| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
| Cc: | Hannu Krosing <hannu(at)2ndquadrant(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, Josh Berkus <josh(at)agliodbs(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: pluggable compression support |
| Date: | 2013-06-17 05:47:53 |
| Message-ID: | 20130617054753.GH3753@eldon.alvh.no-ip.org |
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| Thread: | |
| Lists: | pgsql-hackers |
Simon Riggs wrote:
> On 15 June 2013 12:25, Hannu Krosing <hannu(at)2ndquadrant(dot)com> wrote:
>
> > additionally it *could* have the property Simon proposed earlier
> > of *uncompressed* pages having some predetermined size, so we
> > could retain optimisations of substring() even on compressed TOAST
> > values.
>
> That wasn't about having fixed size pages, it was about having a
> function to determine the split points. Reason being we want to use
> some intelligence to split up JSON and XML documents.
Maybe indexed compressed text would be useful:
http://pizzachili.dcc.uchile.cl/
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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