JNSimba commented on pull request #7210:
URL: https://github.com/apache/incubator-doris/pull/7210#issuecomment-989727488


   > > 3. Batch delete: `merge_type: DELETE` is a good method for delete. If 
there are two records in a batch : one is delete and the other is append, 
`merge_type: MERGE` can solve ,  maybe is there a better method?
   > 
   > @aihai Hello, I have an idea. You don't need to add `delete/merge` in the 
header. You can directly determine the delete event during streamload. Add 
`__DORIS_DELETE_SIGN__ =1` to the data and column to achieve the delete effect.
   > 
   > for example: `curl -v --location-trusted -u root:123456 -H "format: json" 
-H "strip_outer_array: true" -H "jsonpaths: [\"$.id\", \"$.name\",\ 
"$.__DORIS_DELETE_SIGN__\"]" -H "columns: id,name,__DORIS_DELETE_SIGN__" -T 
example.json http://127.0.0.1:8030/api/test/test_delete/_stream_load`
   
   And even when the table does not open batch delete, the program will 
automatically default to insert operation.


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