hsyuan commented on issue #1469: [CALCITE-3367] Add AntiJoinRule to convert 
project-filter-join-aggreg…
URL: https://github.com/apache/calcite/pull/1469#issuecomment-534835360
 
 
   > Also, because it projects fewer columns, it may match materialized views 
that an equivalent ordinary join would not.
   
   It is indeed true, inner/outer join in Calcite must output all the input 
columns instead of some.

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