Re: Materialized views WIP patch

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От Kevin Grittner
Тема Re: Materialized views WIP patch
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Msg-id 1361456750.11476.YahooMailNeo@web162902.mail.bf1.yahoo.com
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Ответ на Re: Materialized views WIP patch  (Peter Eisentraut <peter_e@gmx.net>)
Ответы Re: Materialized views WIP patch  (Peter Eisentraut <peter_e@gmx.net>)
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Peter Eisentraut <peter_e@gmx.net> wrote:
> On 2/20/13 11:14 PM, Greg Stark wrote:
>> That's not entirely true. From the database's point of view,
>> TRUNCATE is in many ways actually DDL.
>
> Whether something is DDL or DML or a read operation (query) is
> not an implementation detail, it's a user-exposed category.
> Since TRUNCATE is logically equivalent to DELETE, it's a DML
> operation, as far as the user is concerned.

Not really.  It doesn't follow the same MVCC behavior as DML.  This
is user-visible, documented behavior.

--
Kevin Grittner
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



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