private void testCorrectnessOfErrorFunction(List<Number> inputList) throws Exception {
int inRange = 0;
int numberOfRuns = 1000;
double sampleRatio = 1 / (double) WEIGHT;
double actual = getExpectedValue(inputList);
Random rand = new Random(1);
for (int i = 0; i < numberOfRuns; i++) {
// Compute Sampled Value using sampledList (numberOfRuns times)
ImmutableList.Builder<Number> sampledList = ImmutableList.builder();
for (Number x : inputList) {
if (rand.nextDouble() < sampleRatio) {
sampledList.add(x);
}
}
BlockBuilder builder = getType().createBlockBuilder(new BlockBuilderStatus());
for (Number sample : sampledList.build()) {
if (getType() == BIGINT) {
BIGINT.writeLong(builder, sample.longValue());
} else if (getType() == DOUBLE) {
DOUBLE.writeDouble(builder, sample.doubleValue());
} else {
throw new AssertionError("Can only handle longs and doubles");
}
}
Page page = new Page(builder.build());
page = OperatorAssertion.appendSampleWeight(ImmutableList.of(page), WEIGHT).get(0);
Accumulator accumulator =
getFunction()
.bind(
ImmutableList.of(0),
Optional.<Integer>absent(),
Optional.of(page.getChannelCount() - 1),
getConfidence())
.createAccumulator();
accumulator.addInput(page);
Block result = accumulator.evaluateFinal();
String approxValue =
BlockAssertions.toValues(accumulator.getFinalType(), result).get(0).toString();
double approx = Double.parseDouble(approxValue.split(" ")[0]);
double error = Double.parseDouble(approxValue.split(" ")[2]);
// Check if actual answer lies within [approxAnswer - error, approxAnswer + error]
if (Math.abs(approx - actual) <= error) {
inRange++;
}
}
BinomialDistribution binomial = new BinomialDistribution(numberOfRuns, getConfidence());
int lowerBound = binomial.inverseCumulativeProbability(0.01);
int upperBound = binomial.inverseCumulativeProbability(0.99);
assertTrue(
lowerBound < inRange && inRange < upperBound,
String.format(
"%d out of %d passed. Expected [%d, %d]",
inRange, numberOfRuns, lowerBound, upperBound));
}
@Test(dataProvider = "hashEnabledValues")
public void testSingleChannel(boolean hashEnabled) throws Exception {
List<Type> joinTypes = ImmutableList.<Type>of(VARCHAR);
List<Integer> joinChannels = Ints.asList(0);
// compile a single channel hash strategy
PagesHashStrategyFactory pagesHashStrategyFactory =
joinCompiler.compilePagesHashStrategyFactory(joinTypes, joinChannels);
// create hash strategy with a single channel blocks -- make sure there is some overlap in
// values
List<Block> channel =
ImmutableList.of(
BlockAssertions.createStringSequenceBlock(10, 20),
BlockAssertions.createStringSequenceBlock(20, 30),
BlockAssertions.createStringSequenceBlock(15, 25));
Optional<Integer> hashChannel = Optional.empty();
List<List<Block>> channels = ImmutableList.of(channel);
if (hashEnabled) {
ImmutableList.Builder<Block> hashChannelBuilder = ImmutableList.builder();
for (Block block : channel) {
hashChannelBuilder.add(TypeUtils.getHashBlock(joinTypes, block));
}
hashChannel = Optional.of(1);
channels = ImmutableList.of(channel, hashChannelBuilder.build());
}
PagesHashStrategy hashStrategy =
pagesHashStrategyFactory.createPagesHashStrategy(channels, hashChannel);
// verify channel count
assertEquals(hashStrategy.getChannelCount(), 1);
// verify hashStrategy is consistent with equals and hash code from block
for (int leftBlockIndex = 0; leftBlockIndex < channel.size(); leftBlockIndex++) {
Block leftBlock = channel.get(leftBlockIndex);
PageBuilder pageBuilder = new PageBuilder(ImmutableList.of(VARCHAR));
for (int leftBlockPosition = 0;
leftBlockPosition < leftBlock.getPositionCount();
leftBlockPosition++) {
// hash code of position must match block hash
assertEquals(
hashStrategy.hashPosition(leftBlockIndex, leftBlockPosition),
hashPosition(VARCHAR, leftBlock, leftBlockPosition));
// position must be equal to itself
assertTrue(
hashStrategy.positionEqualsPositionIgnoreNulls(
leftBlockIndex, leftBlockPosition, leftBlockIndex, leftBlockPosition));
// check equality of every position against every other position in the block
for (int rightBlockIndex = 0; rightBlockIndex < channel.size(); rightBlockIndex++) {
Block rightBlock = channel.get(rightBlockIndex);
for (int rightBlockPosition = 0;
rightBlockPosition < rightBlock.getPositionCount();
rightBlockPosition++) {
boolean expected =
positionEqualsPosition(
VARCHAR, leftBlock, leftBlockPosition, rightBlock, rightBlockPosition);
