Re: [Proposal] Fully WAL logged CREATE DATABASE - No Checkpoints

From: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com>, Maciek Sakrejda <m(dot)sakrejda(at)gmail(dot)com>, Bruce Momjian <bruce(at)momjian(dot)us>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: [Proposal] Fully WAL logged CREATE DATABASE - No Checkpoints
Date: 2022-03-16 04:53:33
Message-ID: CAFiTN-unG5zoJyXo_HSG7F6AtUvvn2_qQgWTsJ3ufcz4yPc8Pw@mail.gmail.com
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On Tue, Mar 15, 2022 at 11:09 PM Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
> On Tue, Mar 15, 2022 at 1:26 PM Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com> wrote:
> > > On Tue, Mar 15, 2022 at 12:30 PM Ashutosh Sharma <ashu(dot)coek88(at)gmail(dot)com> wrote:
> > > > Few comments on the latest patch:
> > > >
> > > > - /* We need to construct the pathname for this database */
> > > > - dbpath = GetDatabasePath(xlrec->dbid, xlrec->tsid);
> > > > + if (xlrec->dbid != InvalidOid)
> > > > + dbpath = GetDatabasePath(xlrec->dbid, xlrec->tsid);
> > > > + else
> > > > + dbpath = pstrdup("global");
> > > >
> > > > Do we really need this change? Is GetDatabasePath() alone not capable
> > > > of handling it?
> > >
> > > Well, I mean, that function has a special case for
> > > GLOBALTABLESPACE_OID, but GLOBALTABLESPACE_OID is 1664, and InvalidOid
> > > is 0.
> > >
> >
> > Wouldn't this be true only in case of a shared map file (when dbOid is
> > Invalid and tblspcOid is globaltablespace_oid) or am I missing
> > something?
>
> *facepalm*
>
> Good catch, sorry that I'm slow on the uptake today.
>
> v3 attached.

Thanks Ashutosh and Robert. Other pacthes cleanly applied on this
patch still generated a new version so that we can find all patches
together. There are no other changes.

--
Regards,
Dilip Kumar
EnterpriseDB: http://www.enterprisedb.com

Attachment Content-Type Size
v16-0002-Extend-relmap-interfaces.patch text/x-patch 4.1 KB
v16-0001-Refactor-relmap-load-and-relmap-write-functions.patch text/x-patch 8.9 KB
v16-0003-Allow-ReadBufferWithoutRelcache-to-support-unlog.patch text/x-patch 4.2 KB
v16-0004-New-interface-to-lock-relation-id.patch text/x-patch 2.2 KB
v16-0005-WAL-logged-CREATE-DATABASE.patch text/x-patch 44.4 KB
v16-0006-Support-create-database-strategy-in-createdb-too.patch text/x-patch 5.0 KB

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