linliu-code commented on code in PR #11889:
URL: https://github.com/apache/hudi/pull/11889#discussion_r1757719303
##########
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/table/upgrade/EightToSevenDowngradeHandler.java:
##########
@@ -92,4 +115,52 @@ private static void
downgradePartitionFields(HoodieWriteConfig config, HoodieEng
tablePropsToAdd.put(HoodieTableConfig.PARTITION_FIELDS,
tableConfig.getPartitionFieldProp());
}
}
+
+ static void downgradeMetadataPartitions(HoodieEngineContext context,
+ HoodieStorage hoodieStorage,
+ HoodieTableMetaClient mdtMetaClient,
+ Map<ConfigProperty, String>
tablePropsToAdd) {
+ // Fetch metadata partition paths.
+ List<String> metadataPartitions = FSUtils.getAllPartitionPaths(
+ context,
+ hoodieStorage,
+ mdtMetaClient.getBasePath(),
+ true);
+
+ // Delete partitions.
+ List<String> validPartitionPaths = deleteMetadataPartition(context,
mdtMetaClient, metadataPartitions);
+
+ // Clean the configuration.
+ tablePropsToAdd.put(TABLE_METADATA_PARTITIONS, String.join(",",
validPartitionPaths));
+ }
+
+ static List<String> deleteMetadataPartition(HoodieEngineContext context,
+ HoodieTableMetaClient
mdtMetaClient,
+ List<String> metadataPartitions)
{
+ List<String> validPartitionPaths = new ArrayList<>();
+
+ for (String partitionPath : metadataPartitions) {
Review Comment:
TBH, the readability of using Option is low. I can understand the for-loop
by 1 second, but it will take me much more time to figure out Stream api.
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