| From: | Nathan Bossart <nathandbossart(at)gmail(dot)com> |
|---|---|
| To: | Alexander Lakhin <exclusion(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Michael Paquier <michael(at)paquier(dot)xyz> |
| Subject: | Re: Large expressions in indexes can't be stored (non-TOASTable) |
| Date: | 2024-09-20 16:51:50 |
| Message-ID: | Zu2oJtMI2avvjmtl@nathan |
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| Lists: | pgsql-hackers |
On Fri, Sep 20, 2024 at 07:00:00AM +0300, Alexander Lakhin wrote:
> I've found another two paths to reach that condition:
> CREATE INDEX CONCURRENTLY ON def (vec_quantizer(id, :'b'));
> ERROR: cannot fetch toast data without an active snapshot
>
> REINDEX INDEX CONCURRENTLY def_vec_quantizer_idx;
> (or REINDEX TABLE CONCURRENTLY def;)
> TRAP: failed Assert("HaveRegisteredOrActiveSnapshot()"), File: "toast_internals.c", Line: 668, PID: 2934502
Here's a (probably naive) attempt at fixing these, too. I'll give each
path a closer look once it feels like we've identified all the bugs.
> Perhaps it would make sense to check all CatalogTupleUpdate(pg_index, ...)
> calls (I've found 10 such instances, but haven't checked them yet).
Indeed.
--
nathan
| Attachment | Content-Type | Size |
|---|---|---|
| v2-0001-fix-failed-assertions-due-to-pg_index-s-TOAST-tab.patch | text/plain | 3.1 KB |
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