variables: add constraints on tidb_super_read_only when tidb_restrict…

…ed_read_only is turned on (pingcap#31746) (pingcap#31842)

close pingcap#31745

expression: fix date format identifies '\n' as invalid separator (pin…

…gcap#32… (pingcap#32391)

* expression: fix date format identifies '\n' as invalid separator (pingcap#32358)

*: add pushdown for ShowStmt and implement for show columns (pingcap#…

…31742) (pingcap#31866)

* cherry pick pingcap#31742 to release-5.4

Signed-off-by: ti-srebot <ti-srebot@pingcap.com>

statistics: change default value of tidb_analyze_version to 1 (pingca…

…p#31826)

close pingcap#31748

*: fix weak consistency not work (pingcap#31935) (pingcap#31949)

close pingcap#31933

planner: ignore close-stmt to make more queries can hit plan cache (p…

…ingcap#31687)

* planner: ignore close-stmt to make more queries can hit plan cache (pingcap#31653)

add prepare log (pingcap#31663)

* add prepare log


Co-authored-by: zhouqiang <zhouqiang.cl@gmail.com>

lightning: add more retryable error type (pingcap#31484)

close pingcap#31376