Re: Multiple-Table-Spanning Joins with ORs in WHERE Clause

From: "Sven R(dot) Kunze" <srkunze(at)mail(dot)de>
To: pgsql-performance(at)postgresql(dot)org
Subject: Re: Multiple-Table-Spanning Joins with ORs in WHERE Clause
Date: 2016-09-29 18:49:32
Message-ID: c6339356-6729-fc23-d6b2-ef4c85cc0686@mail.de
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On 29.09.2016 20:12, Pavel Stehule wrote:
> In ideal world then plan should be independent on used form. The most
> difficult is safe estimation of OR predicates. With correct estimation
> the transformation to UNION form should not be necessary I am think.

Ah, okay. That's interesting.

So how can I help here?

Regards,
Sven

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