressionType,

#### fn as_sql<'a, T>(&'a self) -> AsExprOf<&'a Self, T>where &'a Self: AsExpression<T>, T: SqlType + TypedExpressionType,

Convert

`&self`

to an expression for Diesel’s query builder. Read more