Enum query_projector_traits::aggregates::SimpleAggregationOp

pub enum SimpleAggregationOp {
    Avg,
    Count,
    Max,
    Min,
    Sum,
}

Variants

AvgCountMaxMinSum

Methods

impl SimpleAggregationOp

pub fn to_sql(&self) -> &'static str

pub fn is_applicable_to_types(
    &self,
    possibilities: ValueTypeSet
) -> Result<ValueType>

With knowledge of the types to which a variable might be bound, return a Result to determine whether this aggregation is suitable. For example, it's valid to take the Avg of {Double, Long}, invalid to take Sum of {Instant}, valid to take (lexicographic) Max of {String}, but invalid to take Max of {Uuid, String}.

The returned type is the type of the result of the aggregation.

Trait Implementations

impl Clone for SimpleAggregationOp

fn clone(&self) -> SimpleAggregationOp

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for SimpleAggregationOp

impl Debug for SimpleAggregationOp

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

Formats the value using the given formatter.

impl Eq for SimpleAggregationOp

impl PartialEq for SimpleAggregationOp

fn eq(&self, __arg_0: &SimpleAggregationOp) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.