Weekly update in TiDB

Last week, we landed 51 PRs in the TiDB repositories.

Added

• Provide the command option and log the success/fail information for slow-query.

Removed

• Remove the old planner.
• Remove xeval.
• Remove the localstore storage engine.

Fixed

• Change the selection plan to dual plan directly if the condition is always false.
• Insert column char(4) with latin1 charset by incorrect padding.
• Remove the check of initialized auto ID.
• Support alter table add column(...).
• Fix a bug in JSON decoding.
• Use utf8_bin for unsupported column collation.
• Fix the bug of alter table table_options, other_alter_specification.

Improved

• Move the safepoint checker to tikvStore.
• Enable pushing float down to TiKV.
• Fix estimation in index point query.
• No longer add enforcer.
• Improve index join to support all join types.
• Extract the process of getting full CMP type to method.
• Opentracing for Execute, ParseSQL, Compile, and runStmt.
• Reduce growslice in dumpRowValuesBinary.

New Contributor (Thanks!)

• wudi

Weekly update in TiKV

Last week, We landed 16 PRs in the TiKV repositories.

Added

• Add recursion limit check for coprocessor.
• Reset the RocksDB statistics periodically.

Fixed

• Save the region meta information to cache even if it is failed to be written to the disk.
• Fix the read statistics.
• Clear the hot store related gauges when store is not hot any more.
• Fix the LIKE behavior.

Improved

• Move operator influence into ShouldBalance.
• Reduce allocation.
• Remove the pending peer before adding a new peer.
• Refactor the split check.
• Add limitation for key size.

New Contributor (Thanks!)

• wudi