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From "Suman N" <Suma...@curamsoftware.com>
Subject RE: Getting "Constraints 'SQL071017145943950' and 'SQL071017145906390' have the same set of columns, which is not allowed." while adding a Unique/primary key constraint to the table
Date Thu, 18 Oct 2007 06:10:01 GMT
Hi Craig,

 

Thank you very much for the response. This made it very clear.

 

Thanks, 

Suman

 

 

________________________________

From: Craig.Russell@Sun.COM [mailto:Craig.Russell@Sun.COM] 
Sent: Wednesday, October 17, 2007 9:03 PM
To: Derby Discussion
Subject: Re: Getting "Constraints 'SQL071017145943950' and
'SQL071017145906390' have the same set of columns, which is not
allowed." while adding a Unique/primary key constraint to the table

 

Hi Suman,

 

You do not get any extra value from II or IV. It's sufficient to have
the primary key on the two columns. That gives you uniqueness for the
columns and so an extra uniqueness constraint is redundant, and, well,
erroneous.

 

Craig

 

On Oct 17, 2007, at 3:46 AM, Suman N wrote:





Hi,

I have executed the following queries on a table in the given order and
I am getting the error mentioned below.

I have created a table and then created an unique index on two columns
for the table.

I have used the same two columns to add a primary key for the table and
then used a query to set the two columns with unique key constraint.

CREATE TABLE XSLTEMPLATE_TEMP(TEMPLATEID BIGINT not null,
LOCALEIDENTIFIER CHARACTER(5) not null, TEMPLATENAME CHARACTER(100),
LATESTVERSION INT not null, CHECKEDOUT CHARACTER(1) not null,
CHECKEDOUTBY CHARACTER(30), CHECKEDOUTVERSION INT not null,
CHECKEDOUTTIME TIMESTAMP, COCOMMENT VARCHAR(300), TEMPLATEFILE
VARCHAR(300), TEMPLATETYPE CHARACTER(10), TEMPLATEIDCODE CHARACTER(10),
EDITABLE CHARACTER(1) not null, RELATESTO CHARACTER(10), LASTWRITTEN
TIMESTAMP);

CREATE UNIQUE INDEX XSLTEMPLATE_TEMP ON XSLTEMPLATE_TEMP(TEMPLATEID,
LOCALEIDENTIFIER);

ALTER TABLE XSLTEMPLATE_TEMP ADD CONSTRAINT XSLTEMPLATE_TEMP PRIMARY
KEY(TEMPLATEID, LOCALEIDENTIFIER);

ALTER TABLE XSLTEMPLATE_TEMP ADD UNIQUE (LOCALEIDENTIFIER, TEMPLATEID);

When the last query to add a unique key constraint on the table, I am
getting the following error

ERROR 42Z93: Constraints 'SQL071017145943950' and 'SQL071017145906390'
have the same set of columns, which is not allowed.

Either of the query iii or query iv alone could be executed
successfully. I was not able to execute both these queries

Can anyone please explain why I am getting this error and also suggest
what needs to be done to avoid this error?

Thanks & Regards,

Suman.N

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Craig Russell

Architect, Sun Java Enterprise System http://java.sun.com/products/jdo

408 276-5638 mailto:Craig.Russell@sun.com

P.S. A good JDO? O, Gasp!

 



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