stevenzwu commented on code in PR #13720:
URL: https://github.com/apache/iceberg/pull/13720#discussion_r2292205167
##########
spark/v4.0/spark/src/main/java/org/apache/iceberg/spark/actions/RewriteTablePathSparkAction.java:
##########
@@ -281,24 +281,32 @@ private String rebuildMetadata() {
// rebuild version files
RewriteResult<Snapshot> rewriteVersionResult =
rewriteVersionFiles(endMetadata);
Set<Snapshot> deltaSnapshots = deltaSnapshots(startMetadata,
rewriteVersionResult.toRewrite());
-
- Set<String> manifestsToRewrite = manifestsToRewrite(deltaSnapshots,
startMetadata);
Set<Snapshot> validSnapshots =
Sets.difference(snapshotSet(endMetadata), snapshotSet(startMetadata));
+ // rebuild manifest files
+ Set<ManifestFile> manifestsToRewrite = manifestsToRewrite(validSnapshots);
Review Comment:
Here is where I am confused. Previously, `manifestsToRewrite` return
manifests who are added by the `deltaSnapshots`.
Is `deltaSnapshots` and `deltaSnapshots` same?
```
private Set<String> manifestsToRewrite(
Set<Snapshot> deltaSnapshots, TableMetadata startMetadata) {
try {
Table endStaticTable = newStaticTable(endVersionName, table.io());
Dataset<Row> lastVersionFiles =
manifestDS(endStaticTable).select("path");
if (startMetadata == null) {
return
Sets.newHashSet(lastVersionFiles.distinct().as(Encoders.STRING()).collectAsList());
} else {
Set<Long> deltaSnapshotIds =
deltaSnapshots.stream().map(Snapshot::snapshotId).collect(Collectors.toSet());
return Sets.newHashSet(
lastVersionFiles
.distinct()
.filter(
functions
.column(ManifestFile.SNAPSHOT_ID.name())
.isInCollection(deltaSnapshotIds))
.as(Encoders.STRING())
.collectAsList());
}
```
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