friendlymatthew commented on code in PR #18718:
URL: https://github.com/apache/datafusion/pull/18718#discussion_r2529239697
##########
datafusion/common/src/hash_utils.rs:
##########
@@ -329,6 +329,40 @@ where
Ok(())
}
+#[cfg(not(feature = "force_hash_collisions"))]
+fn hash_union_array(
+ array: &UnionArray,
+ random_state: &RandomState,
+ hashes_buffer: &mut [u64],
+) -> Result<()> {
+ let DataType::Union(union_fields, _mode) = array.data_type() else {
+ unreachable!()
+ };
+
+ let mut child_hashes = vec![None; 128];
Review Comment:
Scratch that. I'll use a hashmap
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