Re: [ADMIN] CLUSTER and SERAIL type

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От Bruce Momjian
Тема Re: [ADMIN] CLUSTER and SERAIL type
Дата
Msg-id 200002111515.KAA16529@candle.pha.pa.us
обсуждение исходный текст
Ответ на CLUSTER and SERAIL type  (Mattias Norlander <mattias@umc.se>)
Ответы Unlimited data or variable  ("J Carlos Morales Duarte." <jcmd@acer.com.mx>)
Список pgsql-admin
So it seems it drops column defaults too.  Yikes.  I will add to manual
page.  Peter E. any chance of hacking this as part of DROP COLUMN?

> Reading the documentation on CLUSTER I see that
>
> "all grant permissions and other indexes are lost when clustering is
> performed."
>
> What does this really mean? I understand that all indexes and
> permissions are gone, but are there other impacts as well?
>
> Seems so to me that this also affects columns of type SERIAL and
> columns that defaults to a nextval('sequence'):
>
> --- X ---
>
> [PostgreSQL 6.5.3 on i386-unknown-freebsd3.1, compiled by gcc 2.7.2.1]
> ...
> test=> create table foo (id serial,name text);
> NOTICE:  CREATE TABLE will create implicit sequence 'foo_id_seq' for SERIAL column 'foo.id'
> NOTICE:  CREATE TABLE/UNIQUE will create implicit index 'foo_id_key' for table 'foo'
> CREATE
> test=> insert into foo(name) values('blah');
> INSERT 25021983 1
> test=> insert into foo(name) values('bleh');
> INSERT 25021984 1
> test=> insert into foo(name) values('bloh');
> INSERT 25021985 1
> test=> cluster foo_id_key on foo;
> CLUSTER
> test=> insert into foo(name) values('bluh');
> INSERT 25021999 1
> test=> select * from foo;
> id|name
> --+----
>  1|blah
>  2|bleh
>  3|bloh
>   |bluh
>
> --- X ---
>
> Grateful for explanations [and|or] workarounds !
>
>
> --
> Mattias Norlander
> mattias@umc.se
>
>
>
>
>
> ************
>
>


--
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