Package com.facebook.presto.block

Examples of com.facebook.presto.block.BlockCursor

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        }

        @Override
        protected void processInput(Block block, Optional<Block> maskBlock)
        {
            BlockCursor values = block.cursor();

            for (int position = 0; position < block.getPositionCount(); position++) {
                checkState(values.advanceNextPosition());
                if (!values.isNull()) {
                    notNull = true;

                    // if value is false, update the max to false
                    if (!values.getBoolean()) {
                        min = false;
                    }
                }
            }
        }
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        protected void processInput(GroupByIdBlock groupIdsBlock, Block valuesBlock, Optional<Block> maskBlock)
        {
            notNull.ensureCapacity(groupIdsBlock.getGroupCount());
            minValues.ensureCapacity(groupIdsBlock.getGroupCount(), Long.MAX_VALUE);

            BlockCursor values = valuesBlock.cursor();

            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                checkState(values.advanceNextPosition());

                long groupId = groupIdsBlock.getGroupId(position);

                if (!values.isNull()) {
                    notNull.set(groupId, true);

                    long value = values.getLong();
                    value = Math.min(value, minValues.get(groupId));
                    minValues.set(groupId, value);
                }
            }
            checkState(!values.advanceNextPosition());
        }
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        }

        @Override
        protected void processInput(Block block, Optional<Block> maskBlock)
        {
            BlockCursor values = block.cursor();

            for (int position = 0; position < block.getPositionCount(); position++) {
                checkState(values.advanceNextPosition());
                if (!values.isNull()) {
                    notNull = true;
                    min = Math.min(min, values.getLong());
                }
            }
        }
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        {
            checkArgument(percentileChannel != -1, "Raw input is not allowed for a final aggregation");

            digests.ensureCapacity(groupIdsBlock.getGroupCount());

            BlockCursor values = page.getBlock(valueChannel).cursor();
            BlockCursor percentiles = page.getBlock(percentileChannel).cursor();
            BlockCursor masks = null;
            if (maskChannel.isPresent()) {
                masks = page.getBlock(maskChannel.get()).cursor();
            }

            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                checkState(values.advanceNextPosition());
                checkState(percentiles.advanceNextPosition());
                checkState(masks == null || masks.advanceNextPosition());

                long groupId = groupIdsBlock.getGroupId(position);

                // skip null values
                if (!values.isNull() && (masks == null || masks.getBoolean())) {
                    DigestAndPercentile currentValue = digests.get(groupId);
                    if (currentValue == null) {
                        currentValue = new DigestAndPercentile(new QuantileDigest(0.01));
                        digests.set(groupId, currentValue);
                        sizeOfValues += currentValue.getDigest().estimatedInMemorySizeInBytes();
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        {
            checkArgument(percentileChannel == -1, "Intermediate input is only allowed for a final aggregation");

            digests.ensureCapacity(groupIdsBlock.getGroupCount());

            BlockCursor intermediates = block.cursor();

            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                checkState(intermediates.advanceNextPosition());

                if (!intermediates.isNull()) {
                    long groupId = groupIdsBlock.getGroupId(position);

                    DigestAndPercentile currentValue = digests.get(groupId);
                    if (currentValue == null) {
                        currentValue = new DigestAndPercentile(new QuantileDigest(0.01));
                        digests.set(groupId, currentValue);
                        sizeOfValues += currentValue.getDigest().estimatedInMemorySizeInBytes();
                    }

                    SliceInput input = intermediates.getSlice().getInput();

                    // read digest
                    sizeOfValues -= currentValue.getDigest().estimatedInMemorySizeInBytes();
                    currentValue.getDigest().merge(QuantileDigest.deserialize(input));
                    sizeOfValues += currentValue.getDigest().estimatedInMemorySizeInBytes();
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        @Override
        public void addInput(Page page)
        {
            checkArgument(valueChannel != -1, "Raw input is not allowed for a final aggregation");

