silundong commented on PR #4267:
URL: https://github.com/apache/calcite/pull/4267#issuecomment-2774244088

   > I apologize because my comment was indeed ambiguous, what I meant was not 
to remove it from `CoreRules`, but to make sure the rule doesn't end up in one 
the sets of standard rules as defined in `RelOptRules`, this is not the case at 
the moment.
   > 
   > I think that a word of caution could be added as a comment in the javadoc 
of the rule itself, briefly describing known issues (what rules could be 
problematic when paired with this one, how to limit the danger via the bloat 
parameter, etc.), this will help users understanding the implications of adding 
this rule, especially in combination with some others known to cause infinite 
loops.
   > 
   > In the current javadoc, it is correctly suggested to use this rule before 
`CoreRules#FILTER_INTO_JOIN` and `CoreRules#JOIN_CONDITION_PUSH`, maybe we can 
be more explicit suggesting the use of the `HepPlanner` too?
   > 
   > It can help for discussions like [this 
one](https://lists.apache.org/thread/0yotdv62r6b3wg1qztftdpnkzpc4dvzv) in the 
mailing list to have better description of what rules to add and how they are 
expected to be used.
   
   No worries, thank you for your suggestions and comments. I responded to some 
of your comments that I think may be fine, and I will update the others and 
rule that Mihaibudiu hopes for in the next commit.


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