superserious-dev commented on code in PR #8073:
URL: https://github.com/apache/arrow-rs/pull/8073#discussion_r2258483206
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parquet-variant-compute/src/cast_to_variant.rs:
##########
@@ -39,6 +40,22 @@ macro_rules! primitive_conversion {
}};
}
+/// Convert the input array to a `VariantArray` row by row,
+/// transforming each element with `cast_fn`
+macro_rules! cast_conversion {
Review Comment:
This macro applies `cast_fn` to each element before converting it to a
Variant. Some of the remaining types will require casting before being accepted
by `Variant::from`.
We could also add the `cast_fn` argument to `primitive_conversion!` macro
and not add this macro. It would require passing something like `|v| v` (ie. a
no-op function) to the existing primitive conversions that don't require casts.
##########
parquet-variant-compute/Cargo.toml:
##########
@@ -33,6 +33,7 @@ rust-version = { workspace = true }
[dependencies]
arrow = { workspace = true }
arrow-schema = { workspace = true }
+half = { version = "2.1", default-features = false }
Review Comment:
Needed to reference `f16` in the code and in the tests.
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