szehon-ho commented on code in PR #4662:
URL: https://github.com/apache/iceberg/pull/4662#discussion_r873997931
##########
core/src/main/java/org/apache/iceberg/BaseUpdatePartitionSpec.java:
##########
@@ -103,7 +103,29 @@ class BaseUpdatePartitionSpec implements
UpdatePartitionSpec {
this.lastAssignedPartitionId = lastAssignedPartitionId;
}
- private int assignFieldId() {
+ /**
+ * Calculates a field ID to the newly added PartitionField.
+ * New field ID is assigned in every case for V1 tables, but for V2 we try
to recycle a former ID if possible.
+ * @param sourceTransform - pair of source ID and transform for this
PartitionField addition
+ * @return - the calculated field ID
+ */
+ private int assignFieldId(Pair<Integer, Transform<?, ?>> sourceTransform) {
+ if (formatVersion == 2 && base != null) {
+ int sourceId = sourceTransform.first();
+ Transform<?, ?> transform = sourceTransform.second();
+
+ Set<PartitionField> allHistoricalFields = Sets.newHashSet();
+ for (PartitionSpec partitionSpecpec : base.specs()) {
Review Comment:
Typo 'partitionSpecpec'
##########
core/src/main/java/org/apache/iceberg/BaseUpdatePartitionSpec.java:
##########
@@ -103,7 +103,29 @@ class BaseUpdatePartitionSpec implements
UpdatePartitionSpec {
this.lastAssignedPartitionId = lastAssignedPartitionId;
}
- private int assignFieldId() {
+ /**
+ * Calculates a field ID to the newly added PartitionField.
+ * New field ID is assigned in every case for V1 tables, but for V2 we try
to recycle a former ID if possible.
+ * @param sourceTransform - pair of source ID and transform for this
PartitionField addition
Review Comment:
Nit: I don't see many method with '-', maybe we can remove it.
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