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From: Erik Rijkers <er@xs4all.nl>
To: Peter Eisentraut <peter.eisentraut@2ndquadrant.com>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Cc: Sergei Kornilov <sk@zsrv.org>
Cc: Michael Paquier <michael.paquier@gmail.com>
Cc: Jaime Casanova <jaime.casanova@2ndquadrant.com>
Subject: Re: [HACKERS] generated columns
Date: Wed, 16 Jan 2019 22:40:59 +0100
Message-ID: <17fd00ff02ede468e2a3d63ff8cd5ff7@xs4all.nl> (raw)
In-Reply-To: <26129f50-cf47-2013-8f9b-e7a98853aa69@2ndquadrant.com>
References: <b151f851-4019-bdb1-699e-ebab07d2f40a@2ndquadrant.com>
	<CAJGNTeOxeQPFpEr35PME4yLayRzP_wwzt70kFrPztSTWHf-HDA@mail.gmail.com>
	<CAJGNTeM+MCjA4dBhAdjJ-vR_CwY3u65cCcc+KvnahzLHZjxjbw@mail.gmail.com>
	<1bc948f8-3bab-6c54-50af-c0723a75b85f@2ndquadrant.com>
	<20180116063546.GA3679@paquier.xyz>
	<48502d9b-60c4-5b10-40a2-e34f562132b4@2ndquadrant.com>
	<20180119051804.GC12826@paquier.xyz>
	<2e3d5147-16f8-af0f-00ab-4c72cafc896f@2ndquadrant.com>
	<20180131131804.GB1586@paquier.xyz>
	<bf9c8765-1aa0-432a-442e-45f715ebe4e7@2ndquadrant.com>
	<20180202022532.GA84623@paquier.xyz>
	<050e663d-d915-f61b-af96-5a09c10ade02@2ndquadrant.com>
	<79e4de23-52e3-2c45-9ba0-5f6932f590aa@2ndquadrant.com>
	<28574501540912440@iva5-750e13568e4d.qloud-c.yandex.net>
	<2ddd0bfa-0fcd-35ec-266c-f03cf72fc581@2ndquadrant.com>
	<26129f50-cf47-2013-8f9b-e7a98853aa69@2ndquadrant.com>

I couldn't compile v7-0001 and I am testing with the older v6-0001 (of 
which I still had an instance).

So the problem below may have been fixed already.

If you add a generated column to a file_fdw foreign table, it works OK 
wih VIRTUAL (the default) but with STORED it adds an empty column, 
silently.  I would say it would make more sense to get an error.


Erik Rijkers

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