From: | Darren Duncan <darren(at)darrenduncan(dot)net> |
---|---|
To: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: resolving SQL ambiguity (was Re: WIP: Allow SQL-lang funcs to ref params by param name) |
Date: | 2011-03-26 21:04:14 |
Message-ID: | 4D8E54CE.1060006@darrenduncan.net |
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Pavel Stehule wrote:
> sorry - I dislike this. The design is correct, but it is against to
> SQL verbosity. A reader must to thinking about missing tablenames. I
> dont't think so it is good solution, because it doesn't solve a
> backing compatibility problem - somebody must to fix a function still,
> and I think so it is much preferable to fix like:
>
> select (mytbl.mycol + myvar * myparam) as mynewcol from mytbl;
>
> your proposal saves a five chars, but it has a negative impacts on
> readability - there should be more tables.
>
> There are no reason to introduce a new concepts - SQL knows a aliases.
Well, going forward, I know I would much rather have to say "mytbl.mycol" than
have to say "myfunc.myparam". And I certainly would want to expect that when
one says "... as foo" that this "foo" is treated as a declaration unambiguously
and is never substituted for some parameter or there be other grief as I seem to
recall having in 8.4. -- Darren Duncan
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