aokolnychyi commented on a change in pull request #351: Extend Iceberg with a
way to overwrite files for eager updates/deletes
URL: https://github.com/apache/incubator-iceberg/pull/351#discussion_r317398659
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File path: core/src/main/java/org/apache/iceberg/OverwriteData.java
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@@ -88,6 +119,42 @@ public OverwriteFiles validateAddedFiles() {
}
}
+ if (conflictDetectionFilter != null) {
+ PartitionSpec spec = writeSpec();
+ Expression inclusiveExpr =
Projections.inclusive(spec).project(conflictDetectionFilter);
+ Evaluator inclusive = new Evaluator(spec.partitionType(), inclusiveExpr);
+
+ InclusiveMetricsEvaluator metrics = new
InclusiveMetricsEvaluator(base.schema(), conflictDetectionFilter);
+
+ List<DataFile> newFiles = collectNewFiles(base);
+ for (DataFile newFile : newFiles) {
+ ValidationException.check(
+ !inclusive.eval(newFile.partition()) || !metrics.eval(newFile),
+ "A conflicting file was appended that matches filter '%s': %s",
+ conflictDetectionFilter, newFile.path());
+ }
+ }
+
return super.apply(base);
}
+
+ private List<DataFile> collectNewFiles(TableMetadata meta) {
+ List<DataFile> newFiles = new ArrayList<>();
+
+ Long currentSnapshotId = meta.currentSnapshot() == null ? null :
meta.currentSnapshot().snapshotId();
Review comment:
Not sure I got. If the current snapshot is null, it means the table is still
empty and shouldn't have any new files, right?
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