question about AbstractJdbc2Statement

[Luca Ferrari <fluca1978(at)infinito(dot)it>]

Hi all,
in the org.postgresql.jdbc2.AsbtractJdbc2Statement#executeQuery there's:

  if (result.getNext() != null)
            throw new PSQLException(GT.tr("Multiple ResultSets were returned 
by the query."), PSQLState.TOO_MANY_RESULTS);

It is not clear to me when an executeQuery could have multiple result sets as 
result, since the execution of the query thru the queryexecutor seems to me 
to exploit the SendOneQuery method. Is this related to the batch processing 
or something I'm missing from SQL? Can somebody explain me when multiple 
resultset can be returned from a query?

Thanks,
Luca