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From: Andrew Gierth <[email protected]>
To: Tom Lane <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Oliver Ford <[email protected]>
Cc: Krasiyan Andreev <[email protected]>
Subject: Re: Add RESPECT/IGNORE NULLS and FROM FIRST/LAST options
Date: Mon, 24 Sep 2018 01:26:44 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <CAGMVOdsbtRwE_4+v8zjH1d9xfovDeQAGLkP_B6k69_VoFEgX-A@mail.gmail.com>
	<[email protected]>
	<CAN1PwonR8uFAN-cCYRB1eReyNFNSdMtvJFYHWdmp=vCoGxuKdQ@mail.gmail.com>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>
	<[email protected]>

>>>>> "Tom" == Tom Lane <[email protected]> writes:

 >> select nth_value(x) from first ignore;

 Tom> No, because once IGNORE is a keyword, even unreserved, it's not
 Tom> legal as an AS-less alias.

That rule only applies in the select-list, not in the FROM clause; table
aliases in FROM are just ColId, so they can be anything except a fully
reserved or type_func_name keyword.

-- 
Andrew (irc:RhodiumToad)

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