amorynan opened a new pull request, #24241:
URL: https://github.com/apache/doris/pull/24241
## Proposed changes
Issue Number: close #xxx
now we use cast to decimalv3 may has error , because decimalv3 use type
precision for translate string
```
mysql [test]>select cast("9999e-1" as decimal(2,1));
+------------------------------------+
| cast('9999e-1' as DECIMALV3(2, 1)) |
+------------------------------------+
| 999.9 |
+------------------------------------+
1 row in set (0.01 sec)
```
this pr will fix this just keep reaction same with mysql
```
mysql> select cast('9999e-1' as decimalv3(2, 1));
+------------------------------------+
| cast('9999e-1' as DECIMALV3(2, 1)) |
+------------------------------------+
| 9.9 |
+------------------------------------+
1 row in set (0.07 sec)
```
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