private static LlapSerDeDataBuffer[][] createArrayToCache(
      StripeData sliceToCache, int colIx, List<CacheWriter.CacheStreamData> streams) {
    if (LlapIoImpl.LOG.isTraceEnabled()) {
      LlapIoImpl.LOG.trace("Processing streams for column " + colIx + ": " + streams);
    }
    LlapSerDeDataBuffer[][] newCacheDataForCol = sliceToCache.getData()[colIx]
        = new LlapSerDeDataBuffer[OrcEncodedColumnBatch.MAX_DATA_STREAMS][];
    return newCacheDataForCol;
  }
Unlike the other overload of processOneSlice, doesn't cache data.
llap-server/src/java/org/apache/hadoop/hive/llap/io/encoded/SerDeEncodedDataReader.java