DongLiang-0 opened a new pull request, #17:
URL: https://github.com/apache/doris-kafka-connector/pull/17

   I'm sorry for the schema change 
https://github.com/apache/doris-kafka-connector/pull/14  implemented before.
   
   The previous PR implementation method, due to the need to read the topic of 
a specific `schema.topic`, this implementation method may cause kafka-connect 
to read the data topic first instead of the `schema.topic` when starting up. In 
this case, under certain circumstances Will cause data in the imported change 
column to be missing.
   
   The current schema change is to parse the data column and compare it with 
the schema read from doris to determine whether it is missing to determine 
whether the column needs to be added.
   So we also exclude the `schema.topic` parameter,  if you want to use the 
schema change function, you need to set `schema.evolution` to `BASIC`. This 
parameter defaults to `NONE` and schema change is not supported.


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