TiDB Weekly

News & blog post

Nick Cameron is a long-time Rust programmer who has recently started using Go. Last week, we published a post in which he talks about his early impressions of Go. Read this post to learn more:

Early Impressions of Go from a Rust Programmer

Community

New contributors

tidb:

• mgkanani
• wangwangwar

tikv:

• ZiheLiu
• govardhangdg
• lsampras

docs:

• ldnvnbl

tidb-operator:

• u5surf
• Smana

parser:

• dasinlsb

chaos-mesh:

• Gallardot

Call for participation

• Issues to solve for TiDB
• Issues to solve for TiKV

Updates of the week

Progress

Last week, we landed 68 PRs in the TiDB repository and 58 PRs in the TiKV and PD repositories.

Critical PRs

TiDB:

• Add more metrics table for the diagnosis report
• Support changing more configuration items online
• Show the CAST type in the EXPLAIN statement
• Fold the constant in the projection elimination and Top-N push-down
• Consider collations when comparing strings
• Support index encoding or decoding for the new collation
• Disable pushing down the Duration or JSON-related function to TiFlash
• Support the SELECT INTO ... OUTFILE syntax
• Implement the sequence allocator
• Enable the inline projection for Hash Join
• Improve the projection to keep the order or keep the index in some cases

TiKV and PD:

• Avoid handling requests for multiple times
• Let the collated GROUP BY column return the original data
• Return values when acquiring pessimistic locks successfully
• Fix the panic caused by not destroying apply fsm in some cases
• Wake up the hibernated leader after the failed read index
• Wake up the Raft leader for more cases
• Wake up the Raft leader on the proposal
• Introduce the solution-based balance solver

Upcoming TiDB event

TiDB Usability Challenge Program