Struct GroupingSet 

pub struct GroupingSet {
    pub kind: GroupingSetKind,
    pub groups: Vec<Expr>,
}

One grouping element that is itself a set: ROLLUP (a, b), CUBE (a, b), GROUPING SETS ((a), (b), ()).

From PostgreSQL 17’s grouping_element. Meant to be put into GroupBy::groups beside plain expressions.

Fields

kind: GroupingSetKind

Which kind of set.

groups: Vec<Expr>

The elements. For GROUPING SETS these are themselves usually Expr::Groups.

Implementations

impl GroupingSet

pub fn new(kind: GroupingSetKind, groups: impl IntoExprList) -> Self

A grouping element of kind over groups.

pub fn is_empty(&self) -> bool

Whether there is nothing to group.

Trait Implementations

impl Clone for GroupingSet

fn clone(&self) -> GroupingSet

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GroupingSet

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

Formats the value using the given formatter.

impl Default for GroupingSet

fn default() -> GroupingSet

Returns the “default value” for a type.

impl Expression for GroupingSet

fn write_sql(&self, w: &mut SqlWriter<'_>)

Append this fragment to w.