cshuo commented on code in PR #19205:
URL: https://github.com/apache/hudi/pull/19205#discussion_r3643626290
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hudi-client/hudi-spark-client/src/main/java/org/apache/hudi/io/storage/row/HoodieRowCreateHandle.java:
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@@ -158,10 +159,45 @@ public HoodieRowCreateHandle(HoodieTable table,
* @throws IOException
*/
public void write(InternalRow row) throws IOException {
- if (populateMetaFields) {
- writeRow(row);
- } else {
- writeRowNoMetaFields(row);
+ switch (metaFieldsMode) {
+ case ALL:
+ writeRow(row);
+ break;
+ case NONE:
+ writeRowNoMetaFields(row);
+ break;
+ default:
+ writeRowSelectiveMetaFields(row);
+ break;
+ }
+ }
+
+ /**
+ * Selective meta-field write path: populate only the meta columns opted in
via
+ * {@code hoodie.meta.fields.mode} — {@code _hoodie_commit_time} and/or
{@code _hoodie_file_name}.
+ * The other meta columns stay null on disk. Record key is never populated
in this path, so the
+ * record key is not registered with the write support (bloom filter / RLI
hooks are meaningless
+ * without the record-key column).
+ */
+ private void writeRowSelectiveMetaFields(InternalRow row) {
+ try {
+ UTF8String[] metaFields = new UTF8String[5];
+ if (metaFieldsMode.isCommitTimePopulated()) {
+ metaFields[HoodieRecord.COMMIT_TIME_METADATA_FIELD_ORD] =
shouldPreserveHoodieMetadata
+ ? row.getUTF8String(HoodieRecord.COMMIT_TIME_METADATA_FIELD_ORD) :
commitTime;
+ }
+ if (metaFieldsMode.isFileNamePopulated()) {
+ metaFields[HoodieRecord.FILENAME_META_FIELD_ORD] =
shouldPreserveHoodieMetadata
Review Comment:
Clustering defaults shouldPreserveHoodieMetadata to true, so this copies
_hoodie_file_name from the source row into the newly created clustered file.
That value must identify the containing output file; the ALL path correctly
always uses the new fileName. Please preserve the original commit time but
always assign the new file name, and strengthen the clustering test to compare
_hoodie_file_name with the actual input file name rather than checking only
non-nullness.
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