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

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Deserialize this value from the given Serde deserializer. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. 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 !=.

Serialize this value into the given Serde serializer. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

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.

Performs the conversion.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Performs the conversion.

Should always be Self

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.

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