assertEquals(
hashStrategy.positionEqualsRow(
leftBlockIndex, leftBlockPosition, rightBlockPosition, new Page(rightBlock)),
expected);
assertEquals(
hashStrategy.rowEqualsRow(
leftBlockPosition,
new Page(leftBlock),
rightBlockPosition,
new Page(rightBlock)),
expected);
assertEquals(
hashStrategy.positionEqualsRowIgnoreNulls(
leftBlockIndex, leftBlockPosition, rightBlockPosition, new Page(rightBlock)),
expected);
assertEquals(
hashStrategy.positionEqualsPositionIgnoreNulls(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition),
expected);
assertEquals(
hashStrategy.positionEqualsPosition(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition),
expected);
}
}
// check equality of every position against every other position in the block cursor
for (int rightBlockIndex = 0; rightBlockIndex < channel.size(); rightBlockIndex++) {
Block rightBlock = channel.get(rightBlockIndex);
for (int rightBlockPosition = 0;
rightBlockPosition < rightBlock.getPositionCount();
rightBlockPosition++) {
boolean expected =
positionEqualsPosition(
VARCHAR, leftBlock, leftBlockPosition, rightBlock, rightBlockPosition);
assertEquals(
hashStrategy.positionEqualsRow(
leftBlockIndex, leftBlockPosition, rightBlockPosition, new Page(rightBlock)),
expected);
assertEquals(
hashStrategy.rowEqualsRow(
leftBlockPosition,
new Page(leftBlock),
rightBlockPosition,
new Page(rightBlock)),
expected);
assertEquals(
hashStrategy.positionEqualsRowIgnoreNulls(
leftBlockIndex, leftBlockPosition, rightBlockPosition, new Page(rightBlock)),
expected);
assertEquals(
hashStrategy.positionEqualsPositionIgnoreNulls(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition),
expected);
assertEquals(
hashStrategy.positionEqualsPosition(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition),
expected);
}
}
// write position to output block
pageBuilder.declarePosition();
hashStrategy.appendTo(leftBlockIndex, leftBlockPosition, pageBuilder, 0);
}
// verify output block matches
assertBlockEquals(VARCHAR, pageBuilder.build().getBlock(0), leftBlock);
}
}
@Test(dataProvider = "hashEnabledValues")
public void testMultiChannel(boolean hashEnabled) throws Exception {
// compile a single channel hash strategy
JoinCompiler joinCompiler = new JoinCompiler();
List<Type> types = ImmutableList.<Type>of(VARCHAR, VARCHAR, BIGINT, DOUBLE, BOOLEAN);
List<Type> joinTypes = ImmutableList.<Type>of(VARCHAR, BIGINT, DOUBLE, BOOLEAN);
List<Integer> joinChannels = Ints.asList(1, 2, 3, 4);
// crate hash strategy with a single channel blocks -- make sure there is some overlap in values
List<Block> extraChannel =
ImmutableList.of(
BlockAssertions.createStringSequenceBlock(10, 20),
BlockAssertions.createStringSequenceBlock(20, 30),
BlockAssertions.createStringSequenceBlock(15, 25));
List<Block> varcharChannel =
ImmutableList.of(
BlockAssertions.createStringSequenceBlock(10, 20),
BlockAssertions.createStringSequenceBlock(20, 30),
BlockAssertions.createStringSequenceBlock(15, 25));
List<Block> longChannel =
ImmutableList.of(
BlockAssertions.createLongSequenceBlock(10, 20),
BlockAssertions.createLongSequenceBlock(20, 30),
BlockAssertions.createLongSequenceBlock(15, 25));
List<Block> doubleChannel =
ImmutableList.of(
BlockAssertions.createDoubleSequenceBlock(10, 20),
BlockAssertions.createDoubleSequenceBlock(20, 30),
BlockAssertions.createDoubleSequenceBlock(15, 25));
List<Block> booleanChannel =
ImmutableList.of(
BlockAssertions.createBooleanSequenceBlock(10, 20),
BlockAssertions.createBooleanSequenceBlock(20, 30),
BlockAssertions.createBooleanSequenceBlock(15, 25));
Optional<Integer> hashChannel = Optional.empty();
ImmutableList<List<Block>> channels =
ImmutableList.of(extraChannel, varcharChannel, longChannel, doubleChannel, booleanChannel);
List<Block> precomputedHash = ImmutableList.of();
if (hashEnabled) {
ImmutableList.Builder<Block> hashChannelBuilder = ImmutableList.builder();
for (int i = 0; i < 3; i++) {
hashChannelBuilder.add(
TypeUtils.getHashBlock(
joinTypes,
varcharChannel.get(i),
longChannel.get(i),
doubleChannel.get(i),
booleanChannel.get(i)));
}
hashChannel = Optional.of(5);
precomputedHash = hashChannelBuilder.build();
channels =
ImmutableList.of(
extraChannel,
varcharChannel,
longChannel,
doubleChannel,
booleanChannel,
precomputedHash);
types = ImmutableList.<Type>of(VARCHAR, VARCHAR, BIGINT, DOUBLE, BOOLEAN, BIGINT);
}
