Re: Foreign Keys and getImportedKeys(..)

You can get this functionality out of the new driver. It can be found at
http://jdbc.postgresql.org

Dave

-----Original Message-----
From: pgsql-jdbc-owner(at)postgresql(dot)org
[mailto:pgsql-jdbc-owner(at)postgresql(dot)org] On Behalf Of Ashvin Lad
Sent: Thursday, January 31, 2002 1:29 PM
To: pgsql-jdbc(at)postgresql(dot)org
Subject: [JDBC] Foreign Keys and getImportedKeys(..)

Hi All,

After getting a metadata object from a PostgreSQL connection, I can use
the getPrimaryKeys() method
to display a table's primary keys but I can't use the getImportedKeys()
method to get its foreign keys. Can anyone help?

This works:

ResultSet pksRS = dbmd.getPrimaryKeys(null, null, tableName);
while(pksRS.next())
{
... pksRS.getString("COLUMN_NAME");
}

But this does not:

ResultSet fksRS = dbmd.getImportedKeys(null, null, tableName);
while(fksRS.next())
{
... fksRS.getString("FKCOLUMN_NAME");
}

I get a NullPointerException because fksRS is null, but I don't know
why. This is not the case when I use MS SQL Server...it does work. Is
this because the JDBC driver provided with PostgreSQL doesn't support
this function?

Thanks,

Ash.

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