aokolnychyi commented on a change in pull request #675: Inherit snapshot ids
for manifest entries
URL: https://github.com/apache/incubator-iceberg/pull/675#discussion_r371886150
##########
File path: core/src/main/java/org/apache/iceberg/MergingSnapshotProducer.java
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@@ -203,17 +211,29 @@ protected void add(DataFile file) {
* Add all files in a manifest to the new snapshot.
*/
protected void add(ManifestFile manifest) {
- // the manifest must be rewritten with this update's snapshot ID
- try (ManifestReader reader = ManifestReader.read(
- ops.io().newInputFile(manifest.path()), ops.current().specsById())) {
- ManifestFile manifestFile = ManifestWriter.copyAppendManifest(
- reader, manifestPath(manifestCount.getAndIncrement()), snapshotId(),
appendedManifestsSummary);
- appendManifests.add(manifestFile);
- // keep reference of the first appended manifest, so that we can avoid
merging first bin(s)
- // which has the first appended manifest and have not crossed the limit
of minManifestsCountToMerge
- if (firstAppendedManifest == null) {
- firstAppendedManifest = manifestFile;
- }
+ ManifestFile appendedManifest;
+ if (snapshotIdInheritanceEnabled && manifest.snapshotId() == null) {
+ appendedManifestsSummary.addedManifest(manifest);
+ appendManifests.add(manifest);
+ appendedManifest = manifest;
+ } else {
+ // the manifest must be rewritten with this update's snapshot ID
+ ManifestFile copiedManifest = copyManifest(manifest);
+ rewrittenAppendManifests.add(copiedManifest);
+ appendedManifest = copiedManifest;
+ }
+
+ // keep reference of the first appended manifest, so that we can avoid
merging first bin(s)
Review comment:
I'll need to double check this logic after I introduced separate lists for
rewritten manifests.
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