PagesHashStrategyFactory pagesHashStrategyFactory =
joinCompiler.compilePagesHashStrategyFactory(types, joinChannels);
PagesHashStrategy hashStrategy =
pagesHashStrategyFactory.createPagesHashStrategy(channels, hashChannel);
// todo add tests for filter function
PagesHashStrategy expectedHashStrategy =
new SimplePagesHashStrategy(types, channels, joinChannels, hashChannel);
// verify channel count
assertEquals(hashStrategy.getChannelCount(), types.size());
// verify size
long sizeInBytes =
channels.stream().flatMap(List::stream).mapToLong(Block::getRetainedSizeInBytes).sum();
assertEquals(hashStrategy.getSizeInBytes(), sizeInBytes);
// verify hashStrategy is consistent with equals and hash code from block
for (int leftBlockIndex = 0; leftBlockIndex < varcharChannel.size(); leftBlockIndex++) {
PageBuilder pageBuilder = new PageBuilder(types);
Block[] leftBlocks = new Block[4];
leftBlocks[0] = varcharChannel.get(leftBlockIndex);
leftBlocks[1] = longChannel.get(leftBlockIndex);
leftBlocks[2] = doubleChannel.get(leftBlockIndex);
leftBlocks[3] = booleanChannel.get(leftBlockIndex);
int leftPositionCount = varcharChannel.get(leftBlockIndex).getPositionCount();
for (int leftBlockPosition = 0; leftBlockPosition < leftPositionCount; leftBlockPosition++) {
// hash code of position must match block hash
assertEquals(
hashStrategy.hashPosition(leftBlockIndex, leftBlockPosition),
expectedHashStrategy.hashPosition(leftBlockIndex, leftBlockPosition));
// position must be equal to itself
assertTrue(
hashStrategy.positionEqualsPositionIgnoreNulls(
leftBlockIndex, leftBlockPosition, leftBlockIndex, leftBlockPosition));
assertTrue(
hashStrategy.positionEqualsPosition(
leftBlockIndex, leftBlockPosition, leftBlockIndex, leftBlockPosition));
// check equality of every position against every other position in the block
for (int rightBlockIndex = 0; rightBlockIndex < varcharChannel.size(); rightBlockIndex++) {
Block rightBlock = varcharChannel.get(rightBlockIndex);
for (int rightBlockPosition = 0;
rightBlockPosition < rightBlock.getPositionCount();
rightBlockPosition++) {
assertEquals(
hashStrategy.positionEqualsPositionIgnoreNulls(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition),
expectedHashStrategy.positionEqualsPositionIgnoreNulls(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition));
assertEquals(
hashStrategy.positionEqualsPosition(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition),
expectedHashStrategy.positionEqualsPosition(
leftBlockIndex, leftBlockPosition, rightBlockIndex, rightBlockPosition));
}
}
// check equality of every position against every other position in the block cursor
for (int rightBlockIndex = 0; rightBlockIndex < varcharChannel.size(); rightBlockIndex++) {
Block[] rightBlocks = new Block[4];
rightBlocks[0] = varcharChannel.get(rightBlockIndex);
rightBlocks[1] = longChannel.get(rightBlockIndex);
rightBlocks[2] = doubleChannel.get(rightBlockIndex);
rightBlocks[3] = booleanChannel.get(rightBlockIndex);
int rightPositionCount = varcharChannel.get(rightBlockIndex).getPositionCount();
for (int rightPosition = 0; rightPosition < rightPositionCount; rightPosition++) {
boolean expected =
expectedHashStrategy.positionEqualsRow(
leftBlockIndex, leftBlockPosition, rightPosition, new Page(rightBlocks));
assertEquals(
hashStrategy.positionEqualsRow(
leftBlockIndex, leftBlockPosition, rightPosition, new Page(rightBlocks)),
expected);
assertEquals(
hashStrategy.rowEqualsRow(
leftBlockPosition, new Page(leftBlocks), rightPosition, new Page(rightBlocks)),
expected);
assertEquals(
hashStrategy.positionEqualsRowIgnoreNulls(
leftBlockIndex, leftBlockPosition, rightPosition, new Page(rightBlocks)),
expected);
}
}
// write position to output block
pageBuilder.declarePosition();
hashStrategy.appendTo(leftBlockIndex, leftBlockPosition, pageBuilder, 0);
}
// verify output block matches
Page page = pageBuilder.build();
if (hashEnabled) {
assertPageEquals(
types,
page,
new Page(
extraChannel.get(leftBlockIndex),
varcharChannel.get(leftBlockIndex),
longChannel.get(leftBlockIndex),
doubleChannel.get(leftBlockIndex),
booleanChannel.get(leftBlockIndex),
precomputedHash.get(leftBlockIndex)));
} else {
assertPageEquals(
types,
page,
new Page(
extraChannel.get(leftBlockIndex),
varcharChannel.get(leftBlockIndex),
longChannel.get(leftBlockIndex),
doubleChannel.get(leftBlockIndex),
booleanChannel.get(leftBlockIndex)));
}
}
}