Examples of org.apache.hadoop.hive.ql.exec.vector.DoubleColumnVector

Package org.apache.hadoop.hive.ql.exec.vector

Examples of org.apache.hadoop.hive.ql.exec.vector.DoubleColumnVector

org.apache.hadoop.hive.ql.exec.vector.DoubleColumnVector
This class represents a nullable double precision floating point column vector. This class will be used for operations on all floating point types (float, double) and as such will use a 64-bit double value to hold the biggest possible value. During copy-in/copy-out, smaller types (i.e. float) will be converted as needed. This will reduce the amount of code that needs to be generated and also will run fast since the machine operates with 64-bit words. The vector[] field is public by design for high-performance access in the inner loop of query execution.


    // test basic case
    VectorizedRowBatch b = getBatchDecimalDouble();
    VectorExpression expr = new CastDecimalToDouble(0, 1);
    expr.evaluate(b);
    DoubleColumnVector r = (DoubleColumnVector) b.cols[1];
    assertEquals(1.1d, r.vector[0], eps);
    assertEquals(-2.2d, r.vector[1], eps);
    assertEquals(9999999999999999.0d, r.vector[2], eps);


    // test with nulls in input

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  private VectorizedRowBatch getBatchDecimalDouble() {
    VectorizedRowBatch b = new VectorizedRowBatch(2);
    DecimalColumnVector dv;
    short scale = 2;
    b.cols[0] = dv = new DecimalColumnVector(18, scale);
    b.cols[1] = new DoubleColumnVector();


    b.size = 3;


    dv.vector[0].update("1.1", scale);
    dv.vector[1].update("-2.2", scale);

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    assertTrue(r.vector[2].equals(new Decimal128("99999999999999.0", r.scale)));
  }


  private VectorizedRowBatch getBatchDoubleDecimal() {
    VectorizedRowBatch b = new VectorizedRowBatch(2);
    DoubleColumnVector dv;
    short scale = 2;
    b.cols[0] = dv = new DoubleColumnVector();
    b.cols[1] = new DecimalColumnVector(18, scale);


    b.size = 3;


    dv.vector[0] = 0d;

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  @Test
  public void testVectorRound() {
    VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
    VectorExpression expr = new FuncRoundDoubleToDouble(0, 1);
    DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];
    b.cols[0].noNulls = true;
    expr.evaluate(b);
    Assert.assertEquals(-2d, resultV.vector[0]);
    Assert.assertEquals(-1d, resultV.vector[1]);
    Assert.assertEquals(0d, resultV.vector[2]);

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  public void testRoundToDecimalPlaces() {
    VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
    VectorExpression expr = new RoundWithNumDigitsDoubleToDouble(0, 4, 1);
    ((ISetLongArg) expr).setArg(4);  // set number of digits
    expr.evaluate(b);
    DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];


    // Verify result is rounded to 4 digits
    Assert.assertEquals(1.2346d, resultV.vector[7]);
  }

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  }


  public static VectorizedRowBatch getVectorizedRowBatchDoubleInLongOut() {
    VectorizedRowBatch batch = new VectorizedRowBatch(2);
    LongColumnVector lcv;
    DoubleColumnVector dcv;
    lcv = new LongColumnVector();
    dcv = new DoubleColumnVector();
    dcv.vector[0] = -1.5d;
    dcv.vector[1] = -0.5d;
    dcv.vector[2] = -0.1d;
    dcv.vector[3] = 0d;
    dcv.vector[4] = 0.5d;

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    return batch;
  }


  public static VectorizedRowBatch getVectorizedRowBatchDoubleInDoubleOut() {
    VectorizedRowBatch batch = new VectorizedRowBatch(2);
    DoubleColumnVector inV;
    DoubleColumnVector outV;
    outV = new DoubleColumnVector();
    inV = new DoubleColumnVector();
    inV.vector[0] = -1.5d;
    inV.vector[1] = -0.5d;
    inV.vector[2] = -0.1d;
    inV.vector[3] = 0d;
    inV.vector[4] = 0.5d;

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  }


  public static VectorizedRowBatch getVectorizedRowBatchLongInDoubleOut() {
    VectorizedRowBatch batch = new VectorizedRowBatch(2);
    LongColumnVector lcv;
    DoubleColumnVector dcv;
    lcv = new LongColumnVector();
    dcv = new DoubleColumnVector();
    lcv.vector[0] = -2;
    lcv.vector[1] = -1;
    lcv.vector[2] = 0;
    lcv.vector[3] = 1;
    lcv.vector[4] = 2;

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   * (for FuncRoundDoubleToDouble).
   */
  @Test
  public void testVectorSin() {
    VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
    DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];
    b.cols[0].noNulls = true;
    VectorExpression expr = new FuncSinDoubleToDouble(0, 1);
    expr.evaluate(b);
    Assert.assertEquals(Math.sin(0.5d), resultV.vector[4]);
  }

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  }


  @Test
  public void testVectorCos() {
    VectorizedRowBatch b = getVectorizedRowBatchDoubleInDoubleOut();
    DoubleColumnVector resultV = (DoubleColumnVector) b.cols[1];
    b.cols[0].noNulls = true;
    VectorExpression expr = new FuncCosDoubleToDouble(0, 1);
    expr.evaluate(b);
    Assert.assertEquals(Math.cos(0.5d), resultV.vector[4]);
  }

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