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help / color / mirror / Atom feedFrom: Michael Paquier <[email protected]>
To: Ewan Young <[email protected]>
Cc: PostgreSQL Hackers <[email protected]>
Cc: Corey Huinker <[email protected]>
Subject: Re: Reject ill-formed range bounds histograms in pg_restore_attribute_stats()
Date: Tue, 7 Jul 2026 17:27:08 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAON2xHNM809WLR_g0ymKgU-tWxtbyH1Xvh4fqzRqy9YP2A59pg@mail.gmail.com>
References: <CAON2xHNM809WLR_g0ymKgU-tWxtbyH1Xvh4fqzRqy9YP2A59pg@mail.gmail.com>
On Tue, Jul 07, 2026 at 04:13:30PM +0800, Ewan Young wrote:
> pg_restore_attribute_stats() (and pg_set_attribute_stats()) stores a
> STATISTIC_KIND_BOUNDS_HISTOGRAM verbatim from user input, checking only
> that the argument is a one-dimensional, NULL-free array of the right
> type. It does not verify the invariant that ANALYZE's
> compute_range_stats() always establishes: the bounds histogram must
> contain no empty ranges, and its lower and upper bounds must each be
> sorted in ascending order.
I'll check that tomorrow. Thanks for the report.
--
Michael
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To: [email protected]
Cc: [email protected], [email protected], [email protected], [email protected]
Subject: Re: Reject ill-formed range bounds histograms in pg_restore_attribute_stats()
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