This Week in Databend #141

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

Stay informed about the latest features of Databend.

Enhancing Full-Text Search

Databend has enhanced the full-text search capabilities by extending and optimizing the match and query functions. This allows users to perform precise searches and retrieve data based on complex requirements.

match function support multiple fields with boost and only support query text without syntax
query function support search with query syntax:
1. simple terms, like title:quick
2. bool operator terms, like title:fox AND dog OR cat
3. must and negative operator terms, like title:+fox -cat
4. phrase terms, like title:"quick brown fox"
5. multiple field with boost terms, like title:fox^5 content:dog^2

If you would like to learn more, please contact the Databend team or refer to the resources listed below:

PR #15196 | feat(query): match function support multiple fields with boost

Code Corner

Discover some fascinating code snippets or projects that showcase our work or learning journey.

Updating Deployment Documentation

The documentation for deploying Databend has been recently updated. Feel free to read and learn about Docker and the cluster deployment process in detail.

Highlights

We have also made these improvements to Databend that we hope you will find helpful:

Added support for using CTEs in update and insert statements.
Made create table as select atomic.

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.

Adding Support for SEQUENCE

The SEQUENCE object and the nextval function are used to retrieve and increment a sequence.

We can use MetaSrv's built-in sequence feature. When we call nextval, it updates the metadata for seq1 and returns a unique number from MetaSrv for each object. Although the sequence may not be contiguous, it always auto-increments.

CREATE OR REPLACE SEQUENCE seq1;
create table t1(a bigint, b string);
insert into t1 values(nextval(seq1), 'b');

SELECT nextval(seq1);
---------
     102

Issue #15180 | feat: CREATE OR REPLACE SEQUENCE

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