Struct expr::AggregateExpr [−][src]
pub struct AggregateExpr {
pub func: AggregateFunc,
pub expr: MirScalarExpr,
pub distinct: bool,
}
Expand description
Describes an aggregation expression.
Fields
func: AggregateFunc
Names the aggregation function.
expr: MirScalarExpr
An expression which extracts from each row the input to func
.
distinct: bool
Should the aggregation be applied only to distinct results in each group.
Implementations
Computes the type of this AggregateExpr
.
Returns whether the expression has a constant result.
Extracts unique input from aggregate type
Trait Implementations
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Adds names and types of the fields of the struct or enum to rti
. Read more
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
This method tests for !=
.
Auto Trait Implementations
impl RefUnwindSafe for AggregateExpr
impl Send for AggregateExpr
impl Sync for AggregateExpr
impl Unpin for AggregateExpr
impl UnwindSafe for AggregateExpr
Blanket Implementations
Mutably borrows from an owned value. Read more
Formats an object with the “alternative” format ({:#}
) and returns it.
Compare self to key
and return true
if they are equal.
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more