Thank you, this design is very reasonable and I will adopt it.
> 2024年6月27日 下午6:46，Jingsong Li <jingsongl...@gmail.com> 写道：
>
> Thanks guanshi for starting this discussion.
>
> I saw your suggestion in the document regarding omitting certain
> fields. The question is whether we should introduce a compact format.
>
> Indeed, there may be situations where there are many values, and
> introducing a compact format makes sense.
>
> Consider:
>
> -- head
> version: 1 byte
> row count: 4 bytes int
> non-null value bitmap number: 4 bytes int
> has null value: 1 byte
> null value offset: 4 bytes if has null value
> value x: var bytes for any data type (as
> bitmap identifier)
> offset: 4 bytes int
>
> -- body
> serialized bitmap1
> serialized bitmap2
> serialized bitmap3
>
> Optimization:
>
> Offset can be a negative number, and when it is negative, it
> represents that there is only one value, and its position is the
> inverse of the negative value.
>
> Best,
> Jingsong
>
> On Thu, Jun 27, 2024 at 3:50 PM guanshi <1649067...@qq.com.invalid> wrote:
>>
>> Hello, this is the bitmap index format I designed, and I hope to discuss it
>> with everyone:
>> https://docs.google.com/document/d/1zKp_kqfoYgfmvfZ3DcNVMIXoYdxAsbe73eu98KEe3a8/edit?usp=sharing
