Re: CUBE seems a bit confused about ORDER BY
| От | Alexander Korotkov |
|---|---|
| Тема | Re: CUBE seems a bit confused about ORDER BY |
| Дата | |
| Msg-id | CAPpHfdukhbg49MHu-V3CkiHnU55NX2Z=quHEyu-GHzSR=OTiYg@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: CUBE seems a bit confused about ORDER BY (Teodor Sigaev <teodor@sigaev.ru>) |
| Ответы |
Re: CUBE seems a bit confused about ORDER BY
|
| Список | pgsql-hackers |
On Thu, Dec 14, 2017 at 1:36 PM, Teodor Sigaev <teodor@sigaev.ru> wrote:
Yes. I bet only few users have built indexes over ~> operator if any.
Ask them to reindex in the release notes seems OK for me.
Is there a good way to detect such cases? Either in pg_upgrade, so that
we can print warnings, or at least manually (which would be suitable for
release notes).
Hmm, suppose, fix should be backpatched (because now it's unusable) and pg_upgrade should not do anything. Just add release note to 10.0 and 11.0
Oh, check expression is affected too, users will need to reinsert data.
I wrote query to find both constraints and indexes depending on ~> cube operator.
SELECT dep.classid::regclass AS class,
CASE WHEN dep.classid = 'pg_catalog.pg_class'::regclass THEN dep.objid::regclass::text
WHEN dep.classid = 'pg_catalog.pg_constraint'::regclass THEN (SELECT conname FROM pg_catalog.pg_constraint WHERE oid = dep.objid)
ELSE NULL
END AS name
FROM
pg_catalog.pg_extension e
JOIN pg_catalog.pg_depend edep ON edep.refclassid = 'pg_catalog.pg_extension'::regclass AND edep.refobjid = e.oid AND deptype = 'e' AND edep.classid = 'pg_catalog.pg_operator'::regclass
JOIN pg_catalog.pg_operator o ON o.oid = edep.objid AND o.oprname = '~>'
JOIN pg_catalog.pg_depend dep ON dep.refclassid = 'pg_catalog.pg_operator'::regclass AND dep.refobjid = o.oid
WHERE
e.extname = 'cube' AND dep.classid IN ('pg_catalog.pg_constraint'::regclass, 'pg_catalog.pg_class'::regclass);
On the below data schema
create table tmp (c cube, check ((c ~> 0 > 0)));
create index tmp_idx on tmp ((c~>0));
it gives following result
class | name
---------------+-------------
pg_class | tmp_idx
pg_constraint | tmp_c_check
(2 rows)
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