Обсуждение: changing sequence in serial field

Hello

I noticed, that some serial field is using wrong sequence, so I altered
the default value pointing to the sequence I want, but now I cant delete
currently no longer used sequence. Did I do someting wrong changing it?

PgSQL 8.1 on Gentoo Linux.


What I try to do
DROP SEQUENCE b_prekes_br_kodas_pbk_id_seq1;

Result
ERROR:  cannot drop sequence b_prekes_br_kodas_pbk_id_seq1 because table
b_prekes_br_kodas column pbk_id requires it
HINT:  You may drop table b_prekes_br_kodas column pbk_id instead.

********** Error **********

ERROR: cannot drop sequence b_prekes_br_kodas_pbk_id_seq1 because table
b_prekes_br_kodas column pbk_id requires it
SQL state: 2BP01
Hint: You may drop table b_prekes_br_kodas column pbk_id instead.

--
Julius Tuskenis
Programavimo skyriaus vadovas
UAB nSoft
mob. +37068233050

Στις Thursday 03 July 2008 17:19:48 ο/η Julius Tuskenis έγραψε:
> Hello
>
> I noticed, that some serial field is using wrong sequence, so I altered
> the default value pointing to the sequence I want, but now I cant delete
> currently no longer used sequence. Did I do someting wrong changing it?
>
> PgSQL 8.1 on Gentoo Linux.
>
>
> What I try to do
> DROP SEQUENCE b_prekes_br_kodas_pbk_id_seq1;

try
ALTER SEQUENCE b_prekes_br_kodas_pbk_id_seq1 OWNED BY NONE;
first, adn then drop.

>
> Result
> ERROR:  cannot drop sequence b_prekes_br_kodas_pbk_id_seq1 because table
> b_prekes_br_kodas column pbk_id requires it
> HINT:  You may drop table b_prekes_br_kodas column pbk_id instead.
>
> ********** Error **********
>
> ERROR: cannot drop sequence b_prekes_br_kodas_pbk_id_seq1 because table
> b_prekes_br_kodas column pbk_id requires it
> SQL state: 2BP01
> Hint: You may drop table b_prekes_br_kodas column pbk_id instead.
>
> --
> Julius Tuskenis
> Programavimo skyriaus vadovas
> UAB nSoft
> mob. +37068233050
>
>



--
Achilleas Mantzios

Hello Achilleas.

I think you are wrong on this point - I can create some sequence (the
owner is set) and then drop it easily. I think this is because

b_prekes_br_kodas_pbk_id_seq1 was created automatically creating serial field and is in some way connected to it. Thats
whyI get error saying "...column pbk_id requires it." Any way I can't find a way to find and alter this dependency. 



Achilleas Mantzios rašė:
> Στις Thursday 03 July 2008 18:19:27 ο/η Julius Tuskenis έγραψε:
>
>> Sorry - that doesnt work.
>>
> That was in 8.3.3
> Your mileage may vary. But the key is to get rid of the dependency.
>
>>> try
>>> ALTER SEQUENCE b_prekes_br_kodas_pbk_id_seq1 OWNED BY NONE;
>>> first, adn then drop.
>>>
>>>
>>>
>> ERROR:  syntax error at or near "OWNED"
>> LINE 1: ALTER SEQUENCE b_prekes_br_kodas_pbk_id_seq1 OWNED BY NONE;
>>                                                      ^
>>
>> ********** Error **********
>>
>> ERROR: syntax error at or near "OWNED"
>> SQL state: 42601
>> Character: 46
>>
>>
>> I also tried ALTER table b_prekes_br_kodas_pbk_id_seq1 OWNER TO NONE;
>> but this gives:
>>
>> ERROR:  role "none" does not exist
>>
>> ********** Error **********
>>
>> ERROR: role "none" does not exist
>> SQL state: 42704
>>
>>
>>
>
>
>
>

Achilleas Mantzios rašė:
> Στις Thursday 03 July 2008 17:19:48 ο/η Julius Tuskenis έγραψε:
>
>> Hello
>>
>> I noticed, that some serial field is using wrong sequence, so I altered
>> the default value pointing to the sequence I want, but now I cant delete
>> currently no longer used sequence. Did I do someting wrong changing it?
>>
>> PgSQL 8.1 on Gentoo Linux.
>>
>>
>> What I try to do
>> DROP SEQUENCE b_prekes_br_kodas_pbk_id_seq1;
>>
>
> try
> ALTER SEQUENCE b_prekes_br_kodas_pbk_id_seq1 OWNED BY NONE;
> first, adn then drop.
>
>
>> Result
>> ERROR:  cannot drop sequence b_prekes_br_kodas_pbk_id_seq1 because table
>> b_prekes_br_kodas column pbk_id requires it
>> HINT:  You may drop table b_prekes_br_kodas column pbk_id instead.
>>
>> ********** Error **********
>>
>> ERROR: cannot drop sequence b_prekes_br_kodas_pbk_id_seq1 because table
>> b_prekes_br_kodas column pbk_id requires it
>> SQL state: 2BP01
>> Hint: You may drop table b_prekes_br_kodas column pbk_id instead.
>>
>> --
>> Julius Tuskenis
>> Programavimo skyriaus vadovas
>> UAB nSoft
>> mob. +37068233050
>>
>>
>>
>
>
>
>


--
Julius Tuskenis
Programavimo skyriaus vadovas
UAB nSoft
mob. +37068233050

Julius Tuskenis <julius@nsoft.lt> writes:
> b_prekes_br_kodas_pbk_id_seq1 was created automatically creating serial field and is in some way connected to it.
Thatswhy I get error saying "...column pbk_id requires it." Any way I can't find a way to find and alter this
dependency.

It's a row in pg_depend.  In 8.2 and up you can create/delete the row
with ALTER SEQUENCE OWNED BY, but in earlier releases you'd have to do
it manually.

            regards, tom lane