jinxing64 commented on issue #1717: [CALCITE-3667] EnumerableMergeJoin should 
not use take-while enumerat…
URL: https://github.com/apache/calcite/pull/1717#issuecomment-570440080
 
 
   Hi @vlsi 
   Thanks a lot for comment ~
   
   1. Yes, the implementation is similar to `mergeJoin(...).where(...)`,  the 
output of of `mergeJoin` is `Enumerator<TResult>`, it's hard to filter values 
with predicate of `Predicate2<TSource, TInner>`. That's why I implement the 
filtering inside of `MergeJoinEnumerator`
   
   2. For backword compatibility, shall we keep the old method of `mergeJoin` 
with a default `predicate`  ?
   
   How do you think ?

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