peterxcli opened a new pull request, #5133:
URL: https://github.com/apache/datafusion-comet/pull/5133

   ## Which issue does this PR close?
   
   Closes #5058.
   
   ## Rationale for this change
   
   `CalendarIntervalType` is supported as Arrow `Interval(MonthDayNano)`, but 
the native planner did not construct a null scalar for that type. As a result, 
null calendar interval literals passed the JVM support check and then failed 
during native planning.
   
   ## What changes are included in this PR?
   
   Map null `Interval(MonthDayNano)` literals to 
`ScalarValue::IntervalMonthDayNano(None)` in the native planner.
   
   ## How are these changes tested?
   
   The existing `calendar_interval.sql` fixture covers `CAST(NULL AS INTERVAL)` 
and requires native execution.
   
   - `cargo fmt --manifest-path native/Cargo.toml --all --check`
   - `make core`
   - `./mvnw test -Dtest=none -Dsuites="org.apache.comet.CometSqlFileTestSuite 
calendar_interval" -Dscalastyle.skip=true` with JDK 17 (1 test passed)
   


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