This week in Databend #24

最新推荐文章于 2022-01-24 11:58:48 发布

原创最新推荐文章于 2022-01-24 11:58:48 发布 · 251 阅读

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Databend aimed to be an open source elastic and reliable cloud warehouse, it offers blazing fast query and combines elasticity, simplicity, low cost of the cloud, built to make the Data Cloud easy.

Big changes

Below is a list of some major changes that we don't want you to miss.

Features

meta support multi-tenant by @ariesdevil. (#3790)
support USE TENANT 'tenant_id' by @BohuTANG. (#3793)
add priv check by @flaneur2020. (#3710)

Improvement

range filter support multi-column expression by @zhyass. (#3835
refine transaction impl by @ariesdevil. (#3837)
add storage configs to system.configs by @lianghanzhen. (#3822)
split the apply_cmd function to sub functions by @lichuang. (#3831)
refine cache by @dantengsky. (#3798)
improve for expression monotonicity visitor by @zhyass. (#3783
simplify the grant verify logic by @flaneur2020. (#3804)

Bug fixes

MySQL driver compalibility by @TCeason. (#3830)

Tips

Let's learn a weekly tip from Databend.

New datatype system design

We need to redesign the datatype system because current implementation had some shortcomes.

Now, DataType is an enum type:

We must use specific type after matching.
We can't use it as generic argument.
It may involve some nested datatypes.
And hard to put attributes into it.

Want to find out how we will improve the DataType system? Please check the RFC - New datatype system design.

Plan to jump to specific implementation and track progress? Databend#3794 might be for you.

Changlogs

You can check the changelogs of Databend nightly to learn about our latest developments.

Ecosystem/Upstream

From open source, for open source. Our team is also committed to contributing to the Rust ecosystem and upstream dependencies.

anyerror: Error for transport in rust. by @drmingdrmer

Meet Us

Please join the DatafuseLabs Community if you are interested in Databend.

We are looking forward to seeing you try our code. We have a strong team behind you to ensure a smooth experience in trying our code for your projects. If you are a hacker passionate about database internals, feel free to play with our code.

You can submit issues for any problems you find. We also highly appreciate any of your pull requests.

如果想了解更多，可以关注公众号： Databend