docs: Table 9.46. UUID Extraction Functions
On
https://www.postgresql.org/docs/18/functions-uuid.html
there is:
Table 9.46. UUID Extraction Functions
which has these examples:
uuid_extract_version('41db1265-8bc1-4ab3-992f-885799a4af1d'::uuid) → 4
uuid_extract_version('019535d9-3df7-79fb-b466-fa907fa17f9e'::uuid) → 7
In my hands, copy/pasting from the website page html intto psql these
don't work:
------
testdb=# select
uuid_extract_version('41db1265-8bc1-4ab3-992f-885799a4af1d'::uuid);
ERROR: invalid input syntax for type uuid:
"41db1265-8bc1-4ab3-992f-885799a4af1d"
LINE 1: select uuid_extract_version('41db1265-8bc1-4ab3-992f-885799...
------
Apparently, that's because of the dash characters used: if I re-type
those with simple keyboard-minus chars, the statement works as expected.
If I copy/paste the result values of the previous table (9.45. UUID
Generation Functions) into the uuid_extract_version() function, then the
examples work so there the dash-characters are apparently ok.
Also, the copy/paste from the PDF text works without problem.
This formatting error, if that's what it is, occurs on docs of both 18
and 19devel.
It's not a huge problem but it would be nice to fix the sgml so that it
generates copy/paste runnable examples here.
Thanks,
Erik Rijkers
On 4 Sep 2025, at 11:54, Erik Rijkers <er@xs4all.nl> wrote:
In my hands, copy/pasting from the website page html intto psql these don't work:
------
testdb=# select uuid_extract_version('41db1265-8bc1-4ab3-992f-885799a4af1d'::uuid);
ERROR: invalid input syntax for type uuid: "41db1265-8bc1-4ab3-992f-885799a4af1d"
LINE 1: select uuid_extract_version('41db1265-8bc1-4ab3-992f-885799...
------Apparently, that's because of the dash characters used: if I re-type those with simple keyboard-minus chars, the statement works as expected.
I believe it is because there is a &zwsp; encoded before the last group, which
was added in a6524105d20b in order to aid line breaking.
If I copy/paste the result values of the previous table (9.45. UUID Generation Functions) into the uuid_extract_version() function, then the examples work so there the dash-characters are apparently ok.
There is no zero-width-space character there since those lines aren't long
enough to cause line breaks.
It's not a huge problem but it would be nice to fix the sgml so that it generates copy/paste runnable examples here.
Agreed, it would be a nice to have, but not a showstopper.
--
Daniel Gustafsson