RussellSpitzer commented on code in PR #12840:
URL: https://github.com/apache/iceberg/pull/12840#discussion_r2054852179
##########
spark/v3.5/spark/src/main/java/org/apache/iceberg/spark/actions/RewriteManifestsSparkAction.java:
##########
@@ -161,6 +169,29 @@ public RewriteManifestsSparkAction stagingLocation(String
newStagingLocation) {
return this;
}
+ @Override
+ public RewriteManifestsSparkAction clusterBy(List<String> partitionFields) {
+ // Collect set of available partition columns to cluster on
+ Set<String> availablePartitionNames =
+
spec.fields().stream().map(PartitionField::name).collect(Collectors.toSet());
+
+ // Identify specified partition fields that are not available in the spec
+ List<String> missingFields =
+ partitionFields.stream()
+ .filter(field -> !availablePartitionNames.contains(field))
+ .collect(Collectors.toList());
+
+ // Check if these partition fields are included in the spec
+ Preconditions.checkArgument(
+ missingFields.isEmpty(),
+ "Cannot set manifest clustering because specified field(s) %s were not
found in current partition spec %s.",
+ missingFields,
+ this.spec.specId());
Review Comment:
probably want to display the spec here instead of the id
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