From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
---|---|
To: | Stephen Frost <sfrost(at)snowman(dot)net> |
Cc: | David Fetter <david(at)fetter(dot)org>, Hannu Krosing <hannu(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: DO ... RETURNING |
Date: | 2013-06-11 03:55:48 |
Message-ID: | CAFj8pRAG5mLvo_yWw10gJ=QOKkDfj4d0iuTWraXwK1Gw1b6SXw@mail.gmail.com |
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2013/6/10 Stephen Frost <sfrost(at)snowman(dot)net>:
> * Pavel Stehule (pavel(dot)stehule(at)gmail(dot)com) wrote:
>> not too much. Two different concepts in one statement is not good
>> idea.
>
> What are the different concepts..? We already have set returning
> functions, why would set returning anonymous functions be any different?
1. DO as function
2. DO as batch
>
>> What using a cursors as temporary solution?
>
> That only works when you want to just return the results of a table.
> What if you want to construct the data set in the DO block? Okay, fine,
> you could use a temp table, but what if you don't have rights to create
> temporary tables?
>
>> Still I don't like this idea, because you should to support DO
>> RETURNING in other statements - like INSERT INTO DO RETURNING ???
>
> That would certainly be neat, but it doesn't have to be there in the
> first incarnation, or really, ever, if it turns out to be painful to do.
>
this is reason, why I dislike it - It is introduce significant strange
SQL extension
>> What about local temporary functions ??
>
> You can already create temporary functions by simply creating them in
> pg_temp. I'd like to see us add explicit support for them though, but I
> don't see this as related to the DO-RETURNING question.
I don't think we have to introduce a new NON ANSI concept, when is
possible using current feature.
so for me -1
Pavel
>
> Thanks,
>
> Stephen
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