Problem with ResultSet retrieved with SELECT * FROM pg_indexes WHERE tablename

hi list,

i hope anybody can help me with this thing:

i tried to select all indexes of a table with the following statement via jdbc:

Statement pgstatement;
Connection pgconnection;
...
pgstatement = pgconnection.createStatement();

query= "SELECT * FROM pg_indexes WHERE tablename ='g_g114'";
pgresultSet=pgstatement.executeQuery(query);

after that i want to step through the ResultSet with
while(pgresultSet.next())
{...}

but i get an exception from pgresultSet.next() which says:

org.postgresql.util.PSQLException: DataSource has been closed

what can be the mistake?

i appreciate any help,

thanks, stefan
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