Обсуждение: The examples given in Chapter 14 are not true.

The following documentation comment has been logged on the website:

Page: https://www.postgresql.org/docs/16/performance-tips.html
Description:

1) How did you create the `tenk1` table? If you will claim that from the
source code of version 9.3, the question arises how CREATE TABLE tenk1 (...)
WITH OIDS; in v16?


https://github.com/postgres/postgres/blob/524440579f838b30579f35d2045cc01b6f5070d8/src/test/regress/sql/create_table.sql#L37

Additionally, you have to spend time searching for additional and completely
unnecessary information and old versions of the code, although you have just
installed server version 16 from the source code, which has passed all
checks - but as it turns out is not compatible with the documentation.

After `make installcheck` v16 - All 215 tests passed. But 

1) relpages for table `tenk1` - different in version 16. Some calculations
will be incorrect accordingly
2) you will not be able to reproduce examples for which there are no indexes
in table `tenk1` - for example index `index_tenk1_on_four`.
3) How do you see this familiarization with the product through
documentation that points to older versions that work very differently in
the new version?

PG Doc comments form <noreply@postgresql.org> writes:
> Page: https://www.postgresql.org/docs/16/performance-tips.html

> 1) How did you create the `tenk1` table?

As the text says, it's supposed to be made by running the core
regression tests ("make installcheck").

> 1) relpages for table `tenk1` - different in version 16. Some calculations
> will be incorrect accordingly
> 2) you will not be able to reproduce examples for which there are no indexes
> in table `tenk1` - for example index `index_tenk1_on_four`.

Yeah, that's a bit out of date.  I fixed it up awhile ago for v17:

https://git.postgresql.org/gitweb/?p=postgresql.git&a=commitdiff&h=5caa05749

However, the text also points out that you won't necessarily get
exactly the same results as are shown, for assorted reasons of
which different-version is only one.  So I think these changes
were more neatnik-ism than rescuing the chapter from total
irrelevancy.

            regards, tom lane