Re: [HACKERS] Re: Improve OR conditions on joined columns (common star schema problem)

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>
Cc: Jim Nasby <jim(dot)nasby(at)openscg(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org
Subject: Re: [HACKERS] Re: Improve OR conditions on joined columns (common star schema problem)
Date: 2018-02-03 00:53:13
Message-ID: 5356.1517619193@sss.pgh.pa.us
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Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com> writes:
> BTW wouldn't it be possible to derive "traditional" proof in relational
> algebra, similarly to other transforms?

Perhaps. The patch depends on CTID, but you could probably model that
as a primary key in a proof.

regards, tom lane

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