Struct GroupByPostprocessing

pub struct GroupByPostprocessing { /* private fields */ }

A group by expression

Implementations

impl GroupByPostprocessing

pub fn try_new( by_ids: Vec<Identifier>, aliased_exprs: Vec<AliasedResultExpr>, ) -> PostprocessingResult<Self>

Create a new group by expression containing the group by and aggregation expressions

pub fn group_by(&self) -> &[Identifier]

Get group by identifiers

pub fn remainder_exprs(&self) -> &[AliasedResultExpr]

Get remainder expressions for SELECT

pub fn aggregation_exprs( &self, ) -> &[(AggregationOperator, Expression, Identifier)]

Get aggregation expressions

Trait Implementations

impl Clone for GroupByPostprocessing

fn clone(&self) -> GroupByPostprocessing

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for GroupByPostprocessing

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for GroupByPostprocessing

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for GroupByPostprocessing

fn eq(&self, other: &GroupByPostprocessing) -> bool

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<S: Scalar> PostprocessingStep<S> for GroupByPostprocessing

fn apply( &self, owned_table: OwnedTable<S>, ) -> PostprocessingResult<OwnedTable<S>>

Apply the group by transformation to the given OwnedTable.

impl Serialize for GroupByPostprocessing

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for GroupByPostprocessing