Weekly update in TiDB

Last week, we landed 60 PRs in the TiDB repositories.

Added

• Collect query feedbacks
• Support admin recover index
• Support retry and timeout for Coprocessor streaming API
• Export implicit rowid and use it in CRUD

Fixed

• Fix the column length when converting the column information for tinyint
• Add the deprecation warning for builtin function PASSWORD
• Add missing columns in collations_information_applicability
• Fix the comparison between uint and int
• Fix the index iterator for unique index with a null value
• Fix insert into t1 (select * from t)
• Fix a bug when performing column substitution for join
• Change makeJoinRowToChunk to account for virtual rows
• Rollback the transaction when Compile returns error

Improved

• Add a unit test for distsql.go
• Add the isolation test
• Show more information on DDL history

Weekly update in TiSpark

Last week, we landed 14 PRs in the TiSpark repositories and released 1.0-RC1.

Fixed

• Fix the downgrade index scan logic to make it easier to downgrade
• Fix the prefix index logic for covering index
• Fix 0000-00-00 related test cases
• Rename the configuration item from allow_index_double_read to allow_index_read
• Map non-binary encoding blob to String type
• Make histogram loading compatible with TiDB of the earlier version
• Suppress JSON mapping exception
• Fix error handling for OtherError cases
• Fix the problem that the decimal precision is too large

Improved

• Add statistics count in the plan for easier debugging

RC1 released

• RC1 is released

Weekly update in TiKV and PD

Last week, we landed 29 PRs in the TiKV and PD repositories.

Added

• Add raw_delete_range interface
• Support dump metrics
• Add metrics for PD member health
• Support merge
• Upgrade the indexmap
• Dump statistics of rocksdb and malloc
• Add the consistency-check subcommand to tikv-ctl
• Implement IngestSST API

Fixed

• Fix Region size calculation
• Apply a hotfix in murmur3
• Make the PD mock server ignore the sending failure
• Fix a bug that the help information always shows after help is used once
• Notify snapshot failure when resolving the remote address
• Fix the pd-ctl post bug when tls is enabled
• Fix a bug that too many pending Regions exist when checker adds peers to TiKV

Improved

• Poll significant message
• Make the balance scheduler do not depend on the average score
• Set the default value for wal_bytes_per_sync and bytes_per_sync
• Make it possible to call the apply process recursively
• Separate read pool configuration from name_prefix
• Add assertion for error cases
• Change the isolation level of PD Region label from Histogram to Gauge
• Reclaim the disk space aggressively after data is deleted
• Add Coprocessor streaming support

New contributors (Thanks!)

• TiKV: Hugo Wang
• Docs-cn: 康晓宁