metrics: update the PD role expr in Overview Grafana (pingcap#23863) (p…

…ingcap#23875)

executor: fix wrong key range of index scan when filter is comparing …

…year column with NULL (pingcap#23079) (pingcap#23104)

planner: fix {index,hash,merge} join on range suffix condition cluste…

…red index (pingcap#23294) (pingcap#23356)

planner, executor: reset NotNullFlag when merge schema for join (ping…

…cap#22955) (pingcap#22958)

session: fix the duplicate binding case when updating bind info (ping…

…cap#22367) (pingcap#22368)

Signed-off-by: ti-srebot <[email protected]>

store/tikv: fix a concurrency bug that may cause the batchClient time…

…out (pingcap#22239) (pingcap#22337)

Signed-off-by: ti-srebot <[email protected]>

planner: the issue that incorrect result is returned for indeterminis…

…tic function when executing a prepared point-get update. (pingcap#21883)

txn: fix the resolved txn status cache for pessimistic txn(pingcap#21689

) (pingcap#21706)

planner: disable index merge join temporarily (pingcap#20599)