harshmotw-db opened a new pull request, #53164:
URL: https://github.com/apache/spark/pull/53164
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### What changes were proposed in this pull request?
This PR enables the annotation of the variant parquet logical type and
shredded writes and reads by default.
### Why are the changes needed?
1. Having variant data annotated with the variant logical type is required
by the parquet variant spec
([source](https://github.com/apache/parquet-format/blob/master/VariantEncoding.md#variant-in-parquet)).
This is necessary to adhere to the spec
2. Variant shredding brings in significant performance optimizations over
regular unshredded variants, and should be the default mode.
### Does this PR introduce _any_ user-facing change?
Yes, variant data written by Spark would be annotated with the variant
logical type annotation and variant shredding would be enabled by default.
### How was this patch tested?
Existing tests.
### Was this patch authored or co-authored using generative AI tooling?
No
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