Re: BUG #13749: PostgreSQL cann't compress random data?

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: digoal(at)126(dot)com
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: BUG #13749: PostgreSQL cann't compress random data?
Date: 2015-10-30 15:12:57
Message-ID: 12879.1446217977@sss.pgh.pa.us
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digoal(at)126(dot)com writes:
> but when i use the other case, pgsql cann't compress the data, is the
> compress algorithm bug?

No compression algorithm can compress random data. (If you find that
one can, it means the data isn't really random.)

regards, tom lane

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