rdblue commented on a change in pull request #2164:
URL: https://github.com/apache/iceberg/pull/2164#discussion_r565682699
##########
File path: api/src/main/java/org/apache/iceberg/SortOrder.java
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@@ -258,14 +257,20 @@ Builder addSortField(String transformAsString, int
sourceId, SortDirection direc
}
public SortOrder build() {
- if (orderId == 0 && fields.size() != 0) {
- throw new IllegalArgumentException("Sort order ID 0 is reserved for
unsorted order");
+ if (fields.isEmpty()) {
+ if (orderId != null && orderId != 0) {
+ throw new IllegalArgumentException("Unsorted order ID must be 0");
+ }
+ return SortOrder.unsorted();
}
- if (fields.size() == 0 && orderId != 0) {
- throw new IllegalArgumentException("Unsorted order ID must be 0");
+
+ if (orderId != null && orderId == 0) {
Review comment:
If `orderId == 0`, then it can't be null, so the null check is redundant.
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