Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16700#discussion_r98134168
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/HiveExternalCatalog.scala ---
@@ -899,6 +918,22 @@ private[spark] class HiveExternalCatalog(conf:
SparkConf, hadoopConf: Configurat
spec, partitionColumnNames, tablePath)
try {
tablePath.getFileSystem(hadoopConf).rename(wrongPath, rightPath)
+
+ // If the newSpec contains more than one depth partition,
FileSystem.rename just deletes
+ // the leaf(i.e. wrongPath), we should check if wrongPath's
parents need to be deleted.
+ // for example:
+ // newSpec is 'A=1/B=2', after renamePartitions by Hive, the
location path in FileSystem
+ // is changed to 'a=1/b=2', which is wrongPath, then we renamed
to 'A=1/B=2', and
+ // 'a=1/b=2' in FileSystem is deleted, while 'a=1' is already
exists,
+ // which should also be deleted
--- End diff --
How about?
> For example, give a newSpec 'A=1/B=2', after calling Hive's
client.renamePartitions, the location path in FileSystem is changed to
'a=1/b=2', which is wrongPath. Then, although we renamed it to 'A=1/B=2',
'a=1/b=2' in FileSystem is deleted but 'a=1' still exists. We also need to
delete the useless directory.
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