Re: MAIN, Uncompressed?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: MAIN, Uncompressed?
Date: 2017-08-25 11:24:53
Message-ID: 12781.1503660293@sss.pgh.pa.us
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Simon Riggs <simon(at)2ndquadrant(dot)com> writes:
> It looks like we need a new Column Storage option for MAIN, Uncompressed.
> We have these Column Storage options
> Plain - inline only, uncompressed
> Main - inline until external as last resort, compressible
> External - external, uncompressed
> Extended - external, compressible

> So there is no option for Main, but not compressible...

Doesn't Plain serve the purpose?

In point of fact, though, "never inline and never compress" is not really
a useful option, as it can be more easily read as "fail on wide values".

regards, tom lane

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