belugabehr edited a comment on pull request #1118:
URL: https://github.com/apache/hive/pull/1118#issuecomment-656722071


   
   > Foreign Keys
   > 
   > So we now have given the datastore control over the cascade deletion 
strategy for objects stored in these tables. Please be aware that JDO provides 
Dependent Fields as a way of allowing cascade deletion. The difference here is 
that Dependent Fields is controlled by DataNucleus, whereas foreign key delete 
actions are controlled by the datastore (assuming the datastore supports it 
even)
   ```
   
   http://www.datanucleus.org/products/accessplatform/jdo/mapping.html#fk


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