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This Week in Databend #80

February 8, 2023 · 4 min read

PsiACE

Databend is a modern cloud data warehouse, serving your massive-scale analytics needs at low cost and complexity. Open source alternative to Snowflake. Also available in the cloud: .


Databend is a modern cloud data warehouse, serving your massive-scale analytics needs at low cost and complexity. Open source alternative to Snowflake. Also available in the cloud: https://app.databend.com .

What's New

Check out what we've done this week to make Databend even better for you.

Features & Improvements ✨

Meta

  • add databend-meta config grpc_api_advertise_host (#9835)

AST

  • select from stage with files/pattern (#9877)
  • parse decimal type (#9894)

Expression

  • add Decimal128 and Decimal256 type (#9856)

Functions

  • support array_indexof (#9840)
  • support array function array_unique, array_distinct (#9875)
  • support array aggregate functions (#9903)

Query

  • add column id in TableSchema; use column id instead of index when read and write data (#9623)
  • support view in system.columns (#9853)

Storage

  • ParquetTable support topk optimization (#9824)

Sqllogictest

  • leverage sqllogictest to benchmark tpch (#9887)

Code Refactoring 🎉

Meta

  • remove obsolete meta service api read_msg() and write_msg() (#9891)
  • simplify UserAPI and RoleAPI by introducing a method update_xx_with(id, f: FnOnce) (#9921)

Cluster

  • split exchange source to reader and deserializer (#9805)
  • split and eliminate the status for exchange transform and sink (#9910)

Functions

  • rename some array functions add array_ prefix (#9886)

Query

  • TableArgs preserve info of positioned and named args (#9917)

Storage

  • ParquetTable list file in read_partition (#9871)

Build/Testing/CI Infra Changes 🔌

  • support for running benchmark on PRs (#9788)

Bug Fixes 🔧

Functions

  • fix nullable and or domain cal (#9928)

Planner

  • fix slow planner when ndv error backtrace (#9876)
  • fix order by contains aggregation function (#9879)
  • prevent panic when delete with subquery (#9902)

Query

  • fix insert default value datatype (#9816)

What's On In Databend

Stay connected with the latest news about Databend.

Why You Should Try Sccache

Sccache is a ccache-like project started by the Mozilla team, supporting C/CPP, Rust and other languages, and storing caches locally or in a cloud storage backend. The community first added native support for the GitHub Action Cache Service to Sccache in version 0.3.3, then improved the functionality in v0.4.0-pre.6 so that the production CI can now use it.

Now, opendal, open-sourced by Datafuse Labs, acts as a storage access layer for sccache to interface with various storage services (s3/gcs/azlob etc.).

Learn More

What's Up Next

We're always open to cutting-edge technologies and innovative ideas. You're more than welcome to join the community and bring them to Databend.

Try using build-info

To get information about git commits, build options and credits, we now use vergen and cargo-license.

build-info can collect build-information of your Rust crate. It might be possible to use it to refactor the relevant logic in common-building.

pub struct BuildInfo {
pub timestamp: DateTime<Utc>,
pub profile: String,
pub optimization_level: OptimizationLevel,
pub crate_info: CrateInfo,
pub compiler: CompilerInfo,
pub version_control: Option<VersionControl>,
}

Issue 9874: Refactor: Try using build-info

Please let us know if you're interested in contributing to this issue, or pick up a good first issue at https://link.databend.rs/i-m-feeling-lucky to get started.

Changelog

You can check the changelog of Databend Nightly for details about our latest developments.

Contributors

Thanks a lot to the contributors for their excellent work this week.

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andylokandyariesdevilb41shBohuTANGdependabot[bot]drmingdrmer
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PsiACERinChanNOWWWsoyeric128sundy-liTCeasonXuanwo
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🎈Connect With Us

Databend is a cutting-edge, open-source cloud-native warehouse built with Rust, designed to handle massive-scale analytics.

Join the Databend Community to try, get help, and contribute!