Package com.facebook.presto.block

Examples of com.facebook.presto.block.BlockCursor

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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();

                    sizeOfValues -= currentValue.getDigest().estimatedInMemorySizeInBytes();
                    currentValue.getDigest().merge(QuantileDigest.deserialize(input));
                    sizeOfValues += currentValue.getDigest().estimatedInMemorySizeInBytes();
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        }

        @Override
        protected void processInput(Block block, Optional<Block> maskBlock)
        {
            BlockCursor values = block.cursor();
            BlockCursor masks = null;
            if (maskBlock.isPresent()) {
                masks = maskBlock.get().cursor();
            }

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

                if (!values.isNull() && (masks == null || masks.getBoolean())) {
                    double inputValue;
                    if (inputIsLong) {
                        inputValue = values.getLong();
                    }
                    else {
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        }

        @Override
        protected void processIntermediate(Block block)
        {
            BlockCursor values = block.cursor();

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

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

                    // 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;

                    currentCount = newCount;
                    currentMean = newMean;
                    currentM2 = newM2;
                }
            }
            checkState(!values.advanceNextPosition());
        }
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        @Override
        protected void processInput(GroupByIdBlock groupIdsBlock, Block valuesBlock, Optional<Block> maskBlock)
        {
            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());

                // skip null values
                if (!values.isNull() && (masks == null || masks.getBoolean())) {
                    long groupId = groupIdsBlock.getGroupId(position);

                    // todo do all of this with shifts and masks
                    long globalOffset = groupId * ENTRY_SIZE;
                    int sliceIndex = Ints.checkedCast(globalOffset / SLICE_SIZE);
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        @Override
        protected void processIntermediate(GroupByIdBlock groupIdsBlock, Block valuesBlock)
        {
            ensureCapacity(groupIdsBlock.getGroupCount());

            BlockCursor intermediates = valuesBlock.cursor();

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

                // skip null values
                if (!intermediates.isNull()) {
                    long groupId = groupIdsBlock.getGroupId(position);

                    // todo do all of this with shifts and masks
                    long globalOffset = groupId * ENTRY_SIZE;
                    int sliceIndex = Ints.checkedCast(globalOffset / SLICE_SIZE);
                    Slice slice = slices.get(sliceIndex);
                    int sliceOffset = Ints.checkedCast(globalOffset - (sliceIndex * SLICE_SIZE));

                    Slice input = intermediates.getSlice();

                    ESTIMATOR.mergeInto(slice, sliceOffset + 1, input, 0);
                    setNotNull(slice, sliceOffset);
                }
            }
            checkState(!intermediates.advanceNextPosition());
        }
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        }

        @Override
        protected void processInput(Block block, Optional<Block> maskBlock)
        {
            BlockCursor values = block.cursor();
            BlockCursor masks = null;
            if (maskBlock.isPresent()) {
                masks = maskBlock.get().cursor();
            }

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

                    long hash = hash(values, parameterType);
                    ESTIMATOR.update(hash, slice, 0);
                }
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        }

        @Override
        protected void processIntermediate(Block block)
        {
            BlockCursor intermediates = block.cursor();

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

                    Slice input = intermediates.getSlice();
                    ESTIMATOR.mergeInto(slice, 0, input, 0);
                }
            }
        }
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        protected void processInput(GroupByIdBlock groupIdsBlock, Block valuesBlock, Optional<Block> maskBlock)
        {
            notNull.ensureCapacity(groupIdsBlock.getGroupCount());
            minValues.ensureCapacity(groupIdsBlock.getGroupCount(), Double.POSITIVE_INFINITY);

            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);

                    double value = values.getDouble();
                    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.getDouble());
                }
            }
        }
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        @Override
        protected void processInput(GroupByIdBlock groupIdsBlock, Block valuesBlock, Optional<Block> maskBlock)
        {
            counts.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() && values.getBoolean() && (masks == null || masks.getBoolean())) {
                    long groupId = groupIdsBlock.getGroupId(position);
                    counts.increment(groupId);
                }
            }
            checkState(!values.advanceNextPosition());
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