TiDB Weekly

News & blog post

Don't wanna spend forever trying to locate bugs in massive code? Take a look at a bot built at TiDB Hackathon 2019 - it can automatically find faults in the code!

The full article is here:

Squashed Bugs, Served Hot and Fresh with Failure Rate Heatmaps

Community

New contributors

tidb:

• Aloxaf
• jiangyuzhao

tikv:

• zhangmoon
• chacha923
• zhang555

tidb-operator:

• mikechengwei

Call for participation

• Coprocessor SIG:

  • Improve the performance of Chunk Encoder
  • Implement more UDFs
  • Implement the new row format
  • Port BinaryJSON
  • Tracing
  • The maximum execution time of Per-request

• More issues to solve for TiDB

• More issues to solve for TiKV

Updates of the week

Progress

Last week, we landed 85 PRs in the TiDB repository, 4 PRs in the TiSpark repository, and 67 PRs in the TiKV and PD repositories.

Critical PRs

TiDB:

• Add three fields to the statement summary table in Infoschema
• Add ImplementationRule for Window in the cascades planner
• Add the index progress metrics in the DDL operation
• Check the foreign key constraint when dropping, modifying, and changing columns
• Support enabling or disabling the slow log by variables
• Trace the memory usage of projection executors
• Add the basic support for hidden columns

TiSpark:

• Fix the DESC temp view
• Rewrite the get decimal from Chunk

TiKV and PD:

• Fix the issue that the load cluster does not remove overlapping Regions
• Fix the panic caused by removing the tombstone
• Support adding gRPC dial options
• Add the diagnostics service
• Add the pluggable PD scheduler
• Support the incremental backup

Upcoming TiDB events

• Infra Meetup No.122 (in Chinese)

  Date: December 28th, 2019

• Infra Meetup No.123 (in Chinese)

  Date: December 28th, 2019