Weekly update in TiDB

Last week, we landed 57 PRs in the TiDB repositories.

Added

• Add the version information in diagnostic messages.
• Add the Close() method to RawKVClient.
• Add JSON in fieldTypeMergeRules.
• Add support to MySQL connector 6.06.
• Add Git branch name in tidb_version() and the starting log.
• Add the auto analyze feature for tables.

Fixed

• DDL uses the correct method to check whether the context is done.
• Close the PD client in TiKV store and raw KV to prevent connection leak.
• Restore WrapCastAsReal and WrapCastAsDecimal if the argument is ClassInt.
• Notify the fetching goroutines to exit when IndexLookupExecutor closes.
• Fix the error in the return type for the ceil/floor function.
• Start GCWorker after the bootstrapping is finished.
• Add a limit to the number of multi-column index key parts.
• Disable the mysql.ClientMultiStatements capability
• Allow username to contain ‘@'.

Improved

• Handle canceled error by Grpc remote.
• Remove all the stuff about the backgroud DDL worker.
• Use more effective terror comparison method.
• Union scan reuses PK when it is a handle.
• Use FieldType.Decimal to control the decimal length of double values to be shown in client.
• Support time constant pushdown in mocktikv.
• Return the unsupported error in the type infer stage.
• Refactor the following expression/builtin-function evaluation framework:
  • CRC32
  • TIME
  • HOUR, MINUTE, SECOND, MICROSECOND
  • RAND, POW, SIGN, SQRT
  • DIV
  • TRUNCATE
  • ANY_VALUE
  • DNF
  • NULLIF
  • TIMESTAMPADD
  • TO_SECONDS
  • TO_DAYS
  • CASE
  • RADIANS
  • OCT
  • IS_IPV4, IS_IPV6, IS_IPV4_COMPAT, IS_IPV4_MAPP
  • INET_ATON, INET_NTOA, INET6_ATON, INET6_NTOA
  • TIME_FORMAT

Weekly update in TiKV

Last week, We landed 33 PRs in the TiKV repositories.

Added

• Add hex/escaped converting for tikv-ctl.
• Implement the basic structure of builtin_cast and some functions for DAG.
• Add compare to new expression calculate framework.
• Support leader resignation for PD.
• Add Git branch information to the starting log.
• Support the mysql-time constant.
• Add Constant and Column for coprocessor.
• Add RocksDB event metrics.

Fixed

• Declare config for each CF explicitly.
• Use millisecond resolution for the coarse Instant.
• Only collect properties for DBEntryType::Put.
• Allow coarse error.

Improved

• Check approximate size before split check.
• Get snapshot in batches for coprocessor.
• Get snapshot in batches for endpoint.
• Use separated thread to flush metrics.
• Use histogram coarse timer.
• Upgrade Rocksdb to 5.6.2.
• Deprecate v1 snapshot.
• Reorganize the server start up process for PD.
• Broadcast when there is pending conf change.