Function postprocess

prqlc/prqlc/src/sql/pq/postprocess.rs:21–25

(query: SqlQuery, ctx: &mut Context)

type Sorting = Vec<ColumnSort<CId>>;

pub(super) fn postprocess(query: SqlQuery, ctx: &mut Context) -> SqlQuery {
    let query = infer_sorts(query, ctx);

    assign_names(query, ctx)
}

/// Pushes sorts down the pipelines and materializes them only where they are needed.
fn infer_sorts(query: SqlQuery, ctx: &mut Context) -> SqlQuery {