Examples with DriverYieldSignal io.prestosql.operator.DriverYieldSignal used on opensource projects

Example 16 with DriverYieldSignal

use of io.prestosql.operator.DriverYieldSignal in project hetu-core by openlookeng.

the class TestPageProcessor method testYieldProjection.

@Test
public void testYieldProjection() {
    // each projection can finish without yield
    // while between two projections, there is a yield
    int rows = 128;
    int columns = 20;
    DriverYieldSignal yieldSignal = new DriverYieldSignal();
    PageProcessor pageProcessor = new PageProcessor(Optional.empty(), Collections.nCopies(columns, new YieldPageProjection(new InputPageProjection(0, VARCHAR))), OptionalInt.of(MAX_BATCH_SIZE));
    Slice[] slices = new Slice[rows];
    Arrays.fill(slices, Slices.allocate(rows));
    Page inputPage = new Page(createSlicesBlock(slices));
    Iterator<Optional<Page>> output = processAndAssertRetainedPageSize(pageProcessor, yieldSignal, inputPage);
    // Also, we would like to reset the yield signal before starting to process the next column in order NOT to yield per position inside the column.
    for (int i = 0; i < columns - 1; i++) {
        assertTrue(output.hasNext());
        assertNull(output.next().orElse(null));
        assertTrue(yieldSignal.isSet());
        yieldSignal.reset();
    }
    assertTrue(output.hasNext());
    Page actualPage = output.next().orElse(null);
    assertNotNull(actualPage);
    assertTrue(yieldSignal.isSet());
    yieldSignal.reset();
    Block[] blocks = new Block[columns];
    Arrays.fill(blocks, createSlicesBlock(Arrays.copyOfRange(slices, 0, rows)));
    Page expectedPage = new Page(blocks);
    assertPageEquals(Collections.nCopies(columns, VARCHAR), actualPage, expectedPage);
    assertFalse(output.hasNext());
}

Example 17 with DriverYieldSignal

use of io.prestosql.operator.DriverYieldSignal in project hetu-core by openlookeng.

the class TestPageProcessor method testProjectLazyLoad.

@Test
public void testProjectLazyLoad() {
    PageProcessor pageProcessor = new PageProcessor(Optional.of(new SelectAllFilter()), ImmutableList.of(new LazyPagePageProjection()), OptionalInt.of(MAX_BATCH_SIZE));
    // if channel 1 is loaded, test will fail
    Page inputPage = new Page(createLongSequenceBlock(0, 100), new LazyBlock(100, lazyBlock -> {
        throw new AssertionError("Lazy block should not be loaded");
    }));
    LocalMemoryContext memoryContext = newSimpleAggregatedMemoryContext().newLocalMemoryContext(PageProcessor.class.getSimpleName());
    Iterator<Optional<Page>> output = pageProcessor.process(SESSION, new DriverYieldSignal(), memoryContext, inputPage);
    List<Optional<Page>> outputPages = ImmutableList.copyOf(output);
    assertEquals(outputPages.size(), 1);
    assertPageEquals(ImmutableList.of(BIGINT), outputPages.get(0).orElse(null), new Page(createLongSequenceBlock(0, 100)));
}

Example 18 with DriverYieldSignal

use of io.prestosql.operator.DriverYieldSignal in project hetu-core by openlookeng.

the class TestDictionaryAwarePageProjection method testProjectFastReturnIgnoreYield.

private static void testProjectFastReturnIgnoreYield(Block block, DictionaryAwarePageProjection projection) {
    DriverYieldSignal yieldSignal = new DriverYieldSignal();
    Work<Block> work = projection.project(null, yieldSignal, new Page(block), SelectedPositions.positionsRange(5, 10));
    yieldSignal.setWithDelay(1, executor);
    yieldSignal.forceYieldForTesting();
    // yield signal is ignored given the block has already been loaded
    assertTrue(work.process());
    Block result = work.getResult();
    yieldSignal.reset();
    assertBlockEquals(BIGINT, result, block.getRegion(5, 10));
    assertInstanceOf(result, DictionaryBlock.class);
}

Example 19 with DriverYieldSignal

use of io.prestosql.operator.DriverYieldSignal in project hetu-core by openlookeng.

the class TestPageProcessorCompiler method testSanityRLE.

@Test
public void testSanityRLE() {
    PageProcessor processor = compiler.compilePageProcessor(Optional.empty(), ImmutableList.of(field(0, BIGINT), field(1, VARCHAR)), MAX_BATCH_SIZE).get();
    Slice varcharValue = Slices.utf8Slice("hello");
    Page page = new Page(RunLengthEncodedBlock.create(BIGINT, 123L, 100), RunLengthEncodedBlock.create(VARCHAR, varcharValue, 100));
    Page outputPage = getOnlyElement(processor.process(null, new DriverYieldSignal(), newSimpleAggregatedMemoryContext().newLocalMemoryContext(PageProcessor.class.getSimpleName()), page)).orElseThrow(() -> new AssertionError("page is not present"));
    assertEquals(outputPage.getPositionCount(), 100);
    assertTrue(outputPage.getBlock(0) instanceof RunLengthEncodedBlock);
    assertTrue(outputPage.getBlock(1) instanceof RunLengthEncodedBlock);
    RunLengthEncodedBlock rleBlock = (RunLengthEncodedBlock) outputPage.getBlock(0);
    assertEquals(BIGINT.getLong(rleBlock.getValue(), 0), 123L);
    RunLengthEncodedBlock rleBlock1 = (RunLengthEncodedBlock) outputPage.getBlock(1);
    assertEquals(VARCHAR.getSlice(rleBlock1.getValue(), 0), varcharValue);
}

Example 20 with DriverYieldSignal

use of io.prestosql.operator.DriverYieldSignal in project hetu-core by openlookeng.

the class TestPageProcessorCompiler method testSanityColumnarDictionary.

@Test
public void testSanityColumnarDictionary() {
    PageProcessor processor = compiler.compilePageProcessor(Optional.empty(), ImmutableList.of(field(0, VARCHAR)), MAX_BATCH_SIZE).get();
    Page page = new Page(createDictionaryBlock(createExpectedValues(10), 100));
    Page outputPage = getOnlyElement(processor.process(null, new DriverYieldSignal(), newSimpleAggregatedMemoryContext().newLocalMemoryContext(PageProcessor.class.getSimpleName()), page)).orElseThrow(() -> new AssertionError("page is not present"));
    assertEquals(outputPage.getPositionCount(), 100);
    assertTrue(outputPage.getBlock(0) instanceof DictionaryBlock);
    DictionaryBlock dictionaryBlock = (DictionaryBlock) outputPage.getBlock(0);
    assertEquals(dictionaryBlock.getDictionary().getPositionCount(), 10);
}