Re: GIN pending list clean up exposure to SQL

From: Jaime Casanova <jaime(dot)casanova(at)2ndquadrant(dot)com>
To: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
Cc: Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: GIN pending list clean up exposure to SQL
Date: 2015-11-19 16:47:33
Message-ID: CAJGNTePqJR7=UDg07sOTTeXNTQ7Lh247KXeV4ryXb_-GCYL55A@mail.gmail.com
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On 19 November 2015 at 14:18, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> Alvaro Herrera wrote:
>> Jeff Janes wrote:
>> > I've written a function which allows users to clean up the pending list.
>> > It takes the index name and returns the number of pending list pages
>> > deleted.
>>
>> I just noticed that your patch uses AccessShareLock on the index. Is
>> that okay? I would have assumed that you'd need ShareUpdateExclusive
>> (same as vacuum uses), but I don't really know. Was that a carefully
>> thought-out choice?
>
> After reading gitPendingCleanup it becomes clear that there's no need
> for a stronger lock than what you've chosen. Jaime Casanova just
> pointed this out to me.
>

But it should do some checks, no?
- only superusers?
- what i received as parameter is a GIN index?

--
Jaime Casanova www.2ndQuadrant.com
Professional PostgreSQL: Soporte 24x7 y capacitación

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