Examples with ByteArrayBlock com.facebook.presto.common.block.ByteArrayBlock used on opensource projects

Example 11 with ByteArrayBlock

use of com.facebook.presto.common.block.ByteArrayBlock in project presto by prestodb.

the class TestMapBlock method testCompactBlock.

@Test
public void testCompactBlock() {
    Block emptyBlock = new ByteArrayBlock(0, Optional.empty(), new byte[0]);
    Block compactKeyBlock = new ByteArrayBlock(16, Optional.empty(), createExpectedValue(16).getBytes());
    Block compactValueBlock = new ByteArrayBlock(16, Optional.empty(), createExpectedValue(16).getBytes());
    Block inCompactKeyBlock = new ByteArrayBlock(16, Optional.empty(), createExpectedValue(17).getBytes());
    Block inCompactValueBlock = new ByteArrayBlock(16, Optional.empty(), createExpectedValue(17).getBytes());
    int[] offsets = { 0, 1, 1, 2, 4, 8, 16 };
    boolean[] mapIsNull = { false, true, false, false, false, false };
    testCompactBlock(mapType(TINYINT, TINYINT).createBlockFromKeyValue(0, Optional.empty(), new int[1], emptyBlock, emptyBlock));
    testCompactBlock(mapType(TINYINT, TINYINT).createBlockFromKeyValue(mapIsNull.length, Optional.of(mapIsNull), offsets, compactKeyBlock, compactValueBlock));
    // TODO: Add test case for a sliced MapBlock
    // underlying key/value block is not compact
    testIncompactBlock(mapType(TINYINT, TINYINT).createBlockFromKeyValue(mapIsNull.length, Optional.of(mapIsNull), offsets, inCompactKeyBlock, inCompactValueBlock));
}

Example 12 with ByteArrayBlock

use of com.facebook.presto.common.block.ByteArrayBlock in project presto by prestodb.

the class ByteSelectiveStreamReader method getBlock.

@Override
public Block getBlock(int[] positions, int positionCount) {
    checkArgument(outputPositionCount > 0, "outputPositionCount must be greater than zero");
    checkState(outputRequired, "This stream reader doesn't produce output");
    checkState(positionCount <= outputPositionCount, "Not enough values");
    checkState(!valuesInUse, "BlockLease hasn't been closed yet");
    if (allNulls) {
        return new RunLengthEncodedBlock(NULL_BLOCK, positionCount);
    }
    boolean includeNulls = nullsAllowed && presentStream != null;
    if (positionCount == outputPositionCount) {
        Block block = new ByteArrayBlock(positionCount, Optional.ofNullable(includeNulls ? nulls : null), values);
        nulls = null;
        values = null;
        return block;
    }
    byte[] valuesCopy = new byte[positionCount];
    boolean[] nullsCopy = null;
    if (includeNulls) {
        nullsCopy = new boolean[positionCount];
    }
    int positionIndex = 0;
    int nextPosition = positions[positionIndex];
    for (int i = 0; i < outputPositionCount; i++) {
        if (outputPositions[i] < nextPosition) {
            continue;
        }
        assert outputPositions[i] == nextPosition;
        valuesCopy[positionIndex] = this.values[i];
        if (nullsCopy != null) {
            nullsCopy[positionIndex] = this.nulls[i];
        }
        positionIndex++;
        if (positionIndex >= positionCount) {
            break;
        }
        nextPosition = positions[positionIndex];
    }
    return new ByteArrayBlock(positionCount, Optional.ofNullable(nullsCopy), valuesCopy);
}