https://github.com/apache/doris/pull/36497
before
```
mysql [test]>select count(ltrim(str,"1")) from stringDb2;
+------------------------+
| count(ltrim(str, '1')) |
+------------------------+
| 64000000 |
+------------------------+
1 row in set (7.79 sec)
```
now
```
mysql [test]>select count(ltrim(str,"1")) from stringDb2;
+------------------------+
| count(ltrim(str, '1')) |
+------------------------+
| 64000000 |
+------------------------+
1 row in set (0.73 sec)
```
## Proposed changes
Issue Number: close #xxx
<!--Describe your changes.-->
## Proposed changes
```
mysql [test]>set DEBUG_SKIP_FOLD_CONSTANT = true;
Query OK, 0 rows affected (0.00 sec)
mysql [test]>select cast(unix_timestamp("2024-01-01",'yyyy-MM-dd') as bigint);
+------------------------------------------------------------+
| cast(unix_timestamp('2024-01-01', 'yyyy-MM-dd') as BIGINT) |
+------------------------------------------------------------+
| 1704038400000000 |
+------------------------------------------------------------+
```
now
```
mysql [test]>select cast(unix_timestamp("2024-01-01",'yyyy-MM-dd') as bigint);
+------------------------------------------------------------+
| cast(unix_timestamp('2024-01-01', 'yyyy-MM-dd') as BIGINT) |
+------------------------------------------------------------+
| 1704038400 |
+------------------------------------------------------------+
1 row in set (0.01 sec)
```
The column does not have a scale set, but the cast uses the scale to
perform the cast.
<!--Describe your changes.-->
## Proposed changes
Issue Number: close #xxx
<!--Describe your changes.-->
this PR is from @sjyango work in #32326,
wants merge #32326 into master branch, but it's draft and not maintain long time. so have this new PR.
Co-authored-by: sjyango <sjyang2022@zju.edu.cn>
In this PR, we moved the BE code of hll scalar functions together to manage better, like bitmap functions file does.
Also, we optimized the head files by:
removing useless file "vec/aggregate_functions/aggregate_function.h" and "boost/iterator/iterator_facade.hpp",
using cstddef and cstdint instead of stddef.h and stdint.h.
Issue Number: #31320
Support two hll functions:
- hll_from_base64
Convert a base64 string(result of function hll_to_base64) into a hll.
- hll_to_base64
Convert an input hll to a base64 string.
in some case, we has code
```
if (_join_op == TJoinOp::RIGHT_OUTER_JOIN || _join_op == TJoinOp::FULL_OUTER_JOIN) {
_probe_column_convert_to_null = _convert_block_to_null(*input_block);
}
```
then do next function like cast , but in function cast we assume block column is same with from_type.which will make status error
