| From: | Julien Rouhaud <rjuju123(at)gmail(dot)com> |
|---|---|
| To: | Peter Geoghegan <pg(at)bowt(dot)ie> |
| Cc: | Craig Ringer <craig(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, Álvaro Herrera <alvherre(at)2ndquadrant(dot)com>, abhijit Menon-Sen <ams(at)2ndquadrant(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Pavan Deolasee <pavan(dot)deolasee(at)2ndquadrant(dot)com> |
| Subject: | Re: [PATCH] pageinspect function to decode infomasks |
| Date: | 2017-07-20 06:13:02 |
| Message-ID: | CAOBaU_ac882pn-m+VisFHCycyZJmOZYz5pVh6c0VDxEPPK04fg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jul 20, 2017 at 5:44 AM, Peter Geoghegan <pg(at)bowt(dot)ie> wrote:
> On Wed, Jul 19, 2017 at 8:33 PM, Craig Ringer <craig(at)2ndquadrant(dot)com> wrote:
>> That's silly, so here's a patch to teach pageinspect how to decode infomasks
>> to a human readable array of flag names.
>>
>> Example:
>>
>> SELECT t_infomask, t_infomask2, flags
>> FROM heap_page_items(get_raw_page('test1', 0)),
>> LATERAL heap_infomask_flags(t_infomask, t_infomask2, true) m(flags);
>> t_infomask | t_infomask2 | flags
>> ------------+-------------+----------------------------------------------------------------------------
>> 2816 | 2 |
>> {HEAP_XMIN_COMMITTED,HEAP_XMIN_INVALID,HEAP_XMAX_INVALID,HEAP_XMIN_FROZEN}
>> (1 row)
>
> Seems like a good idea to me.
>
+1, it'll be really helpful.
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