Function resultForEmptyIter

server/doltgres_handler.go:581–590

resultForEmptyIter ensures that an expected empty iterator returns no rows.

(ctx *sql.Context, iter sql.RowIter)

// resultForEmptyIter ensures that an expected empty iterator returns no rows.
func resultForEmptyIter(ctx *sql.Context, iter sql.RowIter) (*Result, error) {
	defer trace.StartRegion(ctx, "DoltgresHandler.resultForEmptyIter").End()
	if _, err := iter.Next(ctx); err != io.EOF {
		return nil, errors.Errorf("result schema iterator returned more than zero rows")
	}
	if err := iter.Close(ctx); err != nil {
		return nil, err
	}
	return &Result{Fields: nil}, nil
}

// resultForMax1RowIter ensures that an empty iterator returns at most one row
func resultForMax1RowIter(ctx *sql.Context, schema sql.Schema, iter sql.RowIter, resultFields []pgproto3.FieldDescription, formatCodes []int16) (*Result, error) {