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rs = st.executeQuery(sql);
if (rs!=null) {
rs.last();
int rows = rs.getRow();
if (rows == 0) return null;
rs.beforeFirst();
array = new java.util.ArrayList[rows];
int l = 0;
while (rs.next()) {
array[l] = new ArrayList();
array[l].add(0,rs.getString(1));
array[l].add(1,new Double(rs.getDouble(2)));
array[l].add(2,new Double(rs.getDouble(3)));
array[l].add(3,rs.getString(4));
l++;
}
}