Reference column alias for common expressions

Hi,
Some databases (like Teradata) support the following syntax:

select col1, col2*20 as col2_1, col2_1*200 as col3_1 from your_table;

The last element in the target list can refer the second one using its alias.

This feature is similar to some programming languages (like Lisp)'s let*​.

For Postgres, it seems the only way is to write a subquery and then a new target list.

Will Postgres plan to support this feature?

Thanks a lot!