yashmayya commented on PR #13618:
URL: https://github.com/apache/pinot/pull/13618#issuecomment-2230469468

   > As defined in [SqlOperator Calcite 
javadoc](https://calcite.apache.org/javadocAggregate/org/apache/calcite/sql/SqlOperator.html#isDeterministic()),
 a function is deterministic if and only if
   > 
   > > Returns whether a call to this operator is guaranteed to always return 
the same result given the same operands; true is assumed by default.
   > 
   > Which is not true in the case of `ARRAY_TO_MV`
   
   Technically, `ARRAY_TO_MV` _is_ deterministic right since it is guaranteed 
to always return the same result given the same operands? Essentially, we're 
never going to get a different result for something like 
`ARRAY_TO_MV(RandomAirports) = 'MFR'` when applied to the same row. Although 
this does seem to fix the issue described in 
https://github.com/apache/pinot/issues/13595, so as long as there are no other 
side effects, I guess we could live with this (especially considering that the 
`ARRAY_TO_MV` function itself is a bit of a hack).


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