zhanglistar opened a new pull request, #11489:
URL: https://github.com/apache/incubator-gluten/pull/11489

   Align aggregate arrayFold argument types with lambda signatures, support 
finish lambdas, and add a nested-struct test covering null handling.
   
   ## What changes are proposed in this pull request?
   
   - Align sparkArrayFold accumulator/element argument types with merge lambda 
signatures in parser and execution.
   - Support finish lambdas in aggregate mapping.
   - Add a nested-struct aggregate test covering nulls and empty arrays.
   Fix issue https://github.com/apache/incubator-gluten/issues/11488.
   ## How was this patch tested?
   
   - GlutenFunctionValidateSuite: "array functions with lambda"


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