            BlockCursor values = page.getBlock(valueChannel).cursor();
            BlockCursor percentiles = page.getBlock(percentileChannel).cursor();
            BlockCursor masks = null;
            if (maskChannel.isPresent()) {
                masks = page.getBlock(maskChannel.get()).cursor();
            }

            for (int position = 0; position < page.getPositionCount(); position++) {
                checkState(values.advanceNextPosition());
                checkState(percentiles.advanceNextPosition());
                checkState(masks == null || masks.advanceNextPosition());

                if (!values.isNull() && (masks == null || masks.getBoolean())) {
                    addValue(digest, values, parameterType);

                    // use last non-null percentile
                    if (!percentiles.isNull()) {
                        percentile = percentiles.getDouble();
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        @Override
        public void addIntermediate(Block block)
        {
            checkArgument(valueChannel == -1, "Intermediate input is only allowed for a final aggregation");

            BlockCursor intermediates = block.cursor();

            for (int position = 0; position < block.getPositionCount(); position++) {
                checkState(intermediates.advanceNextPosition());
                if (!intermediates.isNull()) {
                    SliceInput input = intermediates.getSlice().getInput();
                    // read digest
                    digest.merge(QuantileDigest.deserialize(input));
                    // read percentile
                    percentile = input.readDouble();
                }
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    public void addInput(Page page)
    {
        checkNotNull(page, "page is null");
        checkState(state == State.RUNNING, "Operator is %s", state);

        BlockCursor rowCountCursor = page.getBlock(0).cursor();
        BlockCursor fragmentCursor = page.getBlock(1).cursor();
        for (int i = 0; i < page.getPositionCount(); i++) {
            checkArgument(rowCountCursor.advanceNextPosition());
            checkArgument(fragmentCursor.advanceNextPosition());
            rowCount += rowCountCursor.getLong(0);
            fragmentBuilder.add(fragmentCursor.getSlice(0).toStringUtf8());
        }
    }
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        {
            counts.ensureCapacity(groupIdsBlock.getGroupCount());
            means.ensureCapacity(groupIdsBlock.getGroupCount());
            m2s.ensureCapacity(groupIdsBlock.getGroupCount());

            BlockCursor values = valuesBlock.cursor();
            BlockCursor masks = null;
            if (maskBlock.isPresent()) {
                masks = maskBlock.get().cursor();
            }

            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                checkState(values.advanceNextPosition());
                checkState(masks == null || masks.advanceNextPosition());

                if (!values.isNull() && (masks == null || masks.getBoolean())) {
                    long groupId = groupIdsBlock.getGroupId(position);
                    double inputValue;
                    if (inputIsLong) {
                        inputValue = values.getLong();
                    }
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        {
            counts.ensureCapacity(groupIdsBlock.getGroupCount());
            means.ensureCapacity(groupIdsBlock.getGroupCount());
            m2s.ensureCapacity(groupIdsBlock.getGroupCount());

            BlockCursor values = valuesBlock.cursor();

            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                checkState(values.advanceNextPosition());

                if (!values.isNull()) {
                    long groupId = groupIdsBlock.getGroupId(position);

                    Slice slice = values.getSlice();
                    long inputCount = getCount(slice);
                    double inputMean = getMean(slice);
                    double inputM2 = getM2(slice);

                    long currentCount = counts.get(groupId);
                    double currentMean = means.get(groupId);
                    double currentM2 = m2s.get(groupId);

                    // Use numerically stable variant
                    long newCount = currentCount + inputCount;
                    double newMean = ((currentCount * currentMean) + (inputCount * inputMean)) / newCount;
                    double delta = inputMean - currentMean;
                    double newM2 = currentM2 + inputM2 + ((delta * delta) * (currentCount * inputCount)) / newCount;

                    counts.set(groupId, newCount);
                    means.set(groupId, newMean);
                    m2s.set(groupId, newM2);
                }
            }
            checkState(!values.advanceNextPosition());
        }
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