2018-03-19-tidb-weekly.md

title	date	summary	tags
Weekly update (March 12 ~ March 18, 2018)	2018-03-19	Last week, we landed 60 PRs in the TiDB repositories, 14 PRs in the TiSpark repositories, and 29 PRs in the TiKV and PD repositories.	TiDB TiKV PD TiSpark

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