Re: [HACKERS] Custom compression methods

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Justin Pryzby <pryzby(at)telsasoft(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Dilip Kumar <dilipbalaut(at)gmail(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, David Steele <david(at)pgmasters(dot)net>, Ildus Kurbangaliev <i(dot)kurbangaliev(at)gmail(dot)com>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: [HACKERS] Custom compression methods
Date: 2021-03-22 18:10:48
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Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I think this is significantly cleaner than what we have now, and I
> also prefer it to your proposal.

+1 in general. However, I suspect that you did not try to compile
this without --with-lz4, because if you had you'd have noticed the
other uses of NO_LZ4_SUPPORT() that you broke. I think you need
to leave that macro where it is. Also, it's not nice for GUC check
functions to throw ereport(ERROR); we prefer the caller to be able
to decide if it's a hard error or not. That usage should be using
GUC_check_errdetail() or a cousin, so it can't share the macro anyway.

regards, tom lane

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