PreparedStatement st = connection.prepareStatement("delete from temp_t where col1 = ?");
st.setInt(1, 0);
st.addBatch();
st.setInt(1, 1);
st.addBatch();
int[] ints = st.executeBatch();

When I run Batched Queries in 1.6.4 or 2.0.3 I got two results, exactly what I expect;
ints =

When the same code ran in 2.1.0 or 2.1.1
I got unexpected first value -3, so that my array looks like this:
ints = {-3, 1, 1}

In case if newer driver used with Hibernate, we face fail, since it traverse through whole array and throw Exception on negative values - it's in this class

org.hibernate.engine.jdbc.batch.internal.BatchingBatch.checkRowCounts()