rdblue 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_r315463525
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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",
Review comment:
Minor: This isn't quite correct. This doesn't guarantee that a file matches
the filter, just that it may contain data that matches the filter. For example,
if a table is bucketed by `id` and a file has ids `x` and `z` where `x < y` and
`y < z` and `x`, `y`, and `z` all hash to the same bucket, then `id = y` would
match the file even though `y` isn't actually in it.
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