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  • Mon, Oct 22, 2018

Weekly update in TiDB

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

Added

  • Add the slow log for the Commit statement
  • Support cross-domain requests in the HTTP API
  • Add the PreAlloc4Row and Insert functions for Chunk and List
  • Implement Operand and Pattern of the cascades planner
  • Add the TiDB version to DDL metrics
  • Add a session variable to make Insert compatible with MySQL
  • Add the json_keys built-in function
  • Add an EXPLAIN test for partition pruning

Improved

  • Improve the MySQL compatibility by adding the USAGE privilege for the showGrants statement
  • Log more information when OtherError occurs in coprocessor
  • Update the Delta information for the partitioned table in statistics
  • Limit the length of sample values in statistics
  • Refine ColumnPrune for LogicalUnionAll
  • Eliminate if null on the non-null column when building Projection
  • Support Group and GroupExpr for the cascades planner
  • Eliminate projection after aggregation pruning
  • Handle the DDL event for the partitioned table in statistics
  • Refine Explain Analyze
  • Remove the kv.BypassLatch option and enable the latch scheduler by default
  • Refine the error log when the DDL job is canceled
  • Improve the MySQL compatibility for the current_user() built-in function
  • Propagate constants over outer join
  • Support changing null to not null in the alter table statement

Fixed

  • Fix an invalid DDL job which makes TiDB panic
  • Fix a panic in limit N when N is too large and overflows an integer
  • Fix a bug in point get
  • Fix date time parsing for the YYYY-MM-DD HH format
  • Maintain DeferredExpr in aggressive constant folding
  • Fix a panic caused by the empty histogram in statistics
  • Fix a panic caused by the empty schema of LogicalTableDual
  • Fix data race when initializing the systemTZ variable
  • Fix the admin check table bug of byte comparing
  • Add the check in DDL when creating a table with a foreign key
  • Fix the histogram boundaries overflow error in statistics
  • Convert DataSource to TableDual only when the empty range is not derived from parameterized constants

Weekly update in TiSpark

Last week, we landed 2 PRs in the TiSpark repository.

Fixed

  • Fix a bug in pyspark in Spark 2.3 that does not initialize a session correctly

Weekly update in TiKV and PD

Last week, we landed 16 PRs in the TiKV and PD repositories.

Added

  • Support more functions in Coprocessor:

    • Exp
    • Radians
  • Add the version information for tikv-ctl

  • Add tikv raftstore event duration to metrics

Fixed

  • Fix the cluster test of PD
  • Fix the building failure on Mac OS X
  • Fix WaitGroup data race

Improved

  • Remove the PD source code and build binary from the docker image
  • Update pd-ctl commands health and topsize
  • Release TiKV v2.0.8
  • Use the implicit project layout
  • Export ThreadCollector to use it later
  • Introduce eval_func and eval_func_with helper
  • Extract panic_hook
  • Use go mod to manage dependency

New contributor (Thanks!)

tidb: tianjiqx

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