0lai0 commented on PR #3746:
URL: 
https://github.com/apache/datafusion-comet/pull/3746#issuecomment-4105535276

   Thanks @andygrove for the review! All three comments have been addressed and 
also fixed the Spark 4.0 compilation failures. 
   The root cause was two removed APIs in Spark 4:
   - Column(Expression) constructor → replaced with getColumnFromExpression() 
shim
   - Column.expr property → replaced with UnresolvedAttribute to construct 
column references directly in test code
   
   Both Spark 3.5 (tests pass) and Spark 4.0 (compilation verified) are working 
in local.
   `./mvnw test -pl spark \
     -Dsuites="org.apache.comet.CometTemporalExpressionSuite" \
     -Dtest="none" -DfailIfNoTests=false
   `
   `./mvnw test-compile -Pspark-4.0
   `


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