Re: [ADMIN] CLUSTER and SERAIL type
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
|
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 > > > > > > ************ > > -- Bruce Momjian | http://www.op.net/~candle pgman@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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