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Re: [SQL] LIMIT 1 FOR UPDATE or FOR UPDATE LIMIT 1?

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Larry Rosenman <ler(at)lerctr(dot)org>,PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: [SQL] LIMIT 1 FOR UPDATE or FOR UPDATE LIMIT 1?
Date: 2002-08-28 14:41:16
Message-ID: 200208281441.g7SEfGE15627@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-sql
OK, applied with documenation updates showing only the new syntax.

---------------------------------------------------------------------------

Tom Lane wrote:
> Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> > Larry Rosenman wrote:
> >> Why? If both old and new are acceptable, why not document it? 
> >> (Just curious, I'm not wedded to it). 
> 
> > Well, showing both versions adds confusion for no good reason,
> 
> Yes, particularly considering that LIMIT ... FOR UPDATE corresponds
> to the implementation behavior (LIMIT acts before FOR UPDATE) while
> FOR UPDATE ... LIMIT does not.
> 
> I concur with documenting only the preferred form (though there should
> be a note in gram.y explaining that we're supporting the old syntax
> for backward compatibility).
> 
> 			regards, tom lane
> 

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