Re: (WIP) VACUUM REWRITE - CLUSTER by ctid

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От Itagaki Takahiro
Тема Re: (WIP) VACUUM REWRITE - CLUSTER by ctid
Дата
Msg-id 20091026115417.DBA5.52131E4D@oss.ntt.co.jp
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Ответ на Re: (WIP) VACUUM REWRITE - CLUSTER by ctid  (Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>)
Ответы New VACUUM FULL  (Itagaki Takahiro <itagaki.takahiro@oss.ntt.co.jp>)
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Heikki Linnakangas <heikki.linnakangas@enterprisedb.com> wrote:

> I got the impression that replacing VACUUM FULL is the most popular
> opinion. I like VACUUM REWRITE myself, except that it would require
> making REWRITE a reserved keyword.

My next proposal for the syntex is "VACUUM (options) table_name".
Since "options" are quoted by '(' and ')', we can add new options
without adding them into reserved keywords.

The traditional vacuum syntax:   VACUUM FULL FREEZE VERBOSE ANALYZE table_name (columns);
will be:   VACUUM (FULL, FREEZE, VERBOSE, ANALYZE) table_name (columns);

I think the syntax is consistent with existing syntex of "EXPLAIN (...)".
We can choose any keyword for the new "rewrite" version.
For example:   * VACUUM ( REWRITE )   * VACUUM ( FULL [ INPLACE | REPLACE ] )

Regards,
---
ITAGAKI Takahiro
NTT Open Source Software Center




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