viirya commented on PR #52578:
URL: https://github.com/apache/spark/pull/52578#issuecomment-3609614987
> > Not sure why getting the conclusion. Why it must be fully or not at all?
I think it makes sense to partially push down.
>
> The API returns a boolean[], where each element indicates whether the
corresponding VariantProjection can be pushed down.
>
> VariantProjection is defined as:
>
> ```
> public final class VariantProjection {
> private final String[] columnName; // like column path to the actual
nested field in variant from root schema
> private final DataType expectedDataType;
> // ...
> }
> ```
Okay, it makes sense then. I thought you meant all variant accesses must be
pushed down fully or not at all.
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