"Kevin Grittner" <kevin.gritt...@wicourts.gov> writes:
> Tom Lane <t...@sss.pgh.pa.us> wrote:
>> This amounts to assuming that no new indexes get added to system
>> catalogs after initdb, or at least not during concurrent
>> operations wherein indcheckxmin would be important.
> Sounds reasonable, but can we enforce it through locks rather than
> assuming, or isn't there a clear way to do that without risking
> deadlocks?
Well, we already enforce it through the allow_system_table_mods mechanism:
regression=# create index foo on pg_index(indcheckxmin);
ERROR: permission denied: "pg_index" is a system catalog
Yes, you can turn that off if you try hard enough, but it's on your own
head to know the consequences.
regards, tom lane
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