The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/10/static/features.html
Description:
CSV files can be huge. most commercial spreadsheets cannot handle it. there
are high-volume transactions such as for tax reporting which need a separate
copy (user can handle that) with columns dropped, maybe renamed (yeah, ALTER
shouldn't be so hard to use), and an SQL or SQL-like language for this would
be excellent.