Examples of com.facebook.presto.spi.block.BlockCursor

com.facebook.presto.spi.block.BlockCursor

Iterate as:

 {@code Cursor cursor = ...; }while (cursor.advanceNextPosition())  long value = cursor.getLong(...); ... } }

        }


        @Override
        protected void processInput(Block block, Optional<Block> maskBlock, Optional<Block> sampleWeightBlock)
        {
            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());
                }
            }
        }

View Full Code Here

        @Override
        public void addInput(GroupByIdBlock groupIdsBlock, Page page)
        {
            counts.ensureCapacity(groupIdsBlock.getGroupCount());
            samples.ensureCapacity(groupIdsBlock.getGroupCount());
            BlockCursor masks = null;
            if (maskChannel.isPresent()) {
                masks = page.getBlock(maskChannel.get()).cursor();
            }
            BlockCursor sampleWeights = page.getBlock(sampleWeightChannel).cursor();


            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                long groupId = groupIdsBlock.getGroupId(position);
                checkState(masks == null || masks.advanceNextPosition(), "failed to advance mask cursor");
                checkState(sampleWeights.advanceNextPosition(), "failed to advance weight cursor");
                long weight = SimpleAggregationFunction.computeSampleWeight(masks, sampleWeights);
                counts.add(groupId, weight);
                if (weight > 0) {
                    samples.increment(groupId);
                }

View Full Code Here

        public void addIntermediate(GroupByIdBlock groupIdsBlock, Block block)
        {
            counts.ensureCapacity(groupIdsBlock.getGroupCount());
            samples.ensureCapacity(groupIdsBlock.getGroupCount());


            BlockCursor intermediates = block.cursor();


            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                checkState(intermediates.advanceNextPosition(), "failed to advance intermediates cursor");


                long groupId = groupIdsBlock.getGroupId(position);
                Slice slice = intermediates.getSlice();
                counts.add(groupId, slice.getLong(COUNT_OFFSET));
                samples.add(groupId, slice.getLong(SAMPLES_OFFSET));
            }
        }

View Full Code Here

        }


        @Override
        public void addInput(Page page)
        {
            BlockCursor masks = null;
            if (maskChannel.isPresent()) {
                masks = page.getBlock(maskChannel.get()).cursor();
            }
            BlockCursor sampleWeights = page.getBlock(sampleWeightChannel).cursor();


            for (int i = 0; i < page.getPositionCount(); i++) {
                checkState(masks == null || masks.advanceNextPosition(), "failed to advance mask cursor");
                checkState(sampleWeights.advanceNextPosition(), "failed to advance weight cursor");
                long weight = SimpleAggregationFunction.computeSampleWeight(masks, sampleWeights);
                count += weight;
                if (weight > 0) {
                    samples++;
                }

View Full Code Here

        }


        @Override
        public void addIntermediate(Block block)
        {
            BlockCursor intermediates = block.cursor();


            for (int position = 0; position < block.getPositionCount(); position++) {
                checkState(intermediates.advanceNextPosition(), "failed to advance intermediates cursor");
                Slice slice = intermediates.getSlice();
                count += slice.getLong(COUNT_OFFSET);
                samples += slice.getLong(SAMPLES_OFFSET);
            }
        }

View Full Code Here


        @Override
        public void addInput(GroupByIdBlock groupIdsBlock, Page page)
        {
            counts.ensureCapacity(groupIdsBlock.getGroupCount());
            BlockCursor masks = maskChannel.isPresent() ? page.getBlock(maskChannel.get()).cursor() : null;
            BlockCursor sampleWeights = sampleWeightChannel.isPresent() ? page.getBlock(sampleWeightChannel.get()).cursor() : null;


            for (int position = 0; position < groupIdsBlock.getPositionCount(); position++) {
                long groupId = groupIdsBlock.getGroupId(position);
                checkState(masks == null || masks.advanceNextPosition());
                checkState(sampleWeights == null || sampleWeights.advanceNextPosition());
                counts.add(groupId, SimpleAggregationFunction.computeSampleWeight(masks, sampleWeights));
            }
        }

View Full Code Here

        @Override
        public void addIntermediate(GroupByIdBlock groupIdsBlock, Block block)
        {
            counts.ensureCapacity(groupIdsBlock.getGroupCount());


            BlockCursor intermediates = block.cursor();


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


                long groupId = groupIdsBlock.getGroupId(position);
                counts.add(groupId, intermediates.getLong());
            }
        }

View Full Code Here

        {
            if (!maskChannel.isPresent() && !sampleWeightChannel.isPresent()) {
                count += page.getPositionCount();
            }
            else {
                BlockCursor masks = null;
                if (maskChannel.isPresent()) {
                    masks = page.getBlock(maskChannel.get()).cursor();
                }
                BlockCursor sampleWeights = null;
                if (sampleWeightChannel.isPresent()) {
                    sampleWeights = page.getBlock(sampleWeightChannel.get()).cursor();
                }
                for (int i = 0; i < page.getPositionCount(); i++) {
                    checkState(masks == null || masks.advanceNextPosition());
                    checkState(sampleWeights == null || sampleWeights.advanceNextPosition());
                    count += SimpleAggregationFunction.computeSampleWeight(masks, sampleWeights);
                }
            }
        }

View Full Code Here

        }


        @Override
        public void addIntermediate(Block block)
        {
            BlockCursor intermediates = block.cursor();


            for (int position = 0; position < block.getPositionCount(); position++) {
                checkState(intermediates.advanceNextPosition());
                count += intermediates.getLong();
            }
        }

View Full Code Here


    public BlockCursor[] duplicateCursors()
    {
        BlockCursor[] duplicates = new BlockCursor[cursors.size()];
        for (int i = 0; i < cursors.size(); i++) {
            BlockCursor cursor = cursors.get(i);
            duplicates[i] = cursor.duplicate();
        }
        return duplicates;
    }

View Full Code Here

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