use of com.yahoo.sketches.tuple.UpdatableSketch in project sketches-pig by DataSketches.
the class DataToSketchAlgebraicIntermediateFinal method exec.
@Override
public Tuple exec(final Tuple inputTuple) throws IOException {
if (isFirstCall_) {
// this is to see in the log which way was used by Pig
Logger.getLogger(getClass()).info("algebraic is used");
isFirstCall_ = false;
}
final Union<S> union = new Union<S>(sketchSize_, summarySetOps_);
final DataBag bag = (DataBag) inputTuple.get(0);
if (bag == null) {
throw new IllegalArgumentException("InputTuple.Field0: Bag may not be null");
}
for (final Tuple dataTuple : bag) {
final Object item = dataTuple.get(0);
if (item instanceof DataBag) {
// this is a bag from the Initial function.
// just insert each item of the tuple into the sketch
final UpdatableSketch<U, S> sketch = sketchBuilder_.build();
DataToSketch.updateSketch((DataBag) item, sketch);
union.update(sketch);
} else if (item instanceof DataByteArray) {
// This is a sketch from a prior call to the
// Intermediate function. merge it with the
// current sketch.
final Sketch<S> incomingSketch = Util.deserializeSketchFromTuple(dataTuple, summaryDeserializer_);
union.update(incomingSketch);
} else {
// we should never get here.
throw new IllegalArgumentException("InputTuple.Field0: Bag contains unrecognized types: " + item.getClass().getName());
}
}
return Util.tupleFactory.newTuple(new DataByteArray(union.getResult().toByteArray()));
}
use of com.yahoo.sketches.tuple.UpdatableSketch in project sketches-pig by DataSketches.
the class UnionDoubleSummarySketchTest method algebraicIntemediateFinalEstimation.
@Test
public void algebraicIntemediateFinalEstimation() throws Exception {
EvalFunc<Tuple> func = new UnionDoubleSummarySketch.IntermediateFinal("16384");
DataBag bag = BagFactory.getInstance().newDefaultBag();
long value = 1;
// this is to simulate the output from Initial
{
UpdatableSketch<Double, DoubleSummary> sketch = new UpdatableSketchBuilder<Double, DoubleSummary>(new DoubleSummaryFactory()).setNominalEntries(16384).build();
for (int i = 0; i < 20000; i++) sketch.update(value++, 1.0);
DataBag innerBag = PigUtil.tuplesToBag(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
bag.add(PigUtil.objectsToTuple(innerBag));
}
// this is to simulate the output from a prior call of IntermediateFinal
{
UpdatableSketch<Double, DoubleSummary> sketch = new UpdatableSketchBuilder<Double, DoubleSummary>(new DoubleSummaryFactory()).setNominalEntries(16384).build();
for (int i = 0; i < 20000; i++) sketch.update(value++, 1.0);
bag.add(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
}
Tuple resultTuple = func.exec(PigUtil.objectsToTuple(bag));
Assert.assertNotNull(resultTuple);
Assert.assertEquals(resultTuple.size(), 1);
DataByteArray bytes = (DataByteArray) resultTuple.get(0);
Assert.assertTrue(bytes.size() > 0);
Sketch<DoubleSummary> sketch = Sketches.heapifySketch(Memory.wrap(bytes.get()), new DoubleSummaryDeserializer());
Assert.assertEquals(sketch.getEstimate(), 40000.0, 40000.0 * 0.01);
SketchIterator<DoubleSummary> it = sketch.iterator();
while (it.next()) {
Assert.assertEquals(it.getSummary().getValue(), 1.0, 0.0);
}
}
use of com.yahoo.sketches.tuple.UpdatableSketch in project sketches-pig by DataSketches.
the class UnionDoubleSummarySketchTest method algebraicIntemediateFinalSingleCall.
@Test
public void algebraicIntemediateFinalSingleCall() throws Exception {
EvalFunc<Tuple> func = new UnionDoubleSummarySketch.IntermediateFinal("1024");
DataBag bag = BagFactory.getInstance().newDefaultBag();
long value = 1;
// this is to simulate the output from a prior call of IntermediateFinal
{
UpdatableSketch<Double, DoubleSummary> sketch = new UpdatableSketchBuilder<Double, DoubleSummary>(new DoubleSummaryFactory()).setNominalEntries(1024).build();
for (int i = 0; i < 10000; i++) sketch.update(value++, 1.0);
bag.add(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
}
Tuple resultTuple = func.exec(PigUtil.objectsToTuple(bag));
Assert.assertNotNull(resultTuple);
Assert.assertEquals(resultTuple.size(), 1);
DataByteArray bytes = (DataByteArray) resultTuple.get(0);
Assert.assertTrue(bytes.size() > 0);
Sketch<DoubleSummary> sketch = Sketches.heapifySketch(Memory.wrap(bytes.get()), new DoubleSummaryDeserializer());
Assert.assertEquals(sketch.getEstimate(), 10000.0, 10000.0 * 0.02);
SketchIterator<DoubleSummary> it = sketch.iterator();
while (it.next()) {
Assert.assertEquals(it.getSummary().getValue(), 1.0, 0.0);
}
}
use of com.yahoo.sketches.tuple.UpdatableSketch in project sketches-pig by DataSketches.
the class UnionDoubleSummarySketchTest method accumulator.
@Test
public void accumulator() throws Exception {
Accumulator<Tuple> func = new UnionDoubleSummarySketch("4096");
DataBag bag = BagFactory.getInstance().newDefaultBag();
{
UpdatableSketch<Double, DoubleSummary> sketch = new UpdatableSketchBuilder<Double, DoubleSummary>(new DoubleSummaryFactory()).build();
sketch.update(1, 1.0);
sketch.update(2, 1.0);
bag.add(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
}
func.accumulate(PigUtil.objectsToTuple(bag));
bag = BagFactory.getInstance().newDefaultBag();
{
UpdatableSketch<Double, DoubleSummary> sketch = new UpdatableSketchBuilder<Double, DoubleSummary>(new DoubleSummaryFactory()).build();
sketch.update(1, 1.0);
sketch.update(2, 1.0);
bag.add(PigUtil.objectsToTuple(new DataByteArray(sketch.compact().toByteArray())));
}
func.accumulate(PigUtil.objectsToTuple(bag));
Tuple resultTuple = func.getValue();
Assert.assertNotNull(resultTuple);
Assert.assertEquals(resultTuple.size(), 1);
DataByteArray bytes = (DataByteArray) resultTuple.get(0);
Assert.assertTrue(bytes.size() > 0);
Sketch<DoubleSummary> sketch = Sketches.heapifySketch(Memory.wrap(bytes.get()), new DoubleSummaryDeserializer());
Assert.assertEquals(sketch.getEstimate(), 2.0, 0.0);
SketchIterator<DoubleSummary> it = sketch.iterator();
while (it.next()) {
Assert.assertEquals(it.getSummary().getValue(), 2.0, 0.0);
}
}
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