presto-main/src/main/java/io/prestosql/operator/SimplePagesHashStrategy.java/SimplePagesHashStrategy/positionEqualsPosition
class SimplePagesHashStrategy:    @Override
    public boolean positionEqualsPosition(int leftBlockIndex, int leftPosition, int rightBlockIndex, int rightPosition)
    {
        for (int hashChannel : hashChannels) {
            Type type = types.get(hashChannel);
            List<Block> channel = channels.get(hashChannel);
            Block leftBlock = channel.get(leftBlockIndex);
            Block rightBlock = channel.get(rightBlockIndex);
            if (!TypeUtils.positionEqualsPosition(type, leftBlock, leftPosition, rightBlock, rightPosition)) {
                return false;
            }
        }
        return true;
    }