Examples with TypeUtils.getHashBlock com.facebook.presto.type.TypeUtils.getHashBlock used on opensource projects

Example 1 with TypeUtils.getHashBlock

use of com.facebook.presto.type.TypeUtils.getHashBlock in project presto by prestodb.

the class TestGroupByHash method testAppendToMultipleTuplesPerGroup.

@Test
public void testAppendToMultipleTuplesPerGroup() throws Exception {
    List<Long> values = new ArrayList<>();
    for (long i = 0; i < 100; i++) {
        values.add(i % 50);
    }
    Block valuesBlock = BlockAssertions.createLongsBlock(values);
    Block hashBlock = TypeUtils.getHashBlock(ImmutableList.of(BIGINT), valuesBlock);
    GroupByHash groupByHash = createGroupByHash(TEST_SESSION, ImmutableList.of(BIGINT), new int[] { 0 }, Optional.of(1), 100, JOIN_COMPILER);
    groupByHash.getGroupIds(new Page(valuesBlock, hashBlock));
    assertEquals(groupByHash.getGroupCount(), 50);
    PageBuilder pageBuilder = new PageBuilder(groupByHash.getTypes());
    for (int i = 0; i < groupByHash.getGroupCount(); i++) {
        pageBuilder.declarePosition();
        groupByHash.appendValuesTo(i, pageBuilder, 0);
    }
    Page outputPage = pageBuilder.build();
    assertEquals(outputPage.getPositionCount(), 50);
    BlockAssertions.assertBlockEquals(BIGINT, outputPage.getBlock(0), BlockAssertions.createLongSequenceBlock(0, 50));
}

Example 2 with TypeUtils.getHashBlock

use of com.facebook.presto.type.TypeUtils.getHashBlock in project presto by prestodb.

the class TestGroupByHash method testForceRehash.

@Test
public void testForceRehash() throws Exception {
    // Create a page with positionCount >> expected size of groupByHash
    Block valuesBlock = BlockAssertions.createStringSequenceBlock(0, 100);
    Block hashBlock = TypeUtils.getHashBlock(ImmutableList.of(VARCHAR), valuesBlock);
    // Create group by hash with extremely small size
    GroupByHash groupByHash = createGroupByHash(TEST_SESSION, ImmutableList.of(VARCHAR), new int[] { 0 }, Optional.of(1), 4, JOIN_COMPILER);
    groupByHash.getGroupIds(new Page(valuesBlock, hashBlock));
    // Ensure that all groups are present in group by hash
    for (int i = 0; i < valuesBlock.getPositionCount(); i++) {
        assertTrue(groupByHash.contains(i, new Page(valuesBlock, hashBlock), CONTAINS_CHANNELS));
    }
}

Example 3 with TypeUtils.getHashBlock

use of com.facebook.presto.type.TypeUtils.getHashBlock in project presto by prestodb.

the class TestGroupByHash method testContainsMultipleColumns.

@Test
public void testContainsMultipleColumns() throws Exception {
    Block valuesBlock = BlockAssertions.createDoubleSequenceBlock(0, 10);
    Block stringValuesBlock = BlockAssertions.createStringSequenceBlock(0, 10);
    Block hashBlock = TypeUtils.getHashBlock(ImmutableList.of(DOUBLE, VARCHAR), valuesBlock, stringValuesBlock);
    int[] hashChannels = { 0, 1 };
    GroupByHash groupByHash = createGroupByHash(TEST_SESSION, ImmutableList.of(DOUBLE, VARCHAR), hashChannels, Optional.of(2), 100, JOIN_COMPILER);
    groupByHash.getGroupIds(new Page(valuesBlock, stringValuesBlock, hashBlock));
    Block testValuesBlock = BlockAssertions.createDoublesBlock((double) 3);
    Block testStringValuesBlock = BlockAssertions.createStringsBlock("3");
    Block testHashBlock = TypeUtils.getHashBlock(ImmutableList.of(DOUBLE, VARCHAR), testValuesBlock, testStringValuesBlock);
    assertTrue(groupByHash.contains(0, new Page(testValuesBlock, testStringValuesBlock, testHashBlock), hashChannels));
}

Example 4 with TypeUtils.getHashBlock

use of com.facebook.presto.type.TypeUtils.getHashBlock in project presto by prestodb.

the class TestGroupByHash method testAddPage.

@Test
public void testAddPage() throws Exception {
    GroupByHash groupByHash = createGroupByHash(TEST_SESSION, ImmutableList.of(BIGINT), new int[] { 0 }, Optional.of(1), 100, JOIN_COMPILER);
    for (int tries = 0; tries < 2; tries++) {
        for (int value = 0; value < MAX_GROUP_ID; value++) {
            Block block = BlockAssertions.createLongsBlock(value);
            Block hashBlock = TypeUtils.getHashBlock(ImmutableList.of(BIGINT), block);
            Page page = new Page(block, hashBlock);
            for (int addValuesTries = 0; addValuesTries < 10; addValuesTries++) {
                groupByHash.addPage(page);
                assertEquals(groupByHash.getGroupCount(), tries == 0 ? value + 1 : MAX_GROUP_ID);
                // add the page again using get group ids and make sure the group count didn't change
                GroupByIdBlock groupIds = groupByHash.getGroupIds(page);
                assertEquals(groupByHash.getGroupCount(), tries == 0 ? value + 1 : MAX_GROUP_ID);
                assertEquals(groupIds.getGroupCount(), tries == 0 ? value + 1 : MAX_GROUP_ID);
                // verify the first position
                assertEquals(groupIds.getPositionCount(), 1);
                long groupId = groupIds.getGroupId(0);
                assertEquals(groupId, value);
            }
        }
    }
}

Example 5 with TypeUtils.getHashBlock

use of com.facebook.presto.type.TypeUtils.getHashBlock in project presto by prestodb.

the class TestGroupByHash method testAppendTo.

@Test
public void testAppendTo() throws Exception {
    Block valuesBlock = BlockAssertions.createStringSequenceBlock(0, 100);
    Block hashBlock = TypeUtils.getHashBlock(ImmutableList.of(VARCHAR), valuesBlock);
    GroupByHash groupByHash = createGroupByHash(TEST_SESSION, ImmutableList.of(VARCHAR), new int[] { 0 }, Optional.of(1), 100, JOIN_COMPILER);
    GroupByIdBlock groupIds = groupByHash.getGroupIds(new Page(valuesBlock, hashBlock));
    for (int i = 0; i < groupIds.getPositionCount(); i++) {
        assertEquals(groupIds.getGroupId(i), i);
    }
    assertEquals(groupByHash.getGroupCount(), 100);
    PageBuilder pageBuilder = new PageBuilder(groupByHash.getTypes());
    for (int i = 0; i < groupByHash.getGroupCount(); i++) {
        pageBuilder.declarePosition();
        groupByHash.appendValuesTo(i, pageBuilder, 0);
    }
    Page page = pageBuilder.build();
    // Ensure that all blocks have the same positionCount
    for (int i = 0; i < groupByHash.getTypes().size(); i++) {
        assertEquals(page.getBlock(i).getPositionCount(), 100);
    }
    assertEquals(page.getPositionCount(), 100);
    BlockAssertions.assertBlockEquals(VARCHAR, page.getBlock(0), valuesBlock);
    BlockAssertions.assertBlockEquals(BIGINT, page.getBlock(1), hashBlock);
}