Examples with HllSketch com.yahoo.sketches.hll.HllSketch used on opensource projects

Example 11 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method algebraicFinalFromInitial.

@Test
public void algebraicFinalFromInitial() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<DataByteArray> func = (EvalFunc<DataByteArray>) Class.forName(new UnionSketch().getFinal()).getConstructor(String.class, String.class).newInstance("10", "HLL_6");
    HllSketch inputSketch = new HllSketch(12);
    inputSketch.update(1);
    inputSketch.update(2);
    inputSketch.update(3);
    DataBag outerBag = bagFactory.newDefaultBag();
    DataBag innerBag = bagFactory.newDefaultBag();
    innerBag.add(tupleFactory.newTuple(new DataByteArray(inputSketch.toCompactByteArray())));
    outerBag.add(tupleFactory.newTuple(innerBag));
    DataByteArray result = func.exec(tupleFactory.newTuple(outerBag));
    HllSketch sketch = DataToSketchTest.getSketch(result);
    Assert.assertFalse(sketch.isEmpty());
    Assert.assertEquals(sketch.getEstimate(), 3.0, 0.01);
    Assert.assertEquals(sketch.getLgConfigK(), 10);
    Assert.assertEquals(sketch.getTgtHllType(), TgtHllType.HLL_6);
}

Example 12 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method algebraicIntermediateFromInitial.

@Test
public void algebraicIntermediateFromInitial() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new UnionSketch().getIntermed()).getConstructor(String.class, String.class).newInstance("10", "HLL_6");
    HllSketch inputSketch = new HllSketch(12);
    inputSketch.update(1);
    inputSketch.update(2);
    inputSketch.update(3);
    DataBag outerBag = bagFactory.newDefaultBag();
    DataBag innerBag = bagFactory.newDefaultBag();
    innerBag.add(tupleFactory.newTuple(new DataByteArray(inputSketch.toCompactByteArray())));
    outerBag.add(tupleFactory.newTuple(innerBag));
    Tuple result = func.exec(tupleFactory.newTuple(outerBag));
    HllSketch sketch = DataToSketchTest.getSketch((DataByteArray) result.get(0));
    Assert.assertFalse(sketch.isEmpty());
    Assert.assertEquals(sketch.getEstimate(), 3.0, 0.01);
    Assert.assertEquals(sketch.getLgConfigK(), 10);
    Assert.assertEquals(sketch.getTgtHllType(), TgtHllType.HLL_6);
}

Example 13 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method algebraicFinalNullInputTuple.

@Test
public void algebraicFinalNullInputTuple() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<DataByteArray> func = (EvalFunc<DataByteArray>) Class.forName(new UnionSketch().getFinal()).newInstance();
    DataByteArray result = func.exec(null);
    HllSketch sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
}

Example 14 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method algebraicIntermediateNullInputTuple.

@Test
public void algebraicIntermediateNullInputTuple() throws Exception {
    @SuppressWarnings("unchecked") EvalFunc<Tuple> func = (EvalFunc<Tuple>) Class.forName(new UnionSketch().getIntermed()).newInstance();
    Tuple result = func.exec(null);
    HllSketch sketch = DataToSketchTest.getSketch((DataByteArray) result.get(0));
    Assert.assertTrue(sketch.isEmpty());
}

Example 15 with HllSketch

use of com.yahoo.sketches.hll.HllSketch in project sketches-pig by DataSketches.

the class UnionSketchTest method execEmptyBag.

@Test
public void execEmptyBag() throws Exception {
    EvalFunc<DataByteArray> func = new UnionSketch("10", "HLL_6");
    DataByteArray result = func.exec(tupleFactory.newTuple(bagFactory.newDefaultBag()));
    HllSketch sketch = DataToSketchTest.getSketch(result);
    Assert.assertTrue(sketch.isEmpty());
    Assert.assertEquals(sketch.getLgConfigK(), 10);
    Assert.assertEquals(sketch.getTgtHllType(), TgtHllType.HLL_6);
}