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From: Jeff Davis <[email protected]>
To: Nathan Bossart <[email protected]>
To: 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: Wed, 08 Oct 2025 20:28:01 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <CACX+KaO4R9QDxbPSxSB0jNXFsqA6Jf=UPS+tyUvT_YvuP_grVA@mail.gmail.com>
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	<CACX+KaP+6U9jf=GT4wpR7TvRvSMtTAhz=vP2Zr+ZdUFVZzqNsA@mail.gmail.com>
	<Z8y9RTT-vU6oVI_Y@nathan>
	<[email protected]>
	<Z8zwVmGzXyDdkAXj@nathan>
	<[email protected]>
	<Z88CB-vDehJ9rW8u@nathan>
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	<[email protected]>
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	<[email protected]>

On Wed, 2025-10-08 at 20:06 -0700, Jeff Davis wrote:
> On Wed, 2025-09-24 at 11:52 -0500, Nathan Bossart wrote:
> > On Wed, Sep 24, 2025 at 12:13:34PM -0400, Tom Lane wrote:
> > > Nathan Bossart <[email protected]> writes:
> > > > * RangeVarCallbackForReindexIndex() was checking privileges on
> > > > the table
> > > > before locking it, so I reversed it in 0002.
> > > 
> > > Don't we do that intentionally, to make sure someone can't cause
> > > DOS
> > > on a table they have no privileges on?
> > 
> > Ah, right.  I switched it back in v4.
> 
> v4-0001 looks good to me.

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?

Regards,
	Jeff Davis

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