danielcweeks commented on code in PR #12651:
URL: https://github.com/apache/iceberg/pull/12651#discussion_r2025570136
##########
api/src/main/java/org/apache/iceberg/PartitionSpec.java:
##########
@@ -265,6 +265,22 @@ public boolean equals(Object other) {
return Arrays.equals(fields, that.fields);
}
+ public boolean equalOrFinerThan(PartitionSpec that) {
+ if (this.fields.length < that.fields.length) {
+ return false;
+ }
+
+ for (int i = 0; i < that.fields.length; i++) {
+ if (this.fields[i].sourceId() != that.fields[i].sourceId()) {
Review Comment:
I think we're making an incorrect assumption here about field ordering. I
can have the following specs:
```java
spec 1: identity(f1), identity(f2)
spec 2: identify(f2), identity(f1), identity(f3)
```
Which are both valid specs for the same schema and would fail in this
scenario where spec 2 is finer than spec 1.
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