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help / color / mirror / Atom feedFrom: Nathan Bossart <[email protected]>
To: Jeff Davis <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: Ayush Vatsa <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: David G. Johnston <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Subject: Re: Clarification on Role Access Rights to Table Indexes
Date: Thu, 9 Oct 2025 10:39:32 -0500
Message-ID: <aOfXNAFkj_EFm-8q@nathan> (raw)
In-Reply-To: <[email protected]>
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On Wed, Oct 08, 2025 at 08:28:01PM -0700, Jeff Davis wrote:
> Actually, now I'm unsure. v4-0001 is taking a lock on the table before
> checking privileges, whereas v4-0002 is going to some effort to avoid
> that. Is that because the latter is taking a ShareLock?
I was confused by this, too. We seem to go to great lengths to avoid
taking a lock before checking permissions in RangeVarGetRelidExtended(),
but in pg_prewarm() and this stats code, we are taking the lock first.
pg_prewarm() can't use RangeVarGetRelid because you give it the OID, but
I'm not seeing why stat_utils.c can't use it. We should probably fix this.
I wouldn't be surprised if there are other examples.
--
nathan
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To: [email protected]
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Subject: Re: Clarification on Role Access Rights to Table Indexes
In-Reply-To: <aOfXNAFkj_EFm-8q@nathan>
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