Re: DatabaseMetaData.getImportedKeys returning duplicate rows

From: Peter Royal <proyal(at)pace2020(dot)com>
To: pgsql-jdbc(at)postgresql(dot)org
Subject: Re: DatabaseMetaData.getImportedKeys returning duplicate rows
Date: 2003-03-17 02:39:48
Message-ID: B8825046-5821-11D7-89AD-000393B61B56@pace2020.com
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Anyone? Is a specific testcase needed? Is no-one else using this
metadata?
thanks.
-pete

On Monday, March 3, 2003, at 09:27 PM, Peter Royal wrote:

> I am having a problem with the DatabaseMetaData.getImportedKeys()
> function. I am asking for the keys with respect to a specific table.
> All is fine, except when I have two columns in a table that are both
> foreign keys to another table, ie:
>
> Table A Table B
> ------- -------
> col1 -----------pk
> col2 -----------/
>
> The ResultSet returned from getImportedKeys is structured:
>
> col1
> col2
> col1
> col2
>
> If I execute the query that is generated behind the scenes in the psql
> command-line program, adding the DISTINCT keyword to the query causes
> it to return the proper number of rows. Is that a valid fix, or will
> that break something else? Should the duplicate-reduction be done
> inside the java code that creates the ResultSet? I have no problem
> making the fix, I just don't know enough about the jdbc internals (nor
> postgres itself, I'm a new user) to be confident enough to know
> exactly *what* to fix.
>
> Anyways great work thus far, I look forward to helping improve the
> driver!
> -pete
>
> --
> peter royal -> proyal(at)pace2020(dot)com
>
>
> ---------------------------(end of
> broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

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