taoran92 commented on PR #4422:
URL: https://github.com/apache/flink-cdc/pull/4422#issuecomment-5250537834

   Thanks for reviewing. @leonardBang @loserwang1024 @ruanhang1993 
   
   I have introduced a bounded CachedTableFilter in flink-connector-debezium 
and use it as the default relational table filter. 
       
   For withAdditionalFilter() , it combines the raw Debezium delegate with the 
additional exclude rule and creates a single new cache. It first copies the raw 
delegate to a local variable, so the lambda does not capture or retain the 
previous CachedTableFilter and its cache. So the old cache can be GC. cc 
@ruanhang1993 
   
   All tests passed. PTAL, thanks.


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