On Wed, Apr 8, 2020 at 09:50:44PM +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/12/queries-table-expressions.html
> Description:
>
> The explanation of ROWS FROM is fairly terse and no examples are given.
>
> As it is essentially impossible to usefully search for this phrase, it would
> be helpful if at least a few examples were given.
Looking at this suggestion, this was all I could think of:
SELECT * FROM ROWS FROM (GENERATE_SERIES(1,10), GENERATE_SERIES(1, 15));
generate_series | generate_series
-----------------+-----------------
1 | 1
2 | 2
3 | 3
4 | 4
5 | 5
6 | 6
7 | 7
8 | 8
9 | 9
10 | 10
(null) | 11
(null) | 12
(null) | 13
(null) | 14
(null) | 15
The issue with adding an example is that it is hard to do something
simple and have it illustrate anything. Does this help?
--
Bruce Momjian <bruce@momjian.us> https://momjian.us
EnterpriseDB https://enterprisedb.com
The usefulness of a cup is in its emptiness, Bruce Lee