@Override
    public byte getProbeMjSmallTablePos() {
      return this.probeDecodeContext.getMjSmallTablePos();
    }
LLAP IO always returns the column vectors in the order as they are seen in the file.
To support logical column reordering, we need to do a matching between file and read schemas.
(this only supports one level of schema reordering, not within complex types, also not supported for ORC ACID)
llap-server/src/java/org/apache/hadoop/hive/llap/io/api/impl/LlapRecordReader.java