| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Daniel Gustafsson <daniel(at)yesql(dot)se> |
| Cc: | Magnus Hagander <magnus(at)hagander(dot)net>, Michael Paquier <michael(at)paquier(dot)xyz>, Andres Freund <andres(at)anarazel(dot)de>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, PostgreSQL Developers <pgsql-hackers(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Online checksums patch - once again |
| Date: | 2020-06-26 12:12:30 |
| Message-ID: | CA+TgmoYZ4jTUEbQ_3_mZyDfXVV_fzDrNEMA1Uokc_Tw2R+Vyig@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Thu, Jun 25, 2020 at 5:43 AM Daniel Gustafsson <daniel(at)yesql(dot)se> wrote:
> Sorry being a bit thick, can you elaborate which case you're thinking about?
> CREATE TABLE sets the attribute according to the value of data_checksums, and
> before enabling checksums (and before changing data_checksums to inprogress)
> the bgworker will update all relhaschecksums from true (if any) to false. Once
> the state is set to inprogress all new relations will set relhaschecksums to
> true.
Oh, I think I was the one who was confused. I guess relhaschecksums
only really has meaning when we're in the process of enabling
checksums? So if we're in that state, then the Boolean tells us
whether a particular relation is done, and otherwise it doesn't
matter?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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