driftx commented on code in PR #4439:
URL: https://github.com/apache/cassandra/pull/4439#discussion_r2470419601
##########
src/java/org/apache/cassandra/db/marshal/BytesType.java:
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@@ -90,8 +90,9 @@ public boolean isCompatibleWith(AbstractType<?> previous)
@Override
public boolean isValueCompatibleWithInternal(AbstractType<?> otherType)
{
- // BytesType can read anything
- return true;
+ // BytesType should only be compatible with simple scalar types, not
with collections or UDTs
+ // because converting a collection or UDT to raw bytes is nonsensical
+ return !otherType.isMultiCell();
Review Comment:
Yes and we shouldn't do this in `isValueCompatibleWithInternal` since it
will prevent CASTing to bytes.
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