presto-accumulo/src/main/java/io/prestosql/plugin/accumulo/io/AccumuloRecordCursor.java/AccumuloRecordCursor/getType
class AccumuloRecordCursor:    @Override
    public Type getType(int field)
    {
        checkArgument(field >= 0 && field < columnHandles.size(), "Invalid field index");
        return columnHandles.get(field).getType();
    }