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jdbc and refcursor problem

From: "Gaetano Sferra" <gaesferr(at)libero(dot)it>
To: "pgsql-interfaces" <pgsql-interfaces(at)postgresql(dot)org>
Subject: jdbc and refcursor problem
Date: 2004-12-03 14:20:15
Message-ID: I85H5R$B4CD2326C7906242A84B9060C3AF1DBB@libero.it (view raw or flat)
Thread:
Lists: pgsql-interfaces
Hello to all,
I need to process a cursor returned by a stored function,
reading the jdbc driver docs I learned how to do it but I got a strange behavior
using metadata.
For xample:

CallableStatement cstm = conn.prepareCall("{ ? = call myfunction() }");
cstm.registerOutParameter(1, Types.OTHER);
cstm.execute();

ResultSet rs = (ResultSet) cstm.getObject(1);
ResutlSetMetaData rsmd = rs.getMetaData();
int columns  = rsmd.getColumnCount() // <-- this throw a NullPointerException

I got a NullPointerException when try to retrieve the ResultSet column count
even if the ResultSet contains or not data. Is there a workaround?

Thanks,
Gaetano Sferra



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