## Proposed changes
Issue Number: close#35635
cherry-pick https://github.com/apache/doris/pull/35637 from master to
branch-2.1
<!--Describe your changes.-->
Cast rules：Consistent with mysql.
String：Date
The first part is 1-digit x: 000x-month-day
The first part is 2-digit xy: 20xy-month-day / 19xy-month-day The first
part is 3-digit xyz: 20xy-0z-day / 19xy-0z-day The first part is 4-digit
xyzw: xyzw-month-day
## Proposed changes
Issue Number: close #xxx
<!--Describe your changes.-->
pick https://github.com/apache/doris/pull/37062
1. revert https://github.com/apache/doris/pull/25097. we decide to rely
on OS. not maintain independent tzdata anymore to keep result
consistency
2. refactor timezone load. removed rwlock.
before:
```sql
mysql [optest]>select count(convert_tz(d, 'Asia/Shanghai', 'America/Los_Angeles')), count(convert_tz(dt, 'America/Los_Angeles', '+00:00')) from dates;
+-------------------------------------------------------------------------------------+--------------------------------------------------------+
| count(convert_tz(cast(d as DATETIMEV2(6)), 'Asia/Shanghai', 'America/Los_Angeles')) | count(convert_tz(dt, 'America/Los_Angeles', '+00:00')) |
+-------------------------------------------------------------------------------------+--------------------------------------------------------+
| 16000000 | 16000000 |
+-------------------------------------------------------------------------------------+--------------------------------------------------------+
1 row in set (6.88 sec)
```
now:
```sql
mysql [optest]>select count(convert_tz(d, 'Asia/Shanghai', 'America/Los_Angeles')), count(convert_tz(dt, 'America/Los_Angeles', '+00:00')) from dates;
+-------------------------------------------------------------------------------------+--------------------------------------------------------+
| count(convert_tz(cast(d as DATETIMEV2(6)), 'Asia/Shanghai', 'America/Los_Angeles')) | count(convert_tz(dt, 'America/Los_Angeles', '+00:00')) |
+-------------------------------------------------------------------------------------+--------------------------------------------------------+
| 16000000 | 16000000 |
+-------------------------------------------------------------------------------------+--------------------------------------------------------+
1 row in set (2.61 sec)
```
3. now don't support timezone offset format string like 'UTC+8', like we
already said in
https://doris.apache.org/docs/dev/query/query-variables/time-zone/#usage
4. support case-insensitive timezone parsing in nereids.
5. a bug when parse timezone using nereids. should check DST by input,
but wrongly by now before. now fixed.
doc pr: https://github.com/apache/doris-website/pull/810
All timestamp/datetime parsing in Doris is controlled by the session
variable `time_zone`.
Apply it also to interface of `TimeUtils` in FE.
pick https://github.com/apache/doris/pull/37465
Query following createting table would throw table not exist error.
For example.
t1: client issue create table to master fe
t2: client issue query sql to observer fe, the query would fail due to
not exist table in plan phase.
t3: observer fe receive editlog creating the table from the master fe
After the pr:
query at t2 would wait until latest edit log is received from master fe
in the observer fe.
pick #37593
## Proposed changes
Issue Number: close #xxx
<!--Describe your changes.-->
pick from #37235
the algorithm for computing stats for "expr1 and expr2" predicate is as
following:
1. compute output stats of expr1 based on input stats. the result stats
is denoted by leftStats
2. compute stats of expr2 based on leftStats after step1, leftStats
should be normalized to avoid abnormal cases, such as ndv > rowCount or
numNulls > rowCount
Issue Number: close #xxx
<!--Describe your changes.-->
## Proposed changes
Issue Number: close #xxx
<!--Describe your changes.-->
* When creating a backupJob with huge of tables in a database, it can
cause backupJob editlog size over 2GB and bdbje will throw exception
because of ByteBuffer overflow
## Proposed changes
Issue Number: close #xxx
<!--Describe your changes.-->
