feat: Add customizable post processor to hive columns #15372
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…tor#15372) Summary: In some ML use cases, we need to normalize the flatmap data using some customized logic on the output data from Hive connector. Add a configuration point to `HiveColumnHandle` for this purpose, and add `LazyVector::chain` to preserve the laziness while applying the transformation on data. Reviewed By: xiaoxmeng Differential Revision: D86102068
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Summary:
In some ML use cases, we need to normalize the flatmap data using some
customized logic on the output data from Hive connector. Add a configuration
point to
HiveColumnHandlefor this purpose, and addLazyVector::chaintopreserve the laziness while applying the transformation on data.
Differential Revision: D86102068