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From: Nico Williams <nico@cryptonector.com>
To: Peter Geoghegan <pg@bowt.ie>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: Robert Haas <robertmhaas@gmail.com>
Cc: Michael Paquier <michael.paquier@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Subject: Re: MERGE SQL Statement for PG11
Date: Tue, 7 Nov 2017 23:49:47 -0600
Message-ID: <20171108054946.GC4496@localhost> (raw)
In-Reply-To: <20171108004546.GB4496@localhost>
References: <20171101182032.GA7104@marmot>
	<CANP8+jJtsL3fYgiRWYB5vM9g98iFNHgBeCtPufUkgVShpEFvvg@mail.gmail.com>
	<20171102191636.GA27644@marmot>
	<CANP8+jKREJsXEGUvBTJTZk8WsAXyNjVEmXRwv0Z2MYtcbaQ8Ng@mail.gmail.com>
	<20171102210519.GA31574@marmot>
	<20171102220034.GV4496@localhost>
	<20171102222548.GA3581@marmot>
	<20171107232920.GZ4496@localhost>
	<CAH2-Wz=6k-5TbHn70BLv5bB24=-HhgV2u-yW34GqLXBjvHHoOg@mail.gmail.com>
	<20171108004546.GB4496@localhost>
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Ah, there is one reason not to use a mapping to CTEs to implement MERGE:
it might be faster to use a single query that is a FULL OUTER JOIN of the
source and target to drive the update/insert/delete operations.


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  Cc: nico@cryptonector.com, pg@bowt.ie, simon@2ndquadrant.com, robertmhaas@gmail.com, michael.paquier@gmail.com
  Subject: Re: MERGE SQL Statement for PG11
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