Struct QueryBuilder 

pub struct QueryBuilder { /* private fields */ }

Builder used inside a schema crate. It is deliberately stateful: the closure describes one plan, then finish() returns plain serializable data.

Implementations

impl QueryBuilder

pub fn new(name: impl Into<String>, doc: impl Into<String>) -> Self

pub fn from<M: QueryModel>(&mut self) -> M::Fields

pub fn filter(&mut self, expr: BoolExpr)

pub fn group_by<T>(&mut self, field: &FieldExpr<T>)

pub fn field<T>( &mut self, name: impl Into<String>, field: &FieldExpr<T>, ) -> ColumnHandle<'_>

pub fn count(&mut self, name: impl Into<String>) -> ColumnHandle<'_>

pub fn count_of<T>( &mut self, name: impl Into<String>, field: &FieldExpr<T>, ) -> ColumnHandle<'_>

Count rows where the expression is non-null — the SQL COUNT(col) semantics; with a LEFT join this is how “0 related” stays 0.

pub fn count_distinct<T>( &mut self, name: impl Into<String>, field: &FieldExpr<T>, ) -> ColumnHandle<'_>

pub fn sum<T>( &mut self, name: impl Into<String>, field: &FieldExpr<T>, ) -> ColumnHandle<'_>

pub fn min<T>( &mut self, name: impl Into<String>, field: &FieldExpr<T>, ) -> ColumnHandle<'_>

pub fn max<T>( &mut self, name: impl Into<String>, field: &FieldExpr<T>, ) -> ColumnHandle<'_>

pub fn follow_in<M: QueryModel>( &mut self, anchor: u32, field: impl Into<String>, required: bool, ) -> M::Fields

JOIN: bind records of M whose OWN link field field points at the anchor binding’s record (SQL: FROM anchor JOIN M ON M.field = anchor). required: false is a LEFT join — anchor rows without a match keep one row with the M binding absent. The field name is a string until slice 3’s typed EdgeExpr; the registry gate validates it at emission.

pub fn follow_out<M: QueryModel>( &mut self, anchor: u32, field: impl Into<String>, required: bool, ) -> M::Fields

JOIN along a link field ON THE ANCHOR pointing out at records of M.

pub fn order_by<T>(&mut self, field: &FieldExpr<T>, direction: SortDirection)

pub fn order_by_column(&mut self, name: &str, direction: SortDirection)

Order by an output column’s expression (aggregates included).

pub fn limit(&mut self, limit: usize)

pub fn finish(self) -> QueryDecl