zclllyybb opened a new pull request, #38543:
URL: https://github.com/apache/doris/pull/38543

   ## Proposed changes
   
   Issue Number: close #xxx
   
   1.  add algorithm record in `VSORT`'s explain string:
   
   before:
   ```sql
   |   1:VSORT(101)                 |
   |   |  order by: xxx             |
   |   |  offset: 0                 |
   |   |  distribute expr lists:    |
   |   |  tuple ids: 2              |
   ```
   after:
   ```sql
   |   1:VSORT(101)                 |
   |   |  order by: xxx             |
   |   |  algorithm: full sort      |
   |   |  offset: 0                 |
   |   |  distribute expr lists:    |
   |   |  tuple ids: 2              |
   ```
   2. add a new parameter to make `Block::dump_data()` could work when the 
nullity of the type of data is different from that of column. it's useful when 
in some function call under `default_implementation_for_nulls()`
   
   


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