2018-05-21-tidb-weekly.md

title	date	summary	tags
Weekly update (May 14 ~ May 20, 2018)	2018-05-21	Last week, we landed 40 PRs in the TiDB repositories, 4 PRs in the TiSpark repositories, and 35 PRs in the TiKV and PD repositories.	TiDB TiKV PD TiSpark

Weekly update in TiDB

Last week, we landed 40 PRs in the TiDB repositories.

Added

• Support TIME and TIMESTAMP binary types for the PREPARE/EXECUTE statements
• Make tidb_build_stats_concurrency a global variable
• Support USE INDEX in the DELETE FROM statement

Fixed

• Fix the compatibility problem of the UNION statement
• Fix range calculation of Index Scan when Prepared Plan Cache is enabled
• Check the AUTO_INCREMENT column for the SHARD_ROW_ID_BITS statement
• Set PB code for builtinArithmeticDivideDecimalSig

Improved

• Refine the error message about Invalid default value
• Make the error log for WriteConflict more friendly
• Add the schema version to the log
• Support warnings when using Coprocessor streaming
• Add the DDL Callback log
• Do not log handshake error
• Log slow processing and waiting Coprocessor tasks separately with different labels
• Do not bind graceful shutdown to SIGTERM

Weekly update in TiSpark

Last week, we landed 4 PRs in the TiSpark repositories.

Fixed

• Fix the DateTime parse error when DateTime is in DST gap
• Fix the count(1) function used with the limit clause

Improved

• Make the tidbMapTable method return the corresponding DataFrame
• Improve the query plan test

Weekly update in TiKV and PD

Last week, we landed 35 PRs in the TiKV and PD repositories.

Added

• Use slog via the slog_stdlog crate
• Support compression in the gRPC layer

Fixed

• Fix the issue that split might cause dirty read in extreme conditions
• Correct the default value of the read thread pool configuration
• Fix load Region failure due to too large packet size
• Fix the issue that Learner cannot be successfully elected in special conditions

Improved

• Speed up decoding datum and table
• Speed up Deleting Range
• Update the gRPC version
• Make Label scheduler take care of unhealthy Regions
• Adjust timeout time for the operator which only contains TransferLeader
• Filter disconnected stores for leader transfer