pick from master #37889
we use unscaled value of BigDecimal in tablet prune. So we need to
ensure BigDecimal's precision and scale is same with the literal
contains it.
follow up #37090
support reuse sql cache when use variable as partition predicate and variable change:
```sql
set @dt='2024-07-16';
-- create cache 1
select * from tbl where dt = @dt;
set @dt='2024-07-17';
-- create cache 2, will not invalidate cache 1
select * from tbl where dt = @dt;
set @dt='2024-07-16';
-- reuse cache 1
select * from tbl where dt = @dt;
```
## 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.-->
