Examples of org.apache.hadoop.hive.serde2.columnar.BytesRefWritable

Package org.apache.hadoop.hive.serde2.columnar

Examples of org.apache.hadoop.hive.serde2.columnar.BytesRefWritable

org.apache.hadoop.hive.serde2.columnar.BytesRefWritable
BytesRefWritable referenced a section of byte array. It can be used to avoid unnecessary byte copy.

            // this partition may contain fewer fields than what's declared in the schema
            // this happens when additional columns are added to the hive table after a partition has been created
            nulls[column] = true;
        }
        else {
            BytesRefWritable fieldData = value.unCheckedGet(hiveColumnIndexes[column]);


            byte[] bytes;
            try {
                bytes = fieldData.getData();
            }
            catch (IOException e) {
                throw Throwables.propagate(e);
            }


            int start = fieldData.getStart();
            int length = fieldData.getLength();


            parseBooleanColumn(column, bytes, start, length);
        }
    }

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            // this partition may contain fewer fields than what's declared in the schema
            // this happens when additional columns are added to the hive table after a partition has been created
            nulls[column] = true;
        }
        else {
            BytesRefWritable fieldData = value.unCheckedGet(hiveColumnIndexes[column]);


            byte[] bytes;
            try {
                bytes = fieldData.getData();
            }
            catch (IOException e) {
                throw Throwables.propagate(e);
            }


            int start = fieldData.getStart();
            int length = fieldData.getLength();


            parseLongColumn(column, bytes, start, length);
        }
    }

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            // this partition may contain fewer fields than what's declared in the schema
            // this happens when additional columns are added to the hive table after a partition has been created
            nulls[column] = true;
        }
        else {
            BytesRefWritable fieldData = value.unCheckedGet(hiveColumnIndexes[column]);


            byte[] bytes;
            try {
                bytes = fieldData.getData();
            }
            catch (IOException e) {
                throw Throwables.propagate(e);
            }


            int start = fieldData.getStart();
            int length = fieldData.getLength();


            parseDoubleColumn(column, bytes, start, length);
        }
    }

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            // this partition may contain fewer fields than what's declared in the schema
            // this happens when additional columns are added to the hive table after a partition has been created
            nulls[column] = true;
        }
        else {
            BytesRefWritable fieldData = value.unCheckedGet(hiveColumnIndexes[column]);


            byte[] bytes;
            try {
                bytes = fieldData.getData();
            }
            catch (IOException e) {
                throw Throwables.propagate(e);
            }


            int start = fieldData.getStart();
            int length = fieldData.getLength();


            parseStringColumn(column, bytes, start, length);
        }
    }

View Full Code Here


      RCFile.Writer writer = new RCFile.Writer(fs, cloneConf, testFile, null, codec);


      BytesRefArrayWritable bytes = new BytesRefArrayWritable(bytesArray.length);
      for (int i = 0; i < bytesArray.length; i++) {
        BytesRefWritable cu = null;
        cu = new BytesRefWritable(bytesArray[i], 0, bytesArray[i].length);
        bytes.set(i, cu);
      }
      for (int i = 0; i < writeCount; i++) {
        writer.append(bytes);
      }

View Full Code Here

                fields = f;
            }




            for (int i = 0; i < fields.length; i++) {
                BytesRefWritable field = new BytesRefWritable(fields[i], 0,
                    fields[i].length);
                row.set(i, field);
                pw.print(new String(fields[i]));
                if (i!=fields.length-1)
                    pw.print("\t");

View Full Code Here

      }


      BytesRefArrayWritable columns = (BytesRefArrayWritable) val;
      int size = columns.size();
      for (int i = 0; i < size; i++) {
        BytesRefWritable cu = columns.get(i);
        int plainLen = cu.getLength();
        columnBufferSize += plainLen;
        columnValuePlainLength[i] += plainLen;
        columnBuffers[i].append(cu);
      }

View Full Code Here

      }
      for (int i = 0; i < recordsNumInValBuffer; i++) {
        colAdvanceRow(selColIdx, selCol);
        int length = selCol.prvLength;


        BytesRefWritable currentCell = rest.get(i);


        if (decompressed) {
          currentCell.set(uncompData, columnNextRowStart, length);
        } else {
          currentCell.set(decompCallBack, columnNextRowStart, length);
        }
        columnNextRowStart = columnNextRowStart + length;
      }
      return rest;
    }

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      if (currentValue.numCompressed > 0) {
        for (int j = 0; j < selectedColumns.length; ++j) {
          SelectedColumn col = selectedColumns[j];
          int i = col.colIndex;


          BytesRefWritable ref = ret.unCheckedGet(i);


          colAdvanceRow(j, col);


          if (currentValue.decompressedFlag[j]) {
            ref.set(currentValue.loadedColumnsValueBuffer[j].getData(),
                col.rowReadIndex, col.prvLength);
          } else {
            ref.set(currentValue.lazyDecompressCallbackObjs[j],
                col.rowReadIndex, col.prvLength);
          }
          col.rowReadIndex += col.prvLength;
        }
      } else {
        // This version of the loop eliminates a condition check and branch
        // and is measurably faster (20% or so)
        for (int j = 0; j < selectedColumns.length; ++j) {
          SelectedColumn col = selectedColumns[j];
          int i = col.colIndex;


          BytesRefWritable ref = ret.unCheckedGet(i);


          colAdvanceRow(j, col);
          ref.set(currentValue.loadedColumnsValueBuffer[j].getData(),
                col.rowReadIndex, col.prvLength);
          col.rowReadIndex += col.prvLength;
        }
      }
      rowFetched = true;

View Full Code Here

    RCFileOutputFormat.setColumnNumber(conf, expectedFieldsData.length);
    RCFile.Writer writer = new RCFile.Writer(fs, conf, file, null,
        new DefaultCodec());
    BytesRefArrayWritable bytes = new BytesRefArrayWritable(record_1.length);
    for (int i = 0; i < record_1.length; i++) {
      BytesRefWritable cu = new BytesRefWritable(record_1[i], 0,
          record_1[i].length);
      bytes.set(i, cu);
    }
    writer.append(bytes);
    bytes.clear();
    for (int i = 0; i < record_2.length; i++) {
      BytesRefWritable cu = new BytesRefWritable(record_2[i], 0,
          record_2[i].length);
      bytes.set(i, cu);
    }
    writer.append(bytes);
    writer.close();

View Full Code Here

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