Function parse_group_by

nodedb-sql/src/planner/grouping_sets.rs:218–229

(sql: &str)

    use super::*;

    fn parse_group_by(sql: &str) -> GroupByExpr {
        use sqlparser::dialect::GenericDialect;
        use sqlparser::parser::Parser;
        let stmts = Parser::parse_sql(&GenericDialect {}, sql).unwrap();
        match stmts.into_iter().next().unwrap() {
            ast::Statement::Query(q) => match *q.body {
                ast::SetExpr::Select(s) => s.group_by,
                _ => panic!("expected SELECT"),
            },
            _ => panic!("expected query"),
        }
    }

    #[test]
    fn rollup_two_cols() {