czzmmc opened a new issue, #18776:
URL: https://github.com/apache/doris/issues/18776

   ### Search before asking
   
   - [X] I had searched in the 
[issues](https://github.com/apache/doris/issues?q=is%3Aissue) and found no 
similar issues.
   
   
   ### Description
   
   Optimizer hint is powerful in many uses. I see doris has the function in 
query statement. But doris does not support optimizer hint in insert statement.
   When I try this sql (insert /*+ 
SET_VAR(parallel_fragment_exec_instance_num=16)*/ into 
r_1y5000w_c_500_t_32_not_key(ID,f500) SELECT ID,IF(f5='1', '1', '2') FROM 
r_1y5000w_c_500_t_32_not_key;), I get this error.
   ```
   mysql> insert /*+ SET_VAR(parallel_fragment_exec_instance_num=16)*/ into 
r_1y5000w_c_500_t_32_not_key(ID,f500) SELECT ID,IF(f5='1', '1', '2') FROM 
r_1y5000w_c_500_t_32_not_key;
   ERROR 1105 (HY000): NullPointerException, msg: null
   ``` 
   
   ### Use case
   
   None
   
   ### Related issues
   
   None
   
   ### Are you willing to submit PR?
   
   - [ ] Yes I am willing to submit a PR!
   
   ### Code of Conduct
   
   - [X] I agree to follow this project's [Code of 
Conduct](https://www.apache.org/foundation/policies/conduct)
   


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