scovich commented on code in PR #8379:
URL: https://github.com/apache/arrow-rs/pull/8379#discussion_r2368042262
##########
parquet-variant-compute/src/variant_get.rs:
##########
@@ -1138,6 +1158,53 @@ mod test {
)
}
+ /// Return a VariantArray that represents a partially "shredded" variant
for Date32
+ fn partially_shredded_date32_variant_array() -> ArrayRef {
+ let (metadata, string_value) = {
+ let mut builder = parquet_variant::VariantBuilder::new();
+ builder.append_value("n/a");
+ builder.finish()
+ };
+
+ // Create the null buffer for the overall array
+ let nulls = NullBuffer::from(vec![
+ true, // row 0 non null
+ false, // row 1 is null
+ true, // row 2 non null
+ true, // row 3 non null
+ ]);
+
+ // metadata is the same for all rows
+ let metadata =
BinaryViewArray::from_iter_values(std::iter::repeat_n(&metadata, 4));
+
+ // See
https://docs.google.com/document/d/1pw0AWoMQY3SjD7R4LgbPvMjG_xSCtXp3rZHkVp9jpZ4/edit?disco=AAABml8WQrY
+ // about why row1 is an empty but non null, value.
+ let values = BinaryViewArray::from(vec![
+ None, // row 0 is shredded, so no value
+ Some(b"" as &[u8]), // row 1 is null, so empty value
+ Some(&string_value), // copy the string value "N/A"
+ None, // row 3 is shredded, so no value
+ ]);
+
+ let typed_value = Date32Array::from(vec![
+ Some(20348), // row 0 is shredded, 2025-09-17
+ None, // row 1 is null
+ None, // row 2 is a string, not a date
+ Some(20340), // row 3 is shredded, 2025-09-09
+ ]);
+
+ let struct_array = StructArrayBuilder::new()
+ .with_field("metadata", Arc::new(metadata), true)
Review Comment:
`metadata` is non-nullable...
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