dttung2905 commented on code in PR #158:
URL:
https://github.com/apache/terraform-provider-iceberg/pull/158#discussion_r4485452764
##########
internal/provider/table_schema.go:
##########
@@ -321,6 +326,71 @@ func validateSchemaEvolution(current, planned
*iceberg.Schema) error {
return nil
}
+// validateFieldIDParents rejects a field ID that exists in both schemas under
+// different parents. Iceberg field IDs are identities: moving id 3 from struct
+// "left" to struct "right" (or between list/map containers) silently changes
+// what that ID means. iceberg.IndexParents omits table-root fields, so those
+// are stored as table.TableRootID to catch root↔nested moves too.
+func validateFieldIDParents(current, planned *iceberg.Schema, currentByID,
plannedByID map[int]iceberg.NestedField) error {
+ currentParents, err := fieldParentIDs(current, currentByID)
+ if err != nil {
+ return err
+ }
+ plannedParents, err := fieldParentIDs(planned, plannedByID)
+ if err != nil {
+ return err
+ }
+
+ ids := make([]int, 0, len(currentParents))
+ for id := range currentParents {
+ ids = append(ids, id)
+ }
+ slices.Sort(ids)
+
+ for _, id := range ids {
+ plannedParent, ok := plannedParents[id]
+ if !ok {
+ continue
+ }
+ currentParent := currentParents[id]
+ if currentParent == plannedParent {
+ continue
+ }
+
+ return fmt.Errorf("field %q (id %d): cannot move from parent %s
to parent %s; field ids cannot change parent",
Review Comment:
Thanks alot for the review. I have fixed both of your comments :bow:
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