Re: [PATCH] 8.5 plpgsql change for named notation: treat word following AS keyword as label v2

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Steve Prentice <prentice(at)cisco(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: [PATCH] 8.5 plpgsql change for named notation: treat word following AS keyword as label v2
Date: 2009-05-21 19:06:19
Message-ID: 162867790905211206s1d96379br706fb5382ce7c6ab@mail.gmail.com
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2009/5/21 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>:
> 2009/5/21 Josh Berkus <josh(at)agliodbs(dot)com>:
>>
>>> The patch adds the "AS" keyword to the plpgsql grammar and doesn't
>>> assign an expression parameter to the sql construct if the scalar
>>> follows the AS keyword.
>>
>> Would it be possible to also support "=" as well as "as"?  I believe that
>> SQL Server uses "=" exclusively, and supporting that syntax would help
>> people port TSQL-based applications.
>>
>
> No, it not possible, or not simply . This is ambiguous. a = 10 should
> be normal boolean expression. I didn't use T-SQL many years, but I
> thing, so in T-SQL this problem is solved with variables prefixes @.

there are not technical problem - there are semantic problem

Pavel

>
> regards
> Pavel Stehule
>
>> --
>> Josh Berkus
>> PostgreSQL Experts Inc.
>> www.pgexperts.com
>>
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