Weekly update in TiDB

Last week, we landed 52 PRs in the TiDB repositories.

Added

• Support the window function syntax.

Fixed

• Fix an issue when the values builtin function meets the null value.
• Support the signed field option for the numeric type.
• Fix an issue of index reader.
• Fix an issue that the binlog client is not initialized correctly.
• Correct the schema type of ShowStmt.
• The default value length for Join should be changed for column pruning.
• Add retry for dialPumpClient.
• Parse but ignore the REPLICATION CLIENT/SLAVE, USAGE privileges in the GRANT statement.
• Fix an issue with visibility check.
• Fix an issue with renaming tables.
• Parse PARTITION BY RANGE COLUMNS.
• Support the straight_join syntax.
• Support the row_count built-in function.
• Load the column histograms as needed.
• Start safePointChecker before running a worker.
• Truncate the information field for show processlist and support show full processlist.

Improved

• Build the prepared statement plan in the Optimization phase.
• Support the ALTER TABLE t ENGINE = 'string' syntax.
• Remove reorgTableDeleteLimit.
• Fold the true item in the CNF predicator.
• Use max uint64 as the start timestamp for the ANALYZE statement .
• Improve merge join to support all join types.
• Add highlight to log.
• Add the Row interface.
• Simple improvement for range calculation for Primary Key.
• Change the behavior of the the in function.
• Support a plan cache for prepared statements.
• Introduce Chunk to replace the current datum slice Row.
• Introducing OpenTracing into TiDB:
  • For two phase commit.
  • Tracing config and gRPC interceptor middleware.

Weekly update in TiSpark

Added

• Add redundant aggregation elimination.

Fixed

• Fix meta deserialize overflow.
• Fix broken integration test.
• Fix potential time type NPE.
• Fix and upgrade Bazel for CI.
• Fix test dependency in CI.

New Contributor

• Ry

Weekly update in TiKV

Last week, We landed 21 PRs in the TiKV repositories.

Added

• Add adjacent region balancing scheduler.
• Add WAL bytes per the sync configuration.
• Flow control based on total writing bytes.
• Implement the in function for coprocessor.
• Filter the stores with lots of pending peers when balancing.
• Add region and hot region scheduling API.
• Record the approximate size of a store in PD.

Fixed

• raftstore: fix an issue with stale peer check.
• Record snapshot metrics in SCHED_STAGE_COUNTER_VEC.
• Fix the illegal JSON format in the hotspot/stores API.

Improved

• Inline get_limit_at_size.
• Group the metrics by namespaces.
• Document defer macro LIFO behavior.
• Remove redundant verbose KV for coordinator.
• Adjust table ID calculation.
• Set stack size to 10 MB for the coprocessor threads.

New contributor

• odeits