Re: Querying foreign table with SP-GiST index results in “ERROR: cache lookup failed for type 0”
| От | Joao Ferreira |
|---|---|
| Тема | Re: Querying foreign table with SP-GiST index results in “ERROR: cache lookup failed for type 0” |
| Дата | |
| Msg-id | 578490000.3108136.1560865625299@mail.yahoo.com обсуждение исходный текст |
| Ответ на | Re: Querying foreign table with SP-GiST index results in “ERROR: cache lookup failed for type 0” (Jeff Janes <jeff.janes@gmail.com>) |
| Список | pgsql-bugs |
Thank you Jeff.
I'll create the index on the geometry column as gist instead of spgist. On my first impression it seems to work fine ;)
Cheers,
João Ferreira
On Tuesday, June 18, 2019, 01:22:27 PM GMT+1, Jeff Janes <jeff.janes@gmail.com> wrote:
On Tue, Jun 18, 2019 at 8:02 AM Joao Ferreira <jpgferreira@yahoo.com> wrote:
Greetings,I'm using PostgreSQL 11.3 and I want to access a table in another Postgres database using postgres_fdw but since the original table has an SP-GiST index on a geometry column, the query on the foreign table fails with "ERROR: cache lookup failed for type 0", even if the table is empty (Step 7). This doesn't happen if the query is done directly to the remote table (Steps 3 and 6) or if the remote table doesn't have the index (Steps 3 and 4).
I've verified this on ubuntu 18.04 with 11.3 installed from PGDG apt repo, and attached a single-file reproduction.
If I change from sp-gist to just gist, there is no problem. And if I change to indexing a built-in sp-gist operator class (point rather than geom), there is also no problem.
Getting postgis to compile is a bit hard and slow, so I haven't completed any tests against the unreleased versions yet.
Cheers,
Jeff
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