eric-maynard commented on code in PR #1368:
URL: https://github.com/apache/polaris/pull/1368#discussion_r2043196115
##########
plugins/spark/v3.5/src/main/java/org/apache/polaris/spark/SparkCatalog.java:
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@@ -161,33 +163,59 @@ public Table createTable(
@Override
public Table alterTable(Identifier ident, TableChange... changes) throws
NoSuchTableException {
- throw new UnsupportedOperationException("alterTable");
+ try {
+ return this.icebergsSparkCatalog.alterTable(ident, changes);
+ } catch (NoSuchTableException e) {
+ Table table = this.polarisSparkCatalog.loadTable(ident);
+ String provider =
table.properties().get(PolarisCatalogUtils.TABLE_PROVIDER_KEY);
+ if (PolarisCatalogUtils.useDelta(provider)) {
+ // For delta table, most of the alter operations is a delta log
manipulation,
+ // we load the delta catalog to help handling the alter table
operation.
+ // NOTE: This currently doesn't work for changing file location and
file format
Review Comment:
If it doesn't work I think we should throw up an exception in these cases
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