| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Justin Pryzby <pryzby(at)telsasoft(dot)com> |
| Cc: | Amit Langote <amitlangote09(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: ALTER tbl rewrite loses CLUSTER ON index |
| Date: | 2020-02-06 17:24:47 |
| Message-ID: | 20200206172447.GA28041@alvherre.pgsql |
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| Lists: | pgsql-hackers |
On 2020-Feb-06, Justin Pryzby wrote:
> I wondered if it wouldn't be better if CLUSTER ON was stored in pg_class as the
> Oid of a clustered index, rather than a boolean in pg_index.
Maybe. Do you want to try a patch?
> That likely would've avoided (or at least exposed) this issue.
> And avoids the possibility of having two indices marked as "clustered".
> These would be more trivial:
> mark_index_clustered
> /* We need to find the index that has indisclustered set. */
You need to be careful when dropping the index ...
--
Álvaro Herrera https://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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