Function ImportComparator

db/writer.go:311–323

(sctx *super.Context, pool *Pool)

}

func ImportComparator(sctx *super.Context, pool *Pool) *expr.Comparator {
	var exprs []expr.SortExpr
	for _, s := range pool.SortKeys {
		exprs = append(exprs, expr.NewSortExpr(expr.NewDottedExpr(sctx, s.Key), s.Order, s.Order.NullsMax(true)))
	}
	var o order.Which
	if !pool.SortKeys.IsNil() {
		o = pool.SortKeys.Primary().Order
	}
	// valueAsBytes establishes a total order.
	exprs = append(exprs, expr.NewSortExpr(&valueAsBytes{}, o, o.NullsMax(true)))
	return expr.NewComparator(exprs...).WithMissingAsNull()
}

type valueAsBytes struct{}