Обсуждение: RE: Re: 7.1.2 ERROR: UNIQUE constraint matching given keys for referenced table ......
RE: Re: 7.1.2 ERROR: UNIQUE constraint matching given keys for referenced table ......
От
Stephan Szabo
Дата:
On Wed, 4 Jul 2001, Lincy Lin wrote: > Thanks your reply. > > Actully, We are using 4 fields (CompanySerialNo, BrahcnOffice, > DepartmentCategory, Department) to check employee work for which > company parimary. Well, we have many company here (In Taiwan) have > multi-company name but in same office. Some employee work for all > multi-company. But our system only allow one employee belong to one > company in this time. > > Create Table CompanyInfo > ( > CompanySerialNo Char(20) Parimary Key, > LocalName Text, > EnglishName Text, > ............................. > ............................. > ); > > Create Table DepartmentInfo > ( > CompanySerialNo Char(20) References CompanyInfo > On Update Cascade > On Delete Cascade, > BranchOffice Char(40) Default '', > DepartmentCategory Char(40) Default '', > Department Char(40) Default '' > /* Primary Key (CompanySerialNo, BranchOffice, > DepartmentCategory, Department) */ ); > > Create Table EmployeeInfo > ( > EmployeeNo Char(20) Primary Key, > LocalName Text, > FirstName Text, > LastName Text, > ........................... > ........................... > CompanySerialNo Char(20) References CompanyInfo > On Update Cascade > On Delete Cascade, > BranchOffice Char(40), /* References DepartmentInfo (BranchOffice) */ > /* On Update Cascade */ > /* On Delete Set Default, */ > DepartmentCategory Char(40), /* References DepartmentInfo (DepartmentCategory)*/ > /* On Update Cascade */ > /* On Delete Set Default, */ > Department Char(40), /* References DepartmentInfo (Department) */ > /* On Update Cascade */ > /* On Delete Set Default, */ > ........................... > ........................... > ); > > If > > 1. one company don't allow multi-department with same name > How to set the references in EmployeeInfo table ? > > 2. one company allow multi-department with same name (But not > with same BranchOffice and/or DepartmentCategory). > How to set the references in EmployeeInfo table ? Okay, since it looks like your key in DepartmentInfo is > /* Primary Key (CompanySerialNo, BranchOffice, > DepartmentCategory, Department) */ ); You should probably make sure the primary key is defined in DepartmentInfo and do something like FOREIGN KEY (CompanySerialNo, BranchOffice, DepartmentCategory, Department) REFERENCES DepartmentInfo as a table constraint in EmployeeInfo. > I think the postgresql from 7.0.3 to 7.1.2 have change some > basic rule. The old code work fine in 7.0.3 but not ok in 7.1.2. Yeah, 7.0.3 was technically broken. The spec requires the unique constraint, but we didn't check it yet.
Re: Re: 7.1.2 ERROR: UNIQUE constraint matching given keys for referenced table ......
От
eddie iannuccelli
Дата:
Regrading your discussion, at the end, what is the difference between a REFERENCE clause in a field definition and a FOREIGN KEY in the table definition ? What is the best solution to implement a classical foreign key in a table ? thanks Stephan Szabo wrote: > On Wed, 4 Jul 2001, Lincy Lin wrote: > > >> Thanks your reply. >> >> Actully, We are using 4 fields (CompanySerialNo, BrahcnOffice, >> DepartmentCategory, Department) to check employee work for which >> company parimary. Well, we have many company here (In Taiwan) have >> multi-company name but in same office. Some employee work for all >> multi-company. But our system only allow one employee belong to one >> company in this time. >> >> Create Table CompanyInfo >> ( >> CompanySerialNo Char(20) Parimary Key, >> LocalName Text, >> EnglishName Text, >> ............................. >> ............................. >> ); >> >> Create Table DepartmentInfo >> ( >> CompanySerialNo Char(20) References CompanyInfo >> On Update Cascade >> On Delete Cascade, >> BranchOffice Char(40) Default '', >> DepartmentCategory Char(40) Default '', >> Department Char(40) Default '' >> /* Primary Key (CompanySerialNo, BranchOffice, >> DepartmentCategory, Department) */ ); >> >> Create Table EmployeeInfo >> ( >> EmployeeNo Char(20) Primary Key, >> LocalName Text, >> FirstName Text, >> LastName Text, >> ........................... >> ........................... >> CompanySerialNo Char(20) References CompanyInfo >> On Update Cascade >> On Delete Cascade, >> BranchOffice Char(40), /* References DepartmentInfo (BranchOffice) */ >> /* On Update Cascade */ >> /* On Delete Set Default, */ >> DepartmentCategory Char(40), /* References DepartmentInfo (DepartmentCategory)*/ >> /* On Update Cascade */ >> /* On Delete Set Default, */ >> Department Char(40), /* References DepartmentInfo (Department) */ >> /* On Update Cascade */ >> /* On Delete Set Default, */ >> ........................... >> ........................... >> ); >> >> If >> >> 1. one company don't allow multi-department with same name >> How to set the references in EmployeeInfo table ? > > >> 2. one company allow multi-department with same name (But not >> with same BranchOffice and/or DepartmentCategory). >> How to set the references in EmployeeInfo table ? > > > > Okay, since it looks like your key in DepartmentInfo is > >> /* Primary Key (CompanySerialNo, BranchOffice, >> DepartmentCategory, Department) */ ); > > > You should probably make sure the primary key is defined in > DepartmentInfo and do something like > > FOREIGN KEY (CompanySerialNo, BranchOffice, DepartmentCategory, > Department) REFERENCES DepartmentInfo > > as a table constraint in EmployeeInfo. > > >> I think the postgresql from 7.0.3 to 7.1.2 have change some >> basic rule. The old code work fine in 7.0.3 but not ok in 7.1.2. > > > Yeah, 7.0.3 was technically broken. The spec requires the unique > constraint, but we didn't check it yet. > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html -- ************************************************** Eddie IANNUCCELLI - tel: 05 61 28 54 44 INRA, Laboratoire de Génétique Cellulaire Chemin de Borde Rouge - Auzeville -BP27 31326 Castanet Tolosan **************************************************
Hi, I plan to design DB through pgaccess, but later I will need to distribute a DB creation script so is there any command in pgsql to produce the DB creation script ? Thanks ************************************************** Eddie IANNUCCELLI - tel: 05 61 28 54 44 INRA, Laboratoire de Génétique Cellulaire Chemin de Borde Rouge - Auzeville -BP27 31326 Castanet Tolosan **************************************************
On Thu, Jul 05, 2001 at 11:16:50AM -0400, some SMTP stream spewed forth: > Hi, > > I plan to design DB through pgaccess, but later I will need to > distribute a DB creation script so is there any command in pgsql to > produce the DB creation script ? `man pg_dump` pg_dump -s gh > > Thanks > > ************************************************** > Eddie IANNUCCELLI - tel: 05 61 28 54 44
Re: Re: 7.1.2 ERROR: UNIQUE constraint matching given keys for referenced table ......
От
Stephan Szabo
Дата:
On Thu, 5 Jul 2001, eddie iannuccelli wrote:
> Regrading your discussion, at the end, what is the difference between a
> REFERENCE clause in a field definition and a FOREIGN KEY in the table
> definition ? What is the best solution to implement a classical foreign
> key in a table ?
"If a <column constraint definition> is specified that contains a
<references specification>, then it is equivalent to a <table constraint
definition> that contains the followin g<table constraint>:
CND FOREIGN KEY (C) <references specification> CA"
The only major difference that you generally have to worry about is
that table FOREIGN KEY constraints allow you to have multiple column
key references. It's similar to the difference between the column
and table level PRIMARY KEY specifications.
Generally I personally use the column level one for single column
keys and only use the table one for multiple column keys although that's
mostly a matter of style. I'm sure there are people that use the
table one for everything.
Thanks, I have change my code as you suggest. :) -----Original Message----- From: Stephan Szabo [mailto:sszabo@megazone23.bigpanda.com] Sent: Thursday, July 05, 2001 3:39 AM To: Lincy Lin Cc: pgsql-general@postgresql.org Subject: RE: [GENERAL] Re: 7.1.2 ERROR: UNIQUE constraint matching given keys for referenced table ...... On Wed, 4 Jul 2001, Lincy Lin wrote: > Thanks your reply. > > Actully, We are using 4 fields (CompanySerialNo, BrahcnOffice, > DepartmentCategory, Department) to check employee work for which > company parimary. Well, we have many company here (In Taiwan) have > multi-company name but in same office. Some employee work for all > multi-company. But our system only allow one employee belong to one > company in this time. > > Create Table CompanyInfo > ( > CompanySerialNo Char(20) Parimary Key, > LocalName Text, > EnglishName Text, > ............................. > ............................. > ); > > Create Table DepartmentInfo > ( > CompanySerialNo Char(20) References CompanyInfo > On Update Cascade > On Delete Cascade, > BranchOffice Char(40) Default '', > DepartmentCategory Char(40) Default '', > Department Char(40) Default '' > /* Primary Key (CompanySerialNo, BranchOffice, > DepartmentCategory, Department) */ ); > > Create Table EmployeeInfo > ( > EmployeeNo Char(20) Primary Key, > LocalName Text, > FirstName Text, > LastName Text, > ........................... > ........................... > CompanySerialNo Char(20) References CompanyInfo > On Update Cascade > On Delete Cascade, > BranchOffice Char(40), /* References DepartmentInfo (BranchOffice) */ > /* On Update Cascade */ > /* On Delete Set Default, */ > DepartmentCategory Char(40), /* References DepartmentInfo (DepartmentCategory)*/ > /* On Update Cascade */ > /* On Delete Set Default, */ > Department Char(40), /* References DepartmentInfo (Department) */ > /* On Update Cascade */ > /* On Delete Set Default, */ > ........................... > ........................... > ); > > If > > 1. one company don't allow multi-department with same name > How to set the references in EmployeeInfo table ? > > 2. one company allow multi-department with same name (But not > with same BranchOffice and/or DepartmentCategory). > How to set the references in EmployeeInfo table ? Okay, since it looks like your key in DepartmentInfo is > /* Primary Key (CompanySerialNo, BranchOffice, > DepartmentCategory, Department) */ ); You should probably make sure the primary key is defined in DepartmentInfo and do something like FOREIGN KEY (CompanySerialNo, BranchOffice, DepartmentCategory, Department) REFERENCES DepartmentInfo as a table constraint in EmployeeInfo. > I think the postgresql from 7.0.3 to 7.1.2 have change some > basic rule. The old code work fine in 7.0.3 but not ok in 7.1.2. Yeah, 7.0.3 was technically broken. The spec requires the unique constraint, but we didn't check it yet.