Re: Query cost
From: Alexander Langer <alexander.langer_at_address.invalid>
Date: Mon, 11 Nov 2013 13:40:01 +0100
Message-ID: <l5qj70$lvf$1_at_solani.org>
Date: Mon, 11 Nov 2013 13:40:01 +0100
Message-ID: <l5qj70$lvf$1_at_solani.org>
Am 08.11.2013 16:33, schrieb jemanuelcabral_at_gmail.com:
> Divison is not a primitive operation; It is implemented using a equivalent RA expression
> ΠR−S((ΠR−S(r)×s)−ΠR−S,S(r))
Explain the operator Π - is it projection ?
In general it depends on implementation of the operations. You know the big O Notation ? Received on Mon Nov 11 2013 - 13:40:01 CET