presto-parser/src/main/java/io/prestosql/sql/SqlFormatter.java/SqlFormatter/visitSingleColumn
class SqlFormatter:        @Override
        protected Void visitSingleColumn(SingleColumn node, Integer indent)
        {
            builder.append(formatExpression(node.getExpression()));
            if (node.getAlias().isPresent()) {
                builder.append(' ')
                        .append(formatExpression(node.getAlias().get()));
            }

            return null;
        }