Horton

Re: making relfilenodes 56 bits

Robert Haas <robertmhaas@gmail.com>

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From: Robert Haas <robertmhaas@gmail.com>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Dilip Kumar <dilipbalaut@gmail.com>, Andres Freund <andres@anarazel.de>, Heikki Linnakangas <hlinnaka@iki.fi>, Thomas Munro <thomas.munro@gmail.com>, pgsql-hackers <pgsql-hackers@postgresql.org>, vignesh C <vignesh21@gmail.com>
Date: 2022-07-29T19:57:17Z
Lists: pgsql-hackers 
On Fri, Jul 29, 2022 at 3:18 PM Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> On 2022-Jul-29, Robert Haas wrote:
> > Yeah, if we think it's OK to pass around structs, then that seems like
> > the right solution. Otherwise functions that take RelFileLocator
> > should be changed to take const RelFileLocator * and we should adjust
> > elsewhere accordingly.
>
> We do that in other places.  See get_object_address() for another
> example.  Now, I don't see *why* they do it.  I suppose there's
> notational convenience; for get_object_address() I think it'd be uglier
> with another out argument (it already has *relp).  For smgropen() it's
> not clear at all that there is any.
>
> For the new function, there's at least a couple of places that the
> calling convention makes simpler, so I don't see why you wouldn't use it
> that way.

All right, perhaps it's fine as Dilip has it, then.

-- 
Robert Haas
EDB: http://www.enterprisedb.com

Commits

  1. Fix typos in comments, code and documentation

  2. Increase width of RelFileNumbers from 32 bits to 56 bits.

  3. Move RelFileNumber declarations to common/relpath.h.

  4. Include RelFileLocator fields individually in BufferTag.

  5. Convert macros to static inline functions (buf_internals.h)

  6. Remove the restriction that the relmap must be 512 bytes.

  7. Change internal RelFileNode references to RelFileNumber or RelFileLocator.

  8. Reorder subskiplsn in pg_subscription to avoid alignment issues.

  9. Fix DROP {DATABASE,TABLESPACE} on Windows.

  10. Restructure smgr API as per recent proposal. smgr no longer depends on