zabetak opened a new pull request, #4591:
URL: https://github.com/apache/calcite/pull/4591

   In terms of performance, the usage of `isDeterministic` method increases the 
complexity of the decision (to convert to SEARCH) from O(1) to O(n) where n the 
number of nodes in the `left`/`right` RexNode tree. Still we only hit this code 
path for few operators (comparisons) so in most common cases the left/right 
expression tree should be rather simple and small. 


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