Function rollup

datafusion/expr/src/expr_fn.rs:325–327

Create a grouping set for rollup

(exprs: Vec<Expr>)

/// Create a grouping set for rollup
pub fn rollup(exprs: Vec<Expr>) -> Expr {
    Expr::GroupingSet(GroupingSet::Rollup(exprs))
}

/// Create a cast expression
pub fn cast(expr: Expr, data_type: DataType) -> Expr {