Struct GroupBy 

pub struct GroupBy {
    pub expr: ExprRef,
    pub predicate: Option<ExprRef>,
}

GROUP BY clause specification

Defines how query results should be order by.

Examples

In GROUP BY e.age HAVING age > 123, this would be represented as:

• expr: expression for e.age
• predicate: age > 123

Fields

expr: ExprRef

Expression to group by

predicate: Option<ExprRef>

Predicate to filter groups after aggregation

Trait Implementations

impl Clone for GroupBy

fn clone(&self) -> GroupBy

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroupBy

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

Formats the value using the given formatter.

impl Serialize for GroupBy

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

where __S: Serializer,

Serialize this value into the given Serde serializer.