Package org.apache.tajo.storage.CSVFile

Examples of org.apache.tajo.storage.CSVFile.CSVScanner

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    BSTIndexWriter creater = bst.getIndexWriter(new Path(testDir,
        "FindValueInCSV.idx"), BSTIndex.TWO_LEVEL_INDEX, keySchema, comp);
    creater.setLoadNum(LOAD_NUM);
    creater.open();

    SeekableScanner fileScanner = new CSVScanner(conf, meta, tablet);
    fileScanner.init();
    Tuple keyTuple;
    long offset;
    while (true) {
      keyTuple = new VTuple(2);
      offset = fileScanner.getNextOffset();
      tuple = fileScanner.next();
      if (tuple == null)
        break;

      keyTuple.put(0, tuple.get(1));
      keyTuple.put(1, tuple.get(2));
      creater.write(keyTuple, offset);
    }

    creater.flush();
    creater.close();
    fileScanner.close();

    tuple = new VTuple(keySchema.getColumnNum());
    BSTIndexReader reader = bst.getIndexReader(new Path(testDir,
        "FindValueInCSV.idx"), keySchema, comp);
    reader.open();
    fileScanner = new CSVScanner(conf, meta, tablet);
    fileScanner.init();
    for (int i = 0; i < TUPLE_NUM - 1; i++) {
      tuple.put(0, DatumFactory.createInt8(i));
      tuple.put(1, DatumFactory.createFloat8(i));
      long offsets = reader.find(tuple);
      fileScanner.seek(offsets);
      tuple = fileScanner.next();
      assertEquals(i,  (tuple.get(1).asInt8()));
      assertEquals(i, (tuple.get(2).asFloat8()) , 0.01);

      offsets = reader.next();
      if (offsets == -1) {
        continue;
      }
      fileScanner.seek(offsets);
      tuple = fileScanner.next();
      assertTrue("[seek check " + (i + 1) + " ]",
          (i + 1) == (tuple.get(0).asInt4()));
      assertTrue("[seek check " + (i + 1) + " ]",
          (i + 1) == (tuple.get(1).asInt8()));
    }
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    BSTIndexWriter creater = bst.getIndexWriter(new Path(testDir, "FindNextKeyValueInCSV.idx"),
        BSTIndex.TWO_LEVEL_INDEX, keySchema, comp);
    creater.setLoadNum(LOAD_NUM);
    creater.open();
   
    SeekableScanner fileScanner  = new CSVScanner(conf, meta, tablet);
    fileScanner.init();
    Tuple keyTuple;
    long offset;
    while (true) {
      keyTuple = new VTuple(2);
      offset = fileScanner.getNextOffset();
      tuple = fileScanner.next();
      if (tuple == null) break;
     
      keyTuple.put(0, tuple.get(0));
      keyTuple.put(1, tuple.get(1));
      creater.write(keyTuple, offset);
    }
   
    creater.flush();
    creater.close();
    fileScanner.close();   
   
    BSTIndexReader reader = bst.getIndexReader(new Path(testDir, "FindNextKeyValueInCSV.idx"), keySchema, comp);
    reader.open();
    fileScanner  = new CSVScanner(conf, meta, tablet);
    fileScanner.init();
    Tuple result;
    for(int i = 0 ; i < TUPLE_NUM -1 ; i ++) {
      keyTuple = new VTuple(2);
      keyTuple.put(0, DatumFactory.createInt4(i));
      keyTuple.put(1, DatumFactory.createInt8(i));
      long offsets = reader.find(keyTuple, true);
      fileScanner.seek(offsets);
      result = fileScanner.next();
      assertTrue("[seek check " + (i + 1) + " ]" , (i + 1) == (result.get(0).asInt4()));
      assertTrue("[seek check " + (i + 1) + " ]" , (i + 1) == (result.get(1).asInt8()));
     
      offsets = reader.next();
      if (offsets == -1) {
        continue;
      }
      fileScanner.seek(offsets);
      result = fileScanner.next();
      assertTrue("[seek check " + (i + 2) + " ]" , (i + 2) == (result.get(0).asInt8()));
      assertTrue("[seek check " + (i + 2) + " ]" , (i + 2) == (result.get(1).asFloat8()));
    }
  }
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    BSTIndexWriter creater = bst.getIndexWriter(new Path(testDir,
        "FindValueInCSV.idx"), BSTIndex.TWO_LEVEL_INDEX, keySchema, comp);
    creater.setLoadNum(LOAD_NUM);
    creater.open();

    SeekableScanner fileScanner = new CSVScanner(conf, schema, meta, tablet);
    fileScanner.init();
    Tuple keyTuple;
    long offset;
    while (true) {
      keyTuple = new VTuple(2);
      offset = fileScanner.getNextOffset();
      tuple = fileScanner.next();
      if (tuple == null)
        break;

      keyTuple.put(0, tuple.get(1));
      keyTuple.put(1, tuple.get(2));
      creater.write(keyTuple, offset);
    }

    creater.flush();
    creater.close();
    fileScanner.close();

    tuple = new VTuple(keySchema.size());
    BSTIndexReader reader = bst.getIndexReader(new Path(testDir,
        "FindValueInCSV.idx"), keySchema, comp);
    reader.open();
    fileScanner = new CSVScanner(conf, schema, meta, tablet);
    fileScanner.init();
    for (int i = 0; i < TUPLE_NUM - 1; i++) {
      tuple.put(0, DatumFactory.createInt8(i));
      tuple.put(1, DatumFactory.createFloat8(i));
      long offsets = reader.find(tuple);
      fileScanner.seek(offsets);
      tuple = fileScanner.next();
      assertEquals(i,  (tuple.get(1).asInt8()));
      assertEquals(i, (tuple.get(2).asFloat8()) , 0.01);

      offsets = reader.next();
      if (offsets == -1) {
        continue;
      }
      fileScanner.seek(offsets);
      tuple = fileScanner.next();
      assertTrue("[seek check " + (i + 1) + " ]",
          (i + 1) == (tuple.get(0).asInt4()));
      assertTrue("[seek check " + (i + 1) + " ]",
          (i + 1) == (tuple.get(1).asInt8()));
    }
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    BSTIndexWriter creater = bst.getIndexWriter(new Path(testDir, "FindNextKeyValueInCSV.idx"),
        BSTIndex.TWO_LEVEL_INDEX, keySchema, comp);
    creater.setLoadNum(LOAD_NUM);
    creater.open();
   
    SeekableScanner fileScanner  = new CSVScanner(conf, schema, meta, tablet);
    fileScanner.init();
    Tuple keyTuple;
    long offset;
    while (true) {
      keyTuple = new VTuple(2);
      offset = fileScanner.getNextOffset();
      tuple = fileScanner.next();
      if (tuple == null) break;
     
      keyTuple.put(0, tuple.get(0));
      keyTuple.put(1, tuple.get(1));
      creater.write(keyTuple, offset);
    }
   
    creater.flush();
    creater.close();
    fileScanner.close();   
   
    BSTIndexReader reader = bst.getIndexReader(new Path(testDir, "FindNextKeyValueInCSV.idx"), keySchema, comp);
    reader.open();
    fileScanner  = new CSVScanner(conf, schema, meta, tablet);
    fileScanner.init();
    Tuple result;
    for(int i = 0 ; i < TUPLE_NUM -1 ; i ++) {
      keyTuple = new VTuple(2);
      keyTuple.put(0, DatumFactory.createInt4(i));
      keyTuple.put(1, DatumFactory.createInt8(i));
      long offsets = reader.find(keyTuple, true);
      fileScanner.seek(offsets);
      result = fileScanner.next();
      assertTrue("[seek check " + (i + 1) + " ]" , (i + 1) == (result.get(0).asInt4()));
      assertTrue("[seek check " + (i + 1) + " ]" , (i + 1) == (result.get(1).asInt8()));
     
      offsets = reader.next();
      if (offsets == -1) {
        continue;
      }
      fileScanner.seek(offsets);
      result = fileScanner.next();
      assertTrue("[seek check " + (i + 2) + " ]" , (i + 2) == (result.get(0).asInt8()));
      assertTrue("[seek check " + (i + 2) + " ]" , (i + 2) == (result.get(1).asFloat8()));
    }
  }
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Related Classes of org.apache.tajo.storage.CSVFile.CSVScanner

  • org.apache.tajo.storage.index.TestSingleCSVFileBSTIndex
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