| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> |
| Cc: | Peter Geoghegan <pg(at)heroku(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Noah Misch <noah(at)leadboat(dot)com>, Marti Raudsepp <marti(at)juffo(dot)org>, Stephen Frost <sfrost(at)snowman(dot)net>, Greg Stark <stark(at)mit(dot)edu>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: B-Tree support function number 3 (strxfrm() optimization) |
| Date: | 2015-01-20 23:34:18 |
| Message-ID: | CA+TgmoajT4cA7X+giQBgzY44J-hs2bgL-8-77d4SjWTX-2AEEA@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Jan 20, 2015 at 6:27 PM, Andrew Gierth
<andrew(at)tao11(dot)riddles(dot)org(dot)uk> wrote:
>>>>>> "Robert" == Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> Robert> All right, it seems Tom is with you on that point, so after
> Robert> some study, I've committed this with very minor modifications.
>
> While hacking up a patch to demonstrate the simplicity of extending this
> to the Datum sorter, I seem to have run into a fairly major issue with
> this: there seems to be no attempt whatsoever to handle spilling to disk
> correctly. The data spilled to disk only has the un-abbreviated values,
> but nothing tries to re-abbreviate it (or disable abbreviations) when it
> is read back in, and chaos ensues:
Dear me. Peter, can you fix this RSN